Java/JSP/XML
Содержание
- 1 Deal With XML In JSP
- 2 JSP and SAX
- 3 JSP Displaying a Subset in XML
- 4 JSP in pure XML generating conforming XHTML
- 5 JSP List of data in the XML document
- 6 JSP Parsing using JDOM
- 7 JSP Parsing using the DOM
- 8 JSP Parsing using the DOM and JSTL
- 9 JSP XML and XSLT transform
- 10 Performing XSL Transformations
- 11 Using the Core XML tags
- 12 XML transformation
- 13 XSLT In JSP
- 14 XSLT in JSP 2
Deal With XML In JSP
JSP and SAX
<%@ page import="javax.xml.parsers.SAXParserFactory,
javax.xml.parsers.SAXParser,
com.jexp.MyHandler"%>
<html>
<head><title>JSP and SAX</title></head>
<body>
<%
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
MyHandler myHandler = new MyHandler(out);
parser.parse("http://localhost:8080/chapter10/people.xml",
myHandler);
%>
</body>
</html>
package com.jexp;
import java.io.IOException;
import javax.servlet.jsp.JspWriter;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class MyHandler extends DefaultHandler
{
private int stepCount, totalAge;
private JspWriter out;
private boolean insideAgeElement;
public MyHandler(JspWriter out)
{
this.out = out;
}
public void startDocument() throws SAXException
{
try
{
out.write(++stepCount + ". Start of document<br>");
}
catch (IOException e)
{
throw new SAXException(e);
}
} // end of startDocument()
public void endDocument() throws SAXException
{
try
{
out.write(++stepCount + ". End of document<p>");
out.write("The total of all ages in the XML document is <b><i>"
+ totalAge + "</i></b>");
}
catch (IOException e)
{
throw new SAXException(e);
}
} // end of endDocument()
public void startElement(String namespaceURI, String localName,
String qName, Attributes attrs)
throws SAXException
{
if ( qName.equals("age"))
{
insideAgeElement = true;
}
try
{
out.write(++stepCount + ". Start of element: <b>" + qName + "</b>");
int numberOfAttributes = attrs.getLength();
if ( numberOfAttributes > 0 )
{
out.write(". Attributes: <ul>");
} // end of if ()
else
out.write("<br>");
for ( int i=0; i<numberOfAttributes; i++)
{
out.write("<li>" + attrs.getQName(i) + " = "
+ attrs.getValue(i) + "</li>");
} // end of for ()
if ( numberOfAttributes > 0 )
{
out.write("</ul>");
}
}
catch (IOException e)
{
throw new SAXException(e);
}
} // end of startElement()
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException
{
if ( qName.equals("age") )
{
insideAgeElement = false;
}
try
{
out.write(++stepCount + ". End of element <b>" + qName + "</b><br>");
}
catch (IOException e)
{
throw new SAXException(e);
} // end of try-catch
} // end of endElement()
public void characters(char[] chars, int start, int length) throws SAXException
{
String content = new String(chars, start, length);
if ( insideAgeElement )
{
int age = Integer.parseInt(content);
totalAge += age;
}
try
{
out.write(++stepCount + ". Character content = ");
if ( length > 0 )
out.write("<b>" + content + "</b><br>");
}
catch (IOException e)
{
throw new SAXException(e);
} // end of try-catch
} // end of characters()
} // end of class MyHandler
JSP Displaying a Subset in XML
/*
<people>
<person>
<name>Peter</name>
<age>54</age>
</person>
<person>
<name>Patricia</name>
<age>50</age>
</person>
</people>
*/
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html >
<head>
<title>Displaying a Subset</title>
</head>
<body>
<c:import url="http://localhost:8080/chapter02/people.xml"
var="inputDoc" />
<x:parse xml = "${inputDoc}"
var = "parsedDoc" />
Here is a list of people over the age of 45:
<ul>
<x:forEach select="$parsedDoc/people/person/name[../age > 45]"
var="currentName" >
<li><x:out select="." />
</x:forEach>
</ul>
</body>
</html>
JSP in pure XML generating conforming XHTML
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 AUTHOR 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 AUTHOR 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.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
<?xml version="1.0"?>
<jsp:root xmlns:jsp="http://java.sun.ru/JSP/Page" version="1.2">
<jsp:directive.page contentType="text/html"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>
<html>
<head>
<title>JSP in pure XML generating conforming XHTML</title>
<meta name="version"
content="$Id: hello-xml.jsp,v 1.3 2003/08/23 01:48:21 ian Exp $" />
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body>
<h1>Hello</h1>
<p>Here on our farm <font color="green">
it is now <jsp:expression> new java.util.Date() </jsp:expression>.</font>
</p>
</body>
</html>
</jsp:root>
JSP List of data in the XML document
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:template match="people">
<h1>List of people in the XML document</h1>
