Java/File Input Output/Text Read Write
Версия от 18:01, 31 мая 2010; (обсуждение)
Содержание
- 1 An iterator that breaks text into lines. The result is equal to BufferedReader.readLine().
- 2 Compare text file line by line
- 3 CRLF Print Writer
- 4 CRLF Terminated Reader
- 5 Data Text Writer
- 6 Dump a String to a text file with encoding.
- 7 Find a pattern within a file
- 8 Gets the content from a File as String Array List
- 9 Java File Generator
- 10 Load a text file contents as a String.
- 11 Load File As Text
- 12 Load file content to List
- 13 Load file line by line
- 14 Read and return the entire contents of the supplied File.
- 15 Searches case sensitively in a file
- 16 To Hex String and char
- 17 Writing delimited text data to a file or a stream
An iterator that breaks text into lines. The result is equal to BufferedReader.readLine().
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------------
* LineBreakIterator.java
* ----------------------
* (C)opyright 2003, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: LineBreakIterator.java,v 1.4 2005/11/03 09:55:26 mungady Exp $
*
* Changes
* -------
* 13-03-2003 : Initial version
*/
import java.util.Iterator;
/**
* An iterator that breaks text into lines. The result is equal to
* BufferedReader.readLine().
*
* @author Thomas Morgner
*/
public class LineBreakIterator implements Iterator {
/** A useful constant. */
public static final int DONE = -1;
/** Storage for the text. */
private char[] text;
/** The current position. */
private int position;
/**
* Default constructor.
*/
public LineBreakIterator() {
setText("");
}
/**
* Creates a new line break iterator.
*
* @param text
* the text to be broken up.
*/
public LineBreakIterator(final String text) {
setText(text);
}
/**
* Returns the position of the next break.
*
* @return A position.
*/
public synchronized int nextPosition() {
if (this.text == null) {
return DONE;
}
if (this.position == DONE) {
return DONE;
}
// recognize \n, \r, \r\n
final int nChars = this.text.length;
int nextChar = this.position;
for (;;) {
if (nextChar >= nChars) {
/* End of text reached */
this.position = DONE;
return DONE;
}
boolean eol = false;
char c = 0;
int i;
// search the next line break, either \n or \r
for (i = nextChar; i < nChars; i++) {
c = this.text[i];
if ((c == "\n") || (c == "\r")) {
eol = true;
break;
}
}
nextChar = i;
if (eol) {
nextChar++;
if (c == "\r") {
if ((nextChar < nChars) && (this.text[nextChar] == "\n")) {
nextChar++;
}
}
this.position = nextChar;
return (this.position);
}
}
}
/**
* Same like next(), but returns the End-Of-Text as if there was a linebreak
* added (Reader.readLine() compatible)
*
* @return The next position.
*/
public int nextWithEnd() {
final int pos = this.position;
if (pos == DONE) {
return DONE;
}
if (pos == this.text.length) {
this.position = DONE;
return DONE;
}
final int retval = nextPosition();
if (retval == DONE) {
return this.text.length;
}
return retval;
}
/**
* Returns the text to be broken up.
*
* @return The text.
*/
public String getText() {
return new String(this.text);
}
/**
* Sets the text to be broken up.
*
* @param text
* the text.
*/
public void setText(final String text) {
this.position = 0;
this.text = text.toCharArray();
}
/**
* Returns <tt>true</tt> if the iteration has more elements. (In other
* words, returns <tt>true</tt> if <tt>next</tt> would return an element
* rather than throwing an exception.)
*
* @return <tt>true</tt> if the iterator has more elements.
*/
public boolean hasNext() {
return (this.position != DONE);
}
/**
* Returns the next element in the iteration.
*
* @return the next element in the iteration.
*/
public Object next() {
if (this.position == DONE) {
// allready at the end ...
return null;
}
final int lastFound = this.position;
int pos = nextWithEnd();
if (pos == DONE) {
// the end of the text has been reached ...
return new String(this.text, lastFound, this.text.length - lastFound);
}
// step one char back
if (pos > 0) {
final int end = lastFound;
for (; ((pos) > end) && ((this.text[pos - 1] == "\n") || this.text[pos - 1] == "\r"); pos--) {
// search the end of the current linebreak sequence ..
}
}
// System.out.println ("text: " + new String (text));
// System.out.println ("pos: " + pos + " lastFound: " + lastFound);
return new String(this.text, lastFound, pos - lastFound);
}
/**
*
* Removes from the underlying collection the last element returned by the
* iterator (optional operation). This method can be called only once per call
* to <tt>next</tt>. The behavior of an iterator is unspecified if the
* underlying collection is modified while the iteration is in progress in any
* way other than by calling this method.
*
* @exception UnsupportedOperationException
* if the <tt>remove</tt> operation is not supported by this
* Iterator.
* @exception IllegalStateException
* if the <tt>next</tt> method has not yet been called, or the
* <tt>remove</tt> method has already been called after the
* last call to the <tt>next</tt> method.
*/
public void remove() {
throw new UnsupportedOperationException("This iterator is read-only.");
}
}
Compare text file line by line
/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//based on Apache technology http://www.apache.org
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Reader;
import java.util.List;
public class Diff
{
public static void readersAsText(Reader r1, String name1, Reader r2, String name2,
List diffs)
throws IOException
{
LineNumberReader reader1 = new LineNumberReader(r1);
LineNumberReader reader2 = new LineNumberReader(r2);
String line1 = reader1.readLine();
String line2 = reader2.readLine();
while (line1 != null && line2 != null)
{
if (!line1.equals(line2))
{
diffs.add("File \"" + name1 + "\" and file \"" +
name2 + "\" differ at line " + reader1.getLineNumber() +
":" + "\n" + line1 + "\n" + line2);
break;
}
line1 = reader1.readLine();
line2 = reader2.readLine();
}
if (line1 == null && line2 != null)
diffs.add("File \"" + name2 + "\" has extra lines at line " +
reader2.getLineNumber() + ":\n" + line2);
if (line1 != null && line2 == null)
diffs.add("File \"" + name1 + "\" has extra lines at line " +
reader1.getLineNumber() + ":\n" + line1);
}
}
CRLF Print Writer
/* -----------------------------------------------------------
* nntp//rss - a bridge between the RSS world and NNTP clients
* Copyright (c) 2002, 2003 Jason Brome. All Rights Reserved.
*
* email: nntprss@methodize.org
* mail: Methodize Solutions
* PO Box 3865
* Grand Central Station
* New York NY 10163
*
* This file is part of nntp//rss
*
* nntp//rss is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
* ----------------------------------------------------- */
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
/**
*
* Wrapper class - used for output writer in NNTP communications
* All lines must end in CR/LF - if println is used in
* standard PrintWriter implementation, platform specific
* line termination will be used - e.g. \r\n *or* \n
*
* @author Jason Brome <jason@methodize.org>
* @version $Id: CRLFPrintWriter.java,v 1.3 2003/01/22 05:11:23 jasonbrome Exp $
*/
public class CRLFPrintWriter extends PrintWriter {
private static final String CRLF = "\r\n";
public CRLFPrintWriter(OutputStream out) {
super(out);
}
public CRLFPrintWriter(OutputStream out, boolean autoFlush) {
super(out, autoFlush);
}
public CRLFPrintWriter(Writer out) {
super(out);
}
public CRLFPrintWriter(Writer out, boolean autoFlush) {
super(out, autoFlush);
}
/**
* @see java.io.PrintWriter#println()
*/
public void println() {
super.print(CRLF);
}
/**
* @see java.io.PrintWriter#println(boolean)
*/
public void println(boolean arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(char)
*/
public void println(char arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(char[])
*/
public void println(char[] arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(double)
*/
public void println(double arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(float)
*/
public void println(float arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(int)
*/
public void println(int arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(long)
*/
public void println(long arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(Object)
*/
public void println(Object arg0) {
super.print(arg0);
println();
}
/**
* @see java.io.PrintWriter#println(String)
*/
public void println(String arg0) {
super.print(arg0);
println();
}
}
CRLF Terminated Reader
/****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one *
* or more contributor license agreements. See the NOTICE file *
* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you under the Apache License, Version 2.0 (the *
* "License"); you may not use this file except in compliance *
* with the License. You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, *
* software distributed under the License is distributed on an *
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
* KIND, either express or implied. See the License for the *
* specific language governing permissions and limitations *
* under the License. *
****************************************************************/
import java.io.InputStream;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.io.IOException;
/**
* A Reader for use with SMTP or other protocols in which lines
* must end with CRLF. Extends Reader and overrides its
* readLine() method. The Reader readLine() method cannot
* serve for SMTP because it ends lines with either CR or LF alone.
*/
public class CRLFTerminatedReader extends Reader {
public class TerminationException extends IOException {
private int where;
public TerminationException(int where) {
super();
this.where = where;
}
public TerminationException(String s, int where) {
super(s);
this.where = where;
}
public int position() {
return where;
}
}
public class LineLengthExceededException extends IOException {
public LineLengthExceededException(String s) {
super(s);
}
}
/**
* Constructs this CRLFTerminatedReader.
* @param in an InputStream
* @param charsetName the String name of a supported charset.
* "ASCII" is common here.
* @throws UnsupportedEncodingException if the named charset
* is not supported
*/
InputStream in;
public CRLFTerminatedReader(InputStream in) {
this.in = in;
}
public CRLFTerminatedReader(InputStream in, String enc) throws UnsupportedEncodingException {
this(in);
}
private StringBuffer lineBuffer = new StringBuffer();
private final int
EOF = -1,
CR = 13,
LF = 10;
private int tainted = -1;
/**
* Read a line of text which is terminated by CRLF. The concluding
* CRLF characters are not returned with the String, but if either CR
* or LF appears in the text in any other sequence it is returned
* in the String like any other character. Some characters at the
* end of the stream may be lost if they are in a "line" not
* terminated by CRLF.
*
* @return either a String containing the contents of a
* line which must end with CRLF, or null if the end of the
* stream has been reached, possibly discarding some characters
* in a line not terminated with CRLF.
* @throws IOException if an I/O error occurs.
*/
public String readLine() throws IOException{
//start with the StringBuffer empty
lineBuffer.delete(0, lineBuffer.length());
/* This boolean tells which state we are in,
* depending upon whether or not we got a CR
* in the preceding read().
*/
boolean cr_just_received = false;
// Until we add support for specifying a maximum line lenth as
// a Service Extension, limit lines to 2K, which is twice what
// RFC 2821 4.5.3.1 requires.
while (lineBuffer.length() <= 2048) {
int inChar = read();
if (!cr_just_received){
//the most common case, somewhere before the end of a line
switch (inChar){
case CR : cr_just_received = true;
break;
case EOF : return null; // premature EOF -- discards data(?)
case LF : //the normal ending of a line
if (tainted == -1) tainted = lineBuffer.length();
// intentional fall-through
default : lineBuffer.append((char)inChar);
}
}else{
// CR has been received, we may be at end of line
switch (inChar){
case LF : // LF without a preceding CR
if (tainted != -1) {
int pos = tainted;
tainted = -1;
throw new TerminationException("\"bare\" CR or LF in data stream", pos);
}
return lineBuffer.toString();
case EOF : return null; // premature EOF -- discards data(?)
case CR : //we got two (or more) CRs in a row
if (tainted == -1) tainted = lineBuffer.length();
lineBuffer.append((char)CR);
break;
default : //we got some other character following a CR
if (tainted == -1) tainted = lineBuffer.length();
lineBuffer.append((char)CR);
lineBuffer.append((char)inChar);
cr_just_received = false;
}
}
}//while
throw new LineLengthExceededException("Exceeded maximum line length");
}//method readLine()
public int read() throws IOException {
return in.read();
}
public boolean ready() throws IOException {
return in.available() > 0;
}
public int read(char cbuf[], int off, int len) throws IOException {
byte [] temp = new byte[len];
int result = in.read(temp, 0, len);
for (int i=0;i<result;i++) cbuf[i] = (char) temp[i];
return result;
}
public void close() throws IOException {
in.close();
}
}
Data Text Writer
//** Copyright Statement ***************************************************
//The Salmon Open Framework for Internet Applications (SOFIA)
// Copyright (C) 1999 - 2002, Salmon LLC
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation;
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// For more information please visit http://www.salmonllc.ru
//** End Copyright Statement ***************************************************
/////////////////////////
//$Archive: /JADE/SourceCode/com/salmonllc/util/DataTextWriter.java $
//$Author: Dan $
//$Revision: 7 $
//$Modtime: 10/30/02 2:59p $
/////////////////////////
import java.util.*;
import java.io.*;
/**
* This object allows you to write a flat text file with data elements separated by Separators and such.
*/
public class DataTextWriter {
private int NumColumns=0;
private Vector[] Columns;
private String LineBreak="\r\n";
private String Separator=",";
private boolean Quoted=false;
private char QuoteCharacter="\0";
private StringBuffer sbTextBuffer=new StringBuffer();
/**
* Builds a DataTextWriter with each row containing iNumColumns.
* @param iNumCols The number of columns in a row of the DataTextWriter.
*/
public DataTextWriter(int iNumCols) {
this(iNumCols,"","","\0",false);
}
/**
* Builds a DataTextWriter with each row containing iNumCols and each piece of Data separated by sSeparator.
* @param iNumCols The number of columns in a row of the DataTextWriter.
* @param sSeparator The separator used to separate data columns in a row.
*/
public DataTextWriter(int iNumCols,String sSeparator) {
this(iNumCols,sSeparator,"","\0",false);
}
/**
* Builds a DataTextWriter with each row containing iNumCols and each piece of Data separated by sSeparator
* and row separated by sLineBreak.
* @param iNumCols The number of columns in a row of the DataTextWriter.
* @param sSeparator The separator used to separate data columns in a row.
* @param sLineBreak The separator used to separate individual rows.
*/
public DataTextWriter(int iNumCols,String sSeparator,String sLineBreak) {
this(iNumCols,sSeparator,sLineBreak,"\0",false);
}
/**
* Builds a DataTextWriter with each row containing iNumColumns and each piece of Data separated by sSeparator
* and row separated by sLineBreak and each piece of Data is surrounded by cQuoteChar if bQuoted is true.
* @param iNumCols The number of columns in a row of the DataTextWriter.
* @param sSeparator The separator used to separate data columns in a row.
* @param sLineBreak The separator used to separate individual rows.
* @param cQuoteChar The character used to quote indivividual data columns.
* @param bQuoted The flag to indicate if data columns are to be quoted.
*/
public DataTextWriter(int iNumCols,String sSeparator,String sLineFeed,char cQuoteChar,boolean bQuoted) {
NumColumns=iNumCols;
Separator=sSeparator;
LineBreak=sLineFeed;
QuoteCharacter=cQuoteChar;
Quoted=bQuoted;
Columns=new Vector[iNumCols];
for (int i=0;i<iNumCols;i++)
Columns[i]=new Vector(100,100);
}
/**
* Adds a piece of data to a specific column in this DataTextWriter.
* @param iColumn The column which the specified data belongs to.
* @param sData The data for the specified column.
*/
public void addData(int iColumn,String sData) throws Exception {
if (iColumn<0 || iColumn>=NumColumns)
throw new Exception("Column Index is out of range. Valid Range is (0-"+(NumColumns-1)+").");
Columns[iColumn].addElement(sData);
int iCount=Columns[0].size();
for (int i=1;i<NumColumns;i++)
if (Columns[i].size()!=iCount)
return;
int i=Columns[iColumn].size()-1;
for (int j=0;j<(NumColumns-1);j++) {
if (Quoted)
sbTextBuffer.append(QuoteCharacter+(String)Columns[j].elementAt(i)+QuoteCharacter+Separator);
else
sbTextBuffer.append((String)Columns[j].elementAt(i)+Separator);
}
if (Quoted)
sbTextBuffer.append(QuoteCharacter+(String)Columns[NumColumns-1].elementAt(i)+QuoteCharacter+LineBreak);
else
sbTextBuffer.append((String)Columns[NumColumns-1].elementAt(i)+LineBreak);
}
/**
* This method returns the Data in DataTextWriter in formatted output string.