<table border="1">
<th>Name</th><th>Age</th>
<xsl:apply-templates />
</table>
</xsl:template>
<xsl:template match="person">
<tr>
<td><xsl:value-of select="name/text()" /></td>
<td><xsl:value-of select="age/text()" /></td>
</tr>
</xsl:template>
</xsl:transform>
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head>
<title>Transforming a Subset</title>
</head>
<body>
<c:import url="http://localhost:8080/chapter12/Multi-Template/people.xml"
var="inputDoc" />
<c:import url="http://localhost:8080/chapter12/Multi-Template/transform.xsl"
var="stylesheet" />
<x:parse xml = "${inputDoc}"
var = "parsedDoc" />
<x:set select = "$parsedDoc/people/person/name[../age > 50]"
var = "subset" />
<x:transform xml = "${subset}"
xslt = "${stylesheet}" />
</body>
</html>
JSP Parsing using JDOM
/*
<people>
<person>
<name>Joe</name>
<age>30</age>
</person>
<person>
<name>Rob</name>
<age>29</age>
</person>
</people>
*/
<%@ page import="org.jdom.Element,
org.jdom.Document,
org.jdom.input.SAXBuilder,
java.util.List,
java.util.Iterator"
%>
<!-- remember to change the url of the xml file-->
<%
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build("http://localhost:8080/chapter11/people.xml");
List children = doc.getRootElement().getChildren(); // 2 person nodes
Iterator iter = children.iterator();
%>
<html>
<head><title>Parsing using JDOM</title></head>
<body>
<h1>List of people</h1>
<table border="1">
<tr><th>Name</th><th>Age</th></tr>
<%
while (iter.hasNext()) // for each "person" node
{
Element currentItem = (Element) iter.next(); // each "person"
List nameAndAge = currentItem.getChildren();
Iterator nameAgeIter = nameAndAge.iterator();
%>
<tr>
<%
while ( nameAgeIter.hasNext() )
{
Element child = (Element) nameAgeIter.next(); // "name" or "age"
%>
<td><%= child.getText() %></td>
<%
}
}
%>
</tr>
</table>
</body>
</html>
JSP Parsing using the DOM
/*
<people>
<person>
<name>Joe</name>
<age>30</age>
</person>
<person>
<name>Rob</name>
<age>29</age>
</person>
</people>
*/
<%@page import="org.w3c.dom.Node, org.w3c.dom.Element, org.w3c.dom.Document, org.w3c.dom.NodeList, javax.xml.parsers.DocumentBuilder, javax.xml.parsers.DocumentBuilderFactory" %>
<%!
public boolean isTextNode(Node n)
{
return n.getNodeName().equals("#text");
}
%>
<html>
<head><title>Parsing using the DOM</title></head>
<body>
<%
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse("http://localhost:8080/chapter02/people.xml");
%>
<h1>List of people</h1>
<table border="1">
<tr><th>Name</th><th>Age</th></tr>
<%
Element root = doc.getDocumentElement(); // "people" node
NodeList personNodes = root.getChildNodes(); // 2 "person" nodes
for (int i=0; i<personNodes.getLength(); i++)
{
Node currentPerson = personNodes.item(i);
if (isTextNode(currentPerson)) // skip whitespace node
continue;
NodeList nameAndAge = currentPerson.getChildNodes(); // "name" and "age" nodes
%>
<tr>
<%
for (int j=0; j<nameAndAge.getLength(); j++ )
{
Node currentItem = nameAndAge.item(j);
if ( isTextNode(currentItem))
continue;
%>
<td><%= currentItem.getFirstChild().getNodeValue() %></td>
<%
} // end of name & age loop
%>
</tr>
<%
} // end person loop
%>
</table>
</body>
</html>
JSP Parsing using the DOM and JSTL
/*
<people>
<person>
<name>Joe</name>
<age>30</age>
</person>
<person>
<name>Rob</name>
<age>29</age>
</person>
</people>
*/
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head><title>Parsing using the DOM and JSTL</title></head>
<body>
<c:import url="http://localhost:8080/chapter11/people.xml"
var="personXml" />
<x:parse xml="${personXml}" varDom="parsedXml" />
<h1>List of people</h1>
<table border="1">
<tr><th>Name</th><th>Age</th></tr>
<x:forEach select="$parsedXml/people/person" var="currentPerson">
<tr>
<x:forEach select="*">
<td><x:out select="." /></td>
</x:forEach>
</tr>
</x:forEach>
</table>
</body>
</html>
JSP XML and XSLT transform
/*
<people>
<person>
<name>Peter</name>
<age>54</age>
</person>
<person>
<name>Patricia</name>
<age>50</age>
</person>
</people>
*/
//globalParam.xsl
/*
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:param name="ageParam">60</xsl:param>
<xsl:template match="people">
<h1>List of people in the XML document</h1>
<table border="1">
<th>Name</th><th>Age</th>
<xsl:apply-templates />
</table>
</xsl:template>
<xsl:template match="person">
<xsl:call-template name="processPerson">
<xsl:with-param name="ageParam">
51
</xsl:with-param>
</xsl:call-template>
</xsl:template>
<xsl:template name="processPerson">
<!-- <xsl:param name="ageParam" /> -->
<tr>
<td>
<xsl:value-of select="name/text()" />
</td>
<td>
<xsl:value-of select="age/text()" />
<xsl:if test="age/text() > $ageParam">
(old!)