* @return Formatted Output
*/
public String getText() /*throws DataTextWriterException*/ {
// StringBuffer sb=new StringBuffer();
/* int iCount=Columns[0].size();
for (int i=1;i<NumColumns;i++)
if (Columns[i].size()!=iCount)
throw new DataTextWriterException("There is not an equal number data values in each column.");*/
/* for (int i=0;i<iCount;i++) {
for (int j=0;j<NumColumns-1;j++) {
if (Quoted)
sb.append(QuoteCharacter+(String)Columns[j].elementAt(i)+QuoteCharacter+Separator);
else
sb.append((String)Columns[j].elementAt(i)+Separator);
}
if (Quoted)
sb.append(QuoteCharacter+(String)Columns[NumColumns-1].elementAt(i)+QuoteCharacter+LineBreak);
else
sb.append((String)Columns[NumColumns-1].elementAt(i)+LineBreak);
} */
return sbTextBuffer.toString();
}
/**
* This method returns the length of the Data in DataTextWriter in formatted output string.
* @return Formatted Output
*/
public int getTextLength() {
return sbTextBuffer.length();
}
/**
* Sets the LineBreak Separator in this DataTextWriter.
* @param sLineBreak The separator used to separate individual rows.
*/
public void setLineBreak(String sLineBreak) {
LineBreak=sLineBreak;
}
/**
* Sets the Character to be used for Quoting Data Columns in this DataTextWriter.
* @param cQuoteChar The character used to quote individual data columns.
*/
public void setQuoteCharacter(char cQuoteChar) {
QuoteCharacter=cQuoteChar;
}
/**
* Sets the Flag to to inicate that Data Columns are to be quoted in this DataTextWriter.
* @param bQuoted The flag used to indicate if data columns are quoted.
*/
public void setQuoted(boolean bQuoted) {
Quoted=bQuoted;
}
/**
* Sets the Separator to be used for separating individual Data Columns in this DataTextWriter.
* @param sSeparator The separator used to separate individual data columns.
*/
public void setSeparator(String sSeparator) {
Separator=sSeparator;
}
/**
* This method creates a flat file containing the data added to this DataTextWriter.
* @param sFilename The name of flat file to create.
*/
public void writeFile(String sFilename) throws Exception {
try {
FileOutputStream fos=new FileOutputStream(sFilename);
PrintWriter pw=new PrintWriter(fos);
pw.print(getText());
pw.close();
fos.close();
}
catch(Exception e) {
throw new Exception(e.getMessage());
}
}
}
Dump a String to a text file with encoding.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class Main {
/**
* Dump a <code>String</code> to a text file.
*
* @param file The output file
* @param string The string to be dumped
* @param encoding The encoding for the output file or null for default platform encoding
* @exception IOException IO Error
*/
public static void serializeString(File file, String string, String encoding)
throws IOException {
final Writer fw =
(encoding == null)?
new FileWriter(file):
new OutputStreamWriter(new FileOutputStream(file), encoding);
try {
fw.write(string);
fw.flush();
} finally {
fw.close();
}
}
}
Find a pattern within a file
/*
* @(#)Grep.java 1.3 01/12/13
* Search a list of files for lines that match a given regular-expression
* pattern. Demonstrates NIO mapped byte buffers, charsets, and regular
* expressions.
*
* Copyright 2001-2002 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* -Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduct the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
* DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
* RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR
* ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE
* FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT,
* SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
* THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that Software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.CharBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* This is a utility class to find a pattern within a file, specifically the
* sense.idx file.
*
* @author brett
*
*/
public class Grep {
/**
* Set the character set for the file.
*/
private static Charset charset = Charset.forName("ISO-8859-15");
/**
* The decoder for the file.
*/
private static CharsetDecoder decoder = charset.newDecoder();
/**
* Line parsing pattern.
*/
private static Pattern linePattern = Pattern.rupile(".*\r?\n");
/**
* Input pattern we"re looking for.
*/
private static Pattern pattern;
/**
* The character buffer reference.
*/
private static CharBuffer indexFile;
/**
* Compiles the pattern.
*
* @param pat
* regex
*/
private static void compile(String pat) {
try {
pattern = Pattern.rupile(pat);
} catch (PatternSyntaxException x) {
System.err.println(x.getMessage());
}
}
/**
* Use the linePattern to break the given CharBuffer into lines, applying the
* input pattern to each line to see if we have a match
*/
private static List grep() {
List matches = new ArrayList();
Matcher lm = linePattern.matcher(indexFile); // Line matcher
Matcher pm = null; // Pattern matcher
int lines = 0;
while (lm.find()) {
lines++;
CharSequence cs = lm.group(); // The current line
if (pm == null)
pm = pattern.matcher(cs);
else
pm.reset(cs);
if (pm.find()) {
matches.add(cs.toString());
}
if (lm.end() == indexFile.limit())
break;
}
return matches;
}
public static void setFile(File f) throws IOException {
FileInputStream fis = new FileInputStream(f);
FileChannel fc = fis.getChannel();
// Get the file"s size and then map it into memory
int sz = (int) fc.size();
MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
// Decode the file into a char buffer
indexFile = decoder.decode(bb);
fc.close();
}
/**
* Search for occurrences in the given file of the offset, then find the
* appropriate lemma.
*
* @param f
* @param synsetOffset
* @return
* @throws IOException
*/
public static List grep(String synsetOffset) throws IOException {
compile(synsetOffset);
// Perform the search
List matches = grep();
return matches;
}
/**
* Search for occurrences in the given file of the offset, then find the
* appropriate lemma.
*
* @param f
* @param synsetOffset
* @return
* @throws IOException
*/
public static String grep(String synsetOffset, String lemma) throws IOException {
compile(synsetOffset);
String m = "";
// Perform the search
List matches = grep();
for (int i = 0; i < matches.size(); i++) {
String match = (String) matches.get(i);
if (match.indexOf(lemma) != -1) {
m = match;
}
}
return m;
}
}
Gets the content from a File as String Array List
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2005 Marc Eppelmann
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Provides general global file utility methods
*
* @author marc.eppelmann
*/
class FileUtil
{
//~ Constructors ***********************************************************************
/**
* Creates a new FileUtil object.
*/
public FileUtil()
{
}
//~ Methods ****************************************************************************
/**
* Gets the content from a File as StringArray List.
*
* @param fileName A file to read from.
* @return List of individual line of the specified file. List may be empty but not
* null.
* @throws IOException
*/
public static ArrayList getFileContent(String fileName)
throws IOException
{
ArrayList result = new ArrayList();
File aFile = new File(fileName);
if (!aFile.isFile())
{
//throw new IOException( fileName + " is not a regular File" );
return result; // None
}
BufferedReader reader = null;
try
{
reader = new BufferedReader(new FileReader(aFile));
}
catch (FileNotFoundException e1)
{
// TODO handle Exception
e1.printStackTrace();
return result;
}
String aLine = null;
while ((aLine = reader.readLine()) != null)
{
result.add(aLine + "\n");
}
reader.close();
return result;
}
/**
* Searches case sensitively, and returns true if the given SearchString occurs in the
* first File with the given Filename.
*
* @param aFileName A files name
* @param aSearchString the string search for
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString)
{
return (fileContains(aFileName, aSearchString, false));
}
/**
* Tests if the given File contains the given Search String
*
* @param aFileName A files name
* @param aSearchString the String to search for
* @param caseInSensitiveSearch If false the Search is casesensitive
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString,
boolean caseInSensitiveSearch)
{
boolean result = false;
String searchString = caseInSensitiveSearch
? aSearchString.toLowerCase() : aSearchString;
ArrayList fileContent = new ArrayList();
try
{
fileContent = getFileContent(aFileName);
}
catch (IOException e)
{
// TODO handle Exception
e.printStackTrace();
}
Iterator linesIter = fileContent.iterator();
while (linesIter.hasNext())
{
String currentline = (String) linesIter.next();
if (caseInSensitiveSearch)
{
currentline = currentline.toLowerCase();
}
if (currentline.indexOf(searchString) > -1)
{
result = true;
break;
}
}
return result;
}
/**
* Gets file date and time.
*
* @param url The URL of the file for which date and time will be returned.
* @return Returns long value which is the date and time of the file. If any error
* occures returns -1 (=no file date and time available).
*/
public static long getFileDateTime(URL url)
{
if (url == null)
{
return -1;
}
String fileName = url.getFile();
if (fileName.charAt(0) == "/" || fileName.charAt(0) == "\\")
{
fileName = fileName.substring(1, fileName.length());
}
try
{
File file = new File(fileName);
// File name must be a file or a directory.
if (!file.isDirectory() && !file.isFile())
{
return -1;
}
return file.lastModified();
}
catch (java.lang.Exception e)
{ // Trap all Exception based exceptions and return -1.
return -1;
}
}
public static String[] getFileNames(String dirPath) throws Exception
{
return getFileNames(dirPath, null);
}
public static String[] getFileNames(String dirPath, FilenameFilter fileNameFilter) throws Exception
{
String fileNames[] = null;
File dir = new File(dirPath);
if (dir.isDirectory())
{
if (fileNameFilter != null)
{
fileNames = dir.list(fileNameFilter);
}
else
{
fileNames = dir.list();
}
}
return fileNames;
}
/**
* Test main
*
* @param args
*/
public static void main(String[] args)
{
}
}
Java File Generator
/* Copyright (c) 2008, Paul Cager.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
/**
* Generates boiler-plate files from templates. Only very basic
* template processing is supplied - if we need something more
* sophisticated I suggest we use a third-party library.
*
* @author paulcager
* @since 4.2
*/
public class JavaFileGenerator {
/**
* @param templateName the name of the template. E.g.
* "/templates/Token.template".
* @param options the processing options in force, such
* as "STATIC=yes"
*/
public JavaFileGenerator(String templateName, Map options) {
this.templateName = templateName;
this.options = options;
}
private final String templateName;
private final Map options;
private String currentLine;
/**
* Generate the output file.
* @param out
* @throws IOException
*/
public void generate(PrintWriter out) throws IOException
{
InputStream is = getClass().getResourceAsStream(templateName);
if (is == null)
throw new IOException("Invalid template name: " + templateName);
BufferedReader in = new BufferedReader(new InputStreamReader(is));
process(in, out, false);
}
private String peekLine(BufferedReader in) throws IOException
{
if (currentLine == null)
currentLine = in.readLine();
return currentLine;
}
private String getLine(BufferedReader in) throws IOException
{
String line = currentLine;
currentLine = null;
if (line == null)
in.readLine();
return line;
}
private boolean evaluate(String condition)
{
condition = condition.trim();
Object obj = options.get(condition);
if (obj == null)
{
return condition.equalsIgnoreCase("true") || condition.equalsIgnoreCase("yes");
}
if (obj instanceof Boolean)
{
return ((Boolean)obj).booleanValue();
}
else if (obj instanceof String)
{
String string = ((String)obj).trim();
return string.length() > 0 && !string.equalsIgnoreCase("false") && !string.equalsIgnoreCase("no");
}
return false;
}
private String substitute(String text) throws IOException
{
int startPos;
if ( (startPos = text.indexOf("${")) == -1)
{
return text;
}
// Find matching "}".
int braceDepth = 1;
int endPos = startPos + 2;
while ( endPos < text.length() && braceDepth > 0)
{
if (text.charAt(endPos) == "{")
braceDepth++;
else if (text.charAt(endPos) == "}")
braceDepth--;
endPos++;
}
if (braceDepth != 0)
throw new IOException("Mismatched \"{}\" in template string: " + text);
final String variableExpression = text.substring(startPos + 2, endPos - 1);
// Find the end of the variable name
String value = null;
for (int i = 0; i < variableExpression.length(); i++)
{
char ch = variableExpression.charAt(i);
if (ch == ":" && i < variableExpression.length() - 1 && variableExpression.charAt(i+1) == "-" )
{
value = substituteWithDefault(variableExpression.substring(0, i), variableExpression.substring(i + 2));
break;
}
else if (ch == "?")
{
value = substituteWithConditional(variableExpression.substring(0, i), variableExpression.substring(i + 1));
break;
}
else if (ch != "_" && !Character.isJavaIdentifierPart(ch))
{
throw new IOException("Invalid variable in " + text);
}
}
if (value == null)
{
value = substituteWithDefault(variableExpression, "");
}
return text.substring(0, startPos) + value + text.substring(endPos);
}
/**
* @param substring
* @param defaultValue
* @return
* @throws IOException
*/
private String substituteWithConditional(String variableName, String values) throws IOException
{
// Split values into true and false values.
int pos = values.indexOf(":");
if (pos == -1)
throw new IOException("No ":" separator in " + values);
if (evaluate(variableName))
return substitute(values.substring(0, pos));
else
return substitute(values.substring(pos + 1));
}
/**
* @param variableName
* @param defaultValue
* @return
*/
private String substituteWithDefault(String variableName, String defaultValue) throws IOException
{
Object obj = options.get(variableName.trim());
if (obj == null || obj.toString().length() == 0)
return substitute(defaultValue);
return obj.toString();
}
private void write(PrintWriter out, String text) throws IOException
{
while ( text.indexOf("${") != -1)
{
text = substitute(text);
}
out.println(text);
}
private void process(BufferedReader in, PrintWriter out, boolean ignoring) throws IOException
{
// out.println("*** process ignore=" + ignoring + " : " + peekLine(in));
while ( peekLine(in) != null)
{
if (peekLine(in).trim().startsWith("#if"))
{
String line = getLine(in).trim();
final boolean condition = evaluate(line.substring(3).trim());
process(in, out, ignoring || !condition);
if (peekLine(in) != null && peekLine(in).trim().startsWith("#else"))
{
getLine(in); // Discard the #else line
process(in, out, ignoring || condition);
}
line = getLine(in);
if (line == null)
throw new IOException("Missing \"#fi\"");
if (!line.trim().startsWith("#fi"))
throw new IOException("Expected \"#fi\", got: " + line);
}
else if (peekLine(in).trim().startsWith("#"))
{
break;
}
else
{
String line = getLine(in);
if (!ignoring) write(out, line);
}
}
out.flush();
}
public static void main(String[] args) throws Exception
{
Map map = new HashMap();
map.put("falseArg", Boolean.FALSE);
map.put("trueArg", Boolean.TRUE);
map.put("stringValue", "someString");
new JavaFileGenerator(args[0], map).generate(new PrintWriter(args[1]));
}
}
Load a text file contents as a String.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class Main {
/**
* Load a text file contents as a <code>String<code>.
* This method does not perform enconding conversions
*
* @param file The input file
* @return The file contents as a <code>String</code>
* @exception IOException IO Error
*/
public static String deserializeString(File file)
throws IOException {
int len;
char[] chr = new char[4096];
final StringBuffer buffer = new StringBuffer();
final FileReader reader = new FileReader(file);
try {
while ((len = reader.read(chr)) > 0) {
buffer.append(chr, 0, len);
}
} finally {
reader.close();
}
return buffer.toString();
}
}
Load File As Text
/*
GNU LESSER GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: lobochief@users.sourceforge.net
*/
/*
* Created on Mar 19, 2005
*/
import java.io.*;
/**
* @author J. H. S.
*/
public class IORoutines {
public static final byte[] LINE_BREAK_BYTES = { (byte) 13, (byte) 10 };
public static String loadAsText(InputStream in, String encoding) throws IOException {
return loadAsText(in, encoding, 4096);
}
public static String loadAsText(InputStream in, String encoding, int bufferSize) throws IOException {
InputStreamReader reader = new InputStreamReader(in, encoding);
char[] buffer = new char[bufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
char[] newBuffer = new char[buffer.length * 2];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = reader.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
return new String(buffer, 0, offset);
}
public static byte[] load(File file) throws IOException {
long fileLength = file.length();
if(fileLength > Integer.MAX_VALUE) {
throw new IOException("File "" + file.getName() + "" too big");
}
InputStream in = new FileInputStream(file);
try {
return loadExact(in, (int) fileLength);
} finally {
in.close();
}
}
public static byte[] load(InputStream in) throws IOException {
return load(in, 4096);
}
public static byte[] load(InputStream in, int initialBufferSize) throws IOException {
if(initialBufferSize == 0) {
initialBufferSize = 1;
}
byte[] buffer = new byte[initialBufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
int newSize = buffer.length * 2;
byte[] newBuffer = new byte[newSize];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
if(offset < buffer.length) {
byte[] newBuffer = new byte[offset];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
}
return buffer;
}
public static byte[] loadExact(InputStream in, int length) throws IOException {
byte[] buffer = new byte[length];
int offset = 0;
for(;;) {
int remain = length - offset;
if(remain <= 0) {
break;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
throw new IOException("Reached EOF, read " + offset + " expecting " + length);
}
offset += numRead;
}
return buffer;
}
public static boolean equalContent(File file, byte[] content) throws IOException {
long length = file.length();
if(length > Integer.MAX_VALUE) {
throw new IOException("File "" + file + "" too big");
}
InputStream in = new FileInputStream(file);
try {
byte[] fileContent = loadExact(in, (int) length);
return java.util.Arrays.equals(content, fileContent);
} finally {
in.close();
}
}
public static void save(File file, byte[] content) throws IOException {
FileOutputStream out = new FileOutputStream(file);
try {
out.write(content);
} finally {
out.close();
}
}
/**
* Reads line without buffering.
*/
public static String readLine(InputStream in) throws IOException {
int b;
StringBuffer sb = null;
OUTER:
while((b = in.read()) != -1) {
if(sb == null) {
sb = new StringBuffer();
}
switch(b) {
case (byte) "\n":
break OUTER;
case (byte) "\r":
break;
default:
sb.append((char) b);
break;
}
}
return sb == null ? null : sb.toString();
}
public static void touch(File file) {
file.setLastModified(System.currentTimeMillis());
}
public static void saveStrings(File file, java.util.Collection list) throws IOException {
BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(file));
try {
PrintWriter writer = new PrintWriter(bout);
java.util.Iterator i = list.iterator();
while(i.hasNext()) {
String text = (String) i.next();
writer.println(text);
}
writer.flush();
} finally {
bout.close();
}
}
public static java.util.List loadStrings(File file) throws IOException {
java.util.List list = new java.util.LinkedList();
InputStream in = new FileInputStream(file);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while((line = reader.readLine()) != null) {
list.add(line);
}
return list;
} finally {
in.close();
}
}
}
Load file content to List
/*
GNU LESSER GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: lobochief@users.sourceforge.net
*/
/*
* Created on Mar 19, 2005
*/
import java.io.*;
/**
* @author J. H. S.
*/
public class IORoutines {
public static final byte[] LINE_BREAK_BYTES = { (byte) 13, (byte) 10 };
public static String loadAsText(InputStream in, String encoding) throws IOException {
return loadAsText(in, encoding, 4096);
}
public static String loadAsText(InputStream in, String encoding, int bufferSize) throws IOException {
InputStreamReader reader = new InputStreamReader(in, encoding);
char[] buffer = new char[bufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
char[] newBuffer = new char[buffer.length * 2];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = reader.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
return new String(buffer, 0, offset);
}
public static byte[] load(File file) throws IOException {
long fileLength = file.length();
if(fileLength > Integer.MAX_VALUE) {
throw new IOException("File "" + file.getName() + "" too big");
}
InputStream in = new FileInputStream(file);
try {
return loadExact(in, (int) fileLength);
} finally {
in.close();
}
}
public static byte[] load(InputStream in) throws IOException {
return load(in, 4096);
}
public static byte[] load(InputStream in, int initialBufferSize) throws IOException {
if(initialBufferSize == 0) {
initialBufferSize = 1;
}
byte[] buffer = new byte[initialBufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
int newSize = buffer.length * 2;
byte[] newBuffer = new byte[newSize];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
if(offset < buffer.length) {
byte[] newBuffer = new byte[offset];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
}
return buffer;
}
public static byte[] loadExact(InputStream in, int length) throws IOException {
byte[] buffer = new byte[length];
int offset = 0;
for(;;) {
int remain = length - offset;
if(remain <= 0) {
break;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
throw new IOException("Reached EOF, read " + offset + " expecting " + length);
}
offset += numRead;
}
return buffer;
}
public static boolean equalContent(File file, byte[] content) throws IOException {
long length = file.length();
if(length > Integer.MAX_VALUE) {
throw new IOException("File "" + file + "" too big");
}
InputStream in = new FileInputStream(file);
try {
byte[] fileContent = loadExact(in, (int) length);
return java.util.Arrays.equals(content, fileContent);
} finally {
in.close();
}
}
public static void save(File file, byte[] content) throws IOException {
FileOutputStream out = new FileOutputStream(file);
try {
out.write(content);
} finally {
out.close();
}
}
/**
* Reads line without buffering.
*/
public static String readLine(InputStream in) throws IOException {
int b;
StringBuffer sb = null;
OUTER:
while((b = in.read()) != -1) {
if(sb == null) {
sb = new StringBuffer();
}
switch(b) {
case (byte) "\n":
break OUTER;
case (byte) "\r":
break;
default:
sb.append((char) b);
break;
}
}
return sb == null ? null : sb.toString();
}
public static void touch(File file) {
file.setLastModified(System.currentTimeMillis());
}
public static void saveStrings(File file, java.util.Collection list) throws IOException {
BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(file));
try {
PrintWriter writer = new PrintWriter(bout);
java.util.Iterator i = list.iterator();
while(i.hasNext()) {
String text = (String) i.next();
writer.println(text);
}
writer.flush();
} finally {
bout.close();
}
}
public static java.util.List loadStrings(File file) throws IOException {
java.util.List list = new java.util.LinkedList();
InputStream in = new FileInputStream(file);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while((line = reader.readLine()) != null) {
list.add(line);
}
return list;
} finally {
in.close();
}
}
}
Load file line by line
/*
GNU LESSER GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: lobochief@users.sourceforge.net
*/
/*
* Created on Mar 19, 2005
*/
import java.io.*;
/**
* @author J. H. S.
*/
public class IORoutines {
public static final byte[] LINE_BREAK_BYTES = { (byte) 13, (byte) 10 };
public static String loadAsText(InputStream in, String encoding) throws IOException {
return loadAsText(in, encoding, 4096);
}
public static String loadAsText(InputStream in, String encoding, int bufferSize) throws IOException {
InputStreamReader reader = new InputStreamReader(in, encoding);
char[] buffer = new char[bufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
char[] newBuffer = new char[buffer.length * 2];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = reader.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
return new String(buffer, 0, offset);
}
public static byte[] load(File file) throws IOException {
long fileLength = file.length();
if(fileLength > Integer.MAX_VALUE) {
throw new IOException("File "" + file.getName() + "" too big");
}
InputStream in = new FileInputStream(file);
try {
return loadExact(in, (int) fileLength);
} finally {
in.close();
}
}
public static byte[] load(InputStream in) throws IOException {
return load(in, 4096);
}
public static byte[] load(InputStream in, int initialBufferSize) throws IOException {
if(initialBufferSize == 0) {
initialBufferSize = 1;
}
byte[] buffer = new byte[initialBufferSize];
int offset = 0;
for(;;) {
int remain = buffer.length - offset;
if(remain <= 0) {
int newSize = buffer.length * 2;
byte[] newBuffer = new byte[newSize];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
remain = buffer.length - offset;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
break;
}
offset += numRead;
}
if(offset < buffer.length) {
byte[] newBuffer = new byte[offset];
System.arraycopy(buffer, 0, newBuffer, 0, offset);
buffer = newBuffer;
}
return buffer;
}
public static byte[] loadExact(InputStream in, int length) throws IOException {
byte[] buffer = new byte[length];
int offset = 0;
for(;;) {
int remain = length - offset;
if(remain <= 0) {
break;
}
int numRead = in.read(buffer, offset, remain);
if(numRead == -1) {
throw new IOException("Reached EOF, read " + offset + " expecting " + length);
}
offset += numRead;
}
return buffer;
}
public static boolean equalContent(File file, byte[] content) throws IOException {
long length = file.length();
if(length > Integer.MAX_VALUE) {
throw new IOException("File "" + file + "" too big");
}
InputStream in = new FileInputStream(file);
try {
byte[] fileContent = loadExact(in, (int) length);
return java.util.Arrays.equals(content, fileContent);
} finally {
in.close();
}
}
public static void save(File file, byte[] content) throws IOException {
FileOutputStream out = new FileOutputStream(file);
try {
out.write(content);
} finally {
out.close();
}
}
/**
* Reads line without buffering.
*/
public static String readLine(InputStream in) throws IOException {
int b;
StringBuffer sb = null;
OUTER:
while((b = in.read()) != -1) {
if(sb == null) {
sb = new StringBuffer();
}
switch(b) {
case (byte) "\n":
break OUTER;
case (byte) "\r":
break;
default:
sb.append((char) b);
break;
}
}
return sb == null ? null : sb.toString();
}
public static void touch(File file) {
file.setLastModified(System.currentTimeMillis());
}
public static void saveStrings(File file, java.util.Collection list) throws IOException {
BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(file));
try {
PrintWriter writer = new PrintWriter(bout);
java.util.Iterator i = list.iterator();
while(i.hasNext()) {
String text = (String) i.next();
writer.println(text);
}
writer.flush();
} finally {
bout.close();
}
}
public static java.util.List loadStrings(File file) throws IOException {
java.util.List list = new java.util.LinkedList();
InputStream in = new FileInputStream(file);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while((line = reader.readLine()) != null) {
list.add(line);
}
return list;
} finally {
in.close();
}
}
}
Read and return the entire contents of the supplied File.
/*
* JBoss DNA (http://www.jboss.org/dna)
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
* See the AUTHORS.txt file in the distribution for a full listing of
* individual contributors.
*
* JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
* is licensed to you under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* JBoss DNA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
/**
* @author Randall Hauch
*/
public class Main {
/**
* Read and return the entire contents of the supplied {@link File}.
*
* @param file the file containing the information to be read; may be null
* @return the contents, or an empty string if the supplied reader is null
* @throws IOException if there is an error reading the content
*/
public static String read( File file ) throws IOException {
if (file == null) return "";
StringBuilder sb = new StringBuilder();
boolean error = false;
Reader reader = new FileReader(file);
try {
int numRead = 0;
char[] buffer = new char[1024];
while ((numRead = reader.read(buffer)) > -1) {
sb.append(buffer, 0, numRead);
}
} catch (IOException e) {
error = true; // this error should be thrown, even if there is an error closing reader
throw e;
} catch (RuntimeException e) {
error = true; // this error should be thrown, even if there is an error closing reader
throw e;
} finally {
try {
reader.close();
} catch (IOException e) {
if (!error) throw e;
}
}
return sb.toString();
}
}
Searches case sensitively in a file
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2005 Marc Eppelmann
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Provides general global file utility methods
*
* @author marc.eppelmann
*/
class FileUtil
{
//~ Constructors ***********************************************************************
/**
* Creates a new FileUtil object.
*/
public FileUtil()
{
}
//~ Methods ****************************************************************************
/**
* Gets the content from a File as StringArray List.
*
* @param fileName A file to read from.
* @return List of individual line of the specified file. List may be empty but not
* null.
* @throws IOException
*/
public static ArrayList getFileContent(String fileName)
throws IOException
{
ArrayList result = new ArrayList();
File aFile = new File(fileName);
if (!aFile.isFile())
{
//throw new IOException( fileName + " is not a regular File" );
return result; // None
}
BufferedReader reader = null;
try
{
reader = new BufferedReader(new FileReader(aFile));
}
catch (FileNotFoundException e1)
{
// TODO handle Exception
e1.printStackTrace();
return result;
}
String aLine = null;
while ((aLine = reader.readLine()) != null)
{
result.add(aLine + "\n");
}
reader.close();
return result;
}
/**
* Searches case sensitively, and returns true if the given SearchString occurs in the
* first File with the given Filename.
*
* @param aFileName A files name
* @param aSearchString the string search for
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString)
{
return (fileContains(aFileName, aSearchString, false));
}
/**
* Tests if the given File contains the given Search String
*
* @param aFileName A files name
* @param aSearchString the String to search for
* @param caseInSensitiveSearch If false the Search is casesensitive
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString,
boolean caseInSensitiveSearch)
{
boolean result = false;
String searchString = caseInSensitiveSearch
? aSearchString.toLowerCase() : aSearchString;
ArrayList fileContent = new ArrayList();
try
{
fileContent = getFileContent(aFileName);
}
catch (IOException e)
{
// TODO handle Exception
e.printStackTrace();
}
Iterator linesIter = fileContent.iterator();
while (linesIter.hasNext())
{
String currentline = (String) linesIter.next();
if (caseInSensitiveSearch)
{
currentline = currentline.toLowerCase();
}
if (currentline.indexOf(searchString) > -1)
{
result = true;
break;
}
}
return result;
}
/**
* Gets file date and time.
*
* @param url The URL of the file for which date and time will be returned.
* @return Returns long value which is the date and time of the file. If any error
* occures returns -1 (=no file date and time available).
*/
public static long getFileDateTime(URL url)
{
if (url == null)
{
return -1;
}
String fileName = url.getFile();
if (fileName.charAt(0) == "/" || fileName.charAt(0) == "\\")
{
fileName = fileName.substring(1, fileName.length());
}
try
{
File file = new File(fileName);
// File name must be a file or a directory.
if (!file.isDirectory() && !file.isFile())
{
return -1;
}
return file.lastModified();
}
catch (java.lang.Exception e)
{ // Trap all Exception based exceptions and return -1.
return -1;
}
}
public static String[] getFileNames(String dirPath) throws Exception
{
return getFileNames(dirPath, null);
}
public static String[] getFileNames(String dirPath, FilenameFilter fileNameFilter) throws Exception
{
String fileNames[] = null;
File dir = new File(dirPath);
if (dir.isDirectory())
{
if (fileNameFilter != null)
{
fileNames = dir.list(fileNameFilter);
}
else
{
fileNames = dir.list();
}
}
return fileNames;
}
/**
* Test main
*
* @param args
*/
public static void main(String[] args)
{
}
}
To Hex String and char
/* jcifs smb client library in Java
* Copyright (C) 2000 "Michael B. Allen" <jcifs at samba dot org>
* "Christopher R. Hertel" <jcifs at samba dot org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.io.OutputStream;
import java.io.PrintStream;
/**
*/
public class Hexdump {
private static final String NL = System.getProperty( "line.separator" );
private static final int NL_LENGTH = NL.length();
private static final char[] SPACE_CHARS = {
" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ",
" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ",
" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "
};
public static final char[] HEX_DIGITS = {
"0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "A", "B",
"C", "D", "E", "F"
};
/**
* Generate "hexdump" output of the buffer at src like the following:
*
* <p><blockquote><pre>
* 00000: 04 d2 29 00 00 01 00 00 00 00 00 01 20 45 47 46 |..)......... EGF|
* 00010: 43 45 46 45 45 43 41 43 41 43 41 43 41 43 41 43 |CEFEECACACACACAC|
* 00020: 41 43 41 43 41 43 41 43 41 43 41 41 44 00 00 20 |ACACACACACAAD.. |
* 00030: 00 01 c0 0c 00 20 00 01 00 00 00 00 00 06 20 00 |..... ........ .|
* 00040: ac 22 22 e1 |."". |
* </blockquote></pre>
*/
public static void hexdump( PrintStream ps, byte[] src, int srcIndex, int length ) {
if( length == 0 ) {
return;
}
int s = length % 16;
int r = ( s == 0 ) ? length / 16 : length / 16 + 1;
char[] c = new char[r * (74 + NL_LENGTH)];
char[] d = new char[16];
int i;
int si = 0;
int ci = 0;
do {
toHexChars( si, c, ci, 5 );
ci += 5;
c[ci++] = ":";
do {
if( si == length ) {
int n = 16 - s;
System.arraycopy( SPACE_CHARS, 0, c, ci, n * 3 );
ci += n * 3;
System.arraycopy( SPACE_CHARS, 0, d, s, n );
break;
}
c[ci++] = " ";
i = src[srcIndex + si] & 0xFF;
toHexChars( i, c, ci, 2 );
ci += 2;
if( i < 0 || Character.isISOControl( (char)i )) {
d[si % 16] = ".";
} else {
d[si % 16] = (char)i;
}
} while(( ++si % 16 ) != 0 );
c[ci++] = " ";
c[ci++] = " ";
c[ci++] = "|";
System.arraycopy( d, 0, c, ci, 16 );
ci += 16;
c[ci++] = "|";
NL.getChars( 0, NL_LENGTH, c, ci );
ci += NL_LENGTH;
} while( si < length );
ps.println( c );
}
/**
* This is an alternative to the <code>java.lang.Integer.toHexString</cod>
* method. It is an efficient relative that also will pad the left side so
* that the result is <code>size</code> digits.
*/
public static String toHexString( int val, int size ) {
char[] c = new char[size];
toHexChars( val, c, 0, size );
return new String( c );
}
public static String toHexString( long val, int size ) {
char[] c = new char[size];
toHexChars( val, c, 0, size );
return new String( c );
}
public static String toHexString( byte[] src, int srcIndex, int size ) {
char[] c = new char[size];
size = ( size % 2 == 0 ) ? size / 2 : size / 2 + 1;
for( int i = 0, j = 0; i < size; i++ ) {
c[j++] = HEX_DIGITS[(src[i] >> 4 ) & 0x0F];
if( j == c.length ) {
break;
}
c[j++] = HEX_DIGITS[src[i] & 0x0F];
}
return new String( c );
}
/**
* This is the same as {@link jcifs.util.Hexdump#toHexString(int val, int
* size)} but provides a more practical form when trying to avoid {@link
* java.lang.String} concatenation and {@link java.lang.StringBuffer}.
*/
public static void toHexChars( int val, char dst[], int dstIndex, int size ) {
while( size > 0 ) {
int i = dstIndex + size - 1;
if( i < dst.length ) {
dst[i] = HEX_DIGITS[val & 0x000F];
}
if( val != 0 ) {
val >>>= 4;
}
size--;
}
}
public static void toHexChars( long val, char dst[], int dstIndex, int size ) {
while( size > 0 ) {
dst[dstIndex + size - 1] = HEX_DIGITS[(int)( val & 0x000FL )];
if( val != 0 ) {
val >>>= 4;
}
size--;
}
}
}
Writing delimited text data to a file or a stream
/*
* Java CSV is a stream based library for reading and writing
* CSV and other delimited data.
*
* Copyright (C) Bruce Dunwiddie bruce@csvreader.ru
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.nio.charset.Charset;
/**
* A stream based writer for writing delimited text data to a file or a stream.
*/
public class CsvWriter {
private PrintWriter outputStream = null;
private String fileName = null;
private boolean firstColumn = true;
private boolean useCustomRecordDelimiter = false;
private Charset charset = null;
// this holds all the values for switches that the user is allowed to set
private UserSettings userSettings = new UserSettings();
private boolean initialized = false;
private boolean closed = false;
/**
* Double up the text qualifier to represent an occurance of the text
* qualifier.
*/
public static final int ESCAPE_MODE_DOUBLED = 1;
/**
* Use a backslash character before the text qualifier to represent an
* occurance of the text qualifier.
*/
public static final int ESCAPE_MODE_BACKSLASH = 2;
/**
* Creates a {@link com.csvreader.CsvWriter CsvWriter} object using a file
* as the data destination.
*
* @param fileName
* The path to the file to output the data.
* @param delimiter
* The character to use as the column delimiter.
* @param charset
* The {@link java.nio.charset.Charset Charset} to use while
* writing the data.
*/
public CsvWriter(String fileName, char delimiter, Charset charset) {
if (fileName == null) {
throw new IllegalArgumentException("Parameter fileName can not be null.");
}
if (charset == null) {
throw new IllegalArgumentException("Parameter charset can not be null.");
}
this.fileName = fileName;
userSettings.Delimiter = delimiter;
this.charset = charset;
}
/**
* Creates a {@link com.csvreader.CsvWriter CsvWriter} object using a file
* as the data destination. Uses a comma as the column delimiter and
* ISO-8859-1 as the {@link java.nio.charset.Charset Charset}.
*
* @param fileName
* The path to the file to output the data.
*/
public CsvWriter(String fileName) {
this(fileName, Letters.ruMA, Charset.forName("ISO-8859-1"));
}
/**
* Creates a {@link com.csvreader.CsvWriter CsvWriter} object using a Writer
* to write data to.
*
* @param outputStream
* The stream to write the column delimited data to.
* @param delimiter
* The character to use as the column delimiter.
*/
public CsvWriter(Writer outputStream, char delimiter) {
if (outputStream == null) {
throw new IllegalArgumentException("Parameter outputStream can not be null.");
}
this.outputStream = new PrintWriter(outputStream);
userSettings.Delimiter = delimiter;
initialized = true;
}
/**
* Creates a {@link com.csvreader.CsvWriter CsvWriter} object using an
* OutputStream to write data to.
*
* @param outputStream
* The stream to write the column delimited data to.
* @param delimiter
* The character to use as the column delimiter.
* @param charset
* The {@link java.nio.charset.Charset Charset} to use while
* writing the data.
*/
public CsvWriter(OutputStream outputStream, char delimiter, Charset charset) {
this(new OutputStreamWriter(outputStream, charset), delimiter);
}
/**
* Gets the character being used as the column delimiter.
*
* @return The character being used as the column delimiter.
*/
public char getDelimiter() {
return userSettings.Delimiter;
}
/**
* Sets the character to use as the column delimiter.
*
* @param delimiter
* The character to use as the column delimiter.
*/
public void setDelimiter(char delimiter) {
userSettings.Delimiter = delimiter;
}
public char getRecordDelimiter() {
return userSettings.RecordDelimiter;
}
/**
* Sets the character to use as the record delimiter.
*
* @param recordDelimiter
* The character to use as the record delimiter. Default is
* combination of standard end of line characters for Windows,
* Unix, or Mac.
*/
public void setRecordDelimiter(char recordDelimiter) {
useCustomRecordDelimiter = true;
userSettings.RecordDelimiter = recordDelimiter;
}
/**
* Gets the character to use as a text qualifier in the data.
*
* @return The character to use as a text qualifier in the data.
*/
public char getTextQualifier() {
return userSettings.TextQualifier;
}
/**
* Sets the character to use as a text qualifier in the data.
*
* @param textQualifier
* The character to use as a text qualifier in the data.
*/
public void setTextQualifier(char textQualifier) {
userSettings.TextQualifier = textQualifier;
}
/**
* Whether text qualifiers will be used while writing data or not.
*
* @return Whether text qualifiers will be used while writing data or not.
*/
public boolean getUseTextQualifier() {
return userSettings.UseTextQualifier;
}
/**
* Sets whether text qualifiers will be used while writing data or not.
*
* @param useTextQualifier
* Whether to use a text qualifier while writing data or not.
*/
public void setUseTextQualifier(boolean useTextQualifier) {
userSettings.UseTextQualifier = useTextQualifier;
}
public int getEscapeMode() {
return userSettings.EscapeMode;
}
public void setEscapeMode(int escapeMode) {
userSettings.EscapeMode = escapeMode;
}
public void setComment(char comment) {
userSettings.rument = comment;
}
public char getComment() {
return userSettings.rument;
}
/**
* Whether fields will be surrounded by the text qualifier even if the
* qualifier is not necessarily needed to escape this field.
*
* @return Whether fields will be forced to be qualified or not.
*/
public boolean getForceQualifier() {
return userSettings.ForceQualifier;
}
/**
* Use this to force all fields to be surrounded by the text qualifier even
* if the qualifier is not necessarily needed to escape this field. Default
* is false.
*
* @param forceQualifier
* Whether to force the fields to be qualified or not.
*/
public void setForceQualifier(boolean forceQualifier) {
userSettings.ForceQualifier = forceQualifier;
}
/**
* Writes another column of data to this record.
*
* @param content
* The data for the new column.
* @param preserveSpaces
* Whether to preserve leading and trailing whitespace in this
* column of data.
* @exception IOException
* Thrown if an error occurs while writing data to the
* destination stream.
*/
public void write(String content, boolean preserveSpaces)
throws IOException {
checkClosed();
checkInit();
if (content == null) {
content = "";
}
if (!firstColumn) {
outputStream.write(userSettings.Delimiter);
}
boolean textQualify = userSettings.ForceQualifier;
if (!preserveSpaces && content.length() > 0) {
content = content.trim();
}
if (!textQualify
&& userSettings.UseTextQualifier
&& (content.indexOf(userSettings.TextQualifier) > -1
|| content.indexOf(userSettings.Delimiter) > -1
|| (!useCustomRecordDelimiter && (content
.indexOf(Letters.LF) > -1 || content
.indexOf(Letters.CR) > -1))
|| (useCustomRecordDelimiter && content
.indexOf(userSettings.RecordDelimiter) > -1)
|| (firstColumn && content.length() > 0 && content
.charAt(0) == userSettings.rument) ||
// check for empty first column, which if on its own line must
// be qualified or the line will be skipped
(firstColumn && content.length() == 0))) {
textQualify = true;
}
if (userSettings.UseTextQualifier && !textQualify
&& content.length() > 0 && preserveSpaces) {
char firstLetter = content.charAt(0);
if (firstLetter == Letters.SPACE || firstLetter == Letters.TAB) {
textQualify = true;
}
if (!textQualify && content.length() > 1) {
char lastLetter = content.charAt(content.length() - 1);
if (lastLetter == Letters.SPACE || lastLetter == Letters.TAB) {
textQualify = true;
}
}
}
if (textQualify) {
outputStream.write(userSettings.TextQualifier);
if (userSettings.EscapeMode == ESCAPE_MODE_BACKSLASH) {
content = replace(content, "" + Letters.BACKSLASH, ""
+ Letters.BACKSLASH + Letters.BACKSLASH);
content = replace(content, "" + userSettings.TextQualifier, ""
+ Letters.BACKSLASH + userSettings.TextQualifier);
} else {
content = replace(content, "" + userSettings.TextQualifier, ""
+ userSettings.TextQualifier
+ userSettings.TextQualifier);
}
} else if (userSettings.EscapeMode == ESCAPE_MODE_BACKSLASH) {
content = replace(content, "" + Letters.BACKSLASH, ""
+ Letters.BACKSLASH + Letters.BACKSLASH);
content = replace(content, "" + userSettings.Delimiter, ""
+ Letters.BACKSLASH + userSettings.Delimiter);
if (useCustomRecordDelimiter) {
content = replace(content, "" + userSettings.RecordDelimiter,
"" + Letters.BACKSLASH + userSettings.RecordDelimiter);
} else {
content = replace(content, "" + Letters.CR, ""
+ Letters.BACKSLASH + Letters.CR);
content = replace(content, "" + Letters.LF, ""
+ Letters.BACKSLASH + Letters.LF);
}
if (firstColumn && content.length() > 0
&& content.charAt(0) == userSettings.rument) {
if (content.length() > 1) {
content = "" + Letters.BACKSLASH + userSettings.rument
+ content.substring(1);
} else {
content = "" + Letters.BACKSLASH + userSettings.rument;
}
}
}
outputStream.write(content);
if (textQualify) {
outputStream.write(userSettings.TextQualifier);
}
firstColumn = false;
}
/**
* Writes another column of data to this record. Does not preserve
* leading and trailing whitespace in this column of data.
*
* @param content
* The data for the new column.
* @exception IOException
* Thrown if an error occurs while writing data to the
* destination stream.
*/
public void write(String content) throws IOException {
write(content, false);
}
public void writeComment(String commentText) throws IOException {
checkClosed();
checkInit();
outputStream.write(userSettings.rument);
outputStream.write(commentText);
if (useCustomRecordDelimiter) {
outputStream.write(userSettings.RecordDelimiter);
} else {
outputStream.println();
}
firstColumn = true;
}
/**
* Writes a new record using the passed in array of values.
*
* @param values
* Values to be written.
*
* @param preserveSpaces
* Whether to preserver leading and trailing spaces in columns
* while writing out to the record or not.
*
* @throws IOException
* Thrown if an error occurs while writing data to the
* destination stream.
*/
public void writeRecord(String[] values, boolean preserveSpaces)
throws IOException {
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
write(values[i], preserveSpaces);
}
endRecord();
}
}
/**
* Writes a new record using the passed in array of values.
*
* @param values
* Values to be written.
*
* @throws IOException
* Thrown if an error occurs while writing data to the
* destination stream.
*/
public void writeRecord(String[] values) throws IOException {
writeRecord(values, false);
}
/**
* Ends the current record by sending the record delimiter.
*
* @exception IOException
* Thrown if an error occurs while writing data to the
* destination stream.
*/
public void endRecord() throws IOException {
checkClosed();
checkInit();
if (useCustomRecordDelimiter) {
outputStream.write(userSettings.RecordDelimiter);
} else {
outputStream.println();
}
firstColumn = true;
}
/**
*
*/
private void checkInit() throws IOException {
if (!initialized) {
if (fileName != null) {
outputStream = new PrintWriter(new OutputStreamWriter(
new FileOutputStream(fileName), charset));
}
initialized = true;
}
}
/**
* Clears all buffers for the current writer and causes any buffered data to
* be written to the underlying device.
*/
public void flush() {
outputStream.flush();
}
/**
* Closes and releases all related resources.
*/
public void close() {
if (!closed) {
close(true);
closed = true;
}
}
/**
*
*/
private void close(boolean closing) {
if (!closed) {
if (closing) {
charset = null;
}
try {
if (initialized) {
outputStream.close();
}
} catch (Exception e) {
// just eat the exception
}
outputStream = null;
closed = true;
}
}
/**
*
*/
private void checkClosed() throws IOException {
if (closed) {
throw new IOException(
"This instance of the CsvWriter class has already been closed.");
}
}
/**
*
*/
protected void finalize() {
close(false);
}
private class Letters {
public static final char LF = "\n";
public static final char CR = "\r";
public static final char QUOTE = """;
public static final char COMMA = ",";
public static final char SPACE = " ";
public static final char TAB = "\t";
public static final char POUND = "#";
public static final char BACKSLASH = "\\";
public static final char NULL = "\0";
}
private class UserSettings {
// having these as publicly accessible members will prevent
// the overhead of the method call that exists on properties
public char TextQualifier;
public boolean UseTextQualifier;
public char Delimiter;
public char RecordDelimiter;
public char Comment;
public int EscapeMode;
public boolean ForceQualifier;
public UserSettings() {
TextQualifier = Letters.QUOTE;
UseTextQualifier = true;
Delimiter = Letters.ruMA;
RecordDelimiter = Letters.NULL;
Comment = Letters.POUND;
EscapeMode = ESCAPE_MODE_DOUBLED;
ForceQualifier = false;
}
}
public static String replace(String original, String pattern, String replace) {
final int len = pattern.length();
int found = original.indexOf(pattern);
if (found > -1) {
StringBuffer sb = new StringBuffer();
int start = 0;
while (found != -1) {
sb.append(original.substring(start, found));
sb.append(replace);
start = found + len;
found = original.indexOf(pattern, start);
}
sb.append(original.substring(start));
return sb.toString();
} else {
return original;
}
}
}