</xsl:if>
</td>
</tr>
</xsl:template>
</xsl:transform>
*/
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html >
<head>
<title>Using a Named Template with Global Parameters</title>
</head>
<body>
<c:import url="http://localhost:8080/chapter02/people.xml"
var="inputDoc" />
<c:import url="http://localhost:8080/chapter02/globalParam.xsl"
var="stylesheet" />
<x:transform xml = "${inputDoc}"
xslt = "${stylesheet}">
<x:param name="ageParam" value="49" />
</x:transform>
</body>
</html>
Performing XSL Transformations
<%@ page language="java" contentType="text/html" %>
<%@ page pageEncoding="UTF-8"%>
<%@ page import="javax.xml.transform.*"%>
<%@ page import="javax.xml.transform.stream.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Customer Orders</title>
</head>
<body>
<h1>Customer Orders</h1>
<%! String FS = System.getProperty("file.separator"); %>
<%
String xmlFile = request.getParameter("XML");
String xslFile = request.getParameter("XSL");
String ctx = getServletContext().getRealPath("") + FS;
xslFile = ctx + xslFile;
xmlFile = ctx + xmlFile;
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer(new StreamSource(xslFile));
transformer.transform(new StreamSource(xmlFile), new StreamResult(out));
%>
</body>
</html>
Using the Core XML tags
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head><title>Using the Core XML tags</title></head>
<body>
<h2>Here are the context-params and servlets from the XML file</h2>
<c:import url="http://localhost:8080/home/web.xml" var="webXml" />
<x:parse xml="${webXml}" var="doc" />
<h3>First the context params...</h3>
<x:forEach select="$doc//context-param">
<x:out select="param-name"/>: <x:out select="param-value"/>
</x:forEach>
<h3>Now the servlet info...</h3>
<x:forEach select="$doc//servlet>
<x:out select="servlet-name"/><br />
<x:out select="servlet-class"/><br /><br />
</x:forEach>
</body>
</html>
XML transformation
<%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<c:import url="http://localhost:8080/home/build.xml" var="buildXml" />
<c:import url="/WEB-INF/xslt/myTrans.xsl" var="xslt" />
<x:transform xml="${buildXml}" xslt="${xslt}" />
//myTrans.xsl
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html"/>
<xsl:template match="/">
<html><head><title>List of build.xml targets
</title></head><body bgcolor="white"><h2>Build.xml targets</h2>
<xsl:apply-templates />
</body></html>
</xsl:template>
<xsl:template match="/project">
<dl>
<xsl:for-each select="./target">
<dt><b><xsl:value-of select="@name" /></b> </dt>
<xsl:if test="@depends">
<dd>depends=<xsl:value-of select="@depends" /> </dd></xsl:if>
</xsl:for-each><!--end for-each contact -->
</dl>
</xsl:template>
<xsl:template match="text()">
<xsl:value-of select="normalize-space()" />
</xsl:template>
</xsl:stylesheet>
XSLT In JSP
/*
Java, XML, and Web Services Bible
Mike Jasnowski
ISBN: 0-7645-4847-6
*/
<HTML>
<H1> Enter card Info</H1>
<FORM NAME="CARDINFO" ACTION="/test/svgcard/process.jsp" TARGET="VIEWCARD">
<TABLE BORDER="0" CELLPADDING="4" CELLSPACING="2">
<TR><TD>Card To:</TD><TD><INPUT TYPE="TEXT" SIZE="20" NAME="cardto"></TD></TR>
<TR><TD>Card From:</TD><TD><INPUT TYPE="TEXT" SIZE="20" NAME="cardfrom"></TD></TR>
<TR><TD>Message:</TD><TD><INPUT TYPE="TEXT" SIZE="60" NAME="message"></TD></TR>
<TR><TD COLSPAN="2"> </TD></TR>
<TR><TD><INPUT TYPE="SUBMIT" VALUE="PREVIEW"></TD><TD> </TD>
</TABLE>
</FORM>
</HTML>
<%@ page contentType="image/svg-xml" %>
<%
String cardTo = request.getParameter("cardto");
String cardFrom = request.getParameter("cardfrom");
String message = request.getParameter("message");
%>
<svg width="400" height="200">
<g style="font-family:Arial;font-size:12pt;">
<text x="10" y="20">
<%= cardTo %>, someone has sent you a message
</text>
<text x="10" y="60">
<%= cardFrom %> would like to tell you
</text>
<text x="10" y="140">
<%= message %>
</text>
</g>
</svg>
XSLT in JSP 2
/*
Java, XML, and Web Services Bible
Mike Jasnowski
ISBN: 0-7645-4847-6
*/
<%@ page contentType="image/svg-xml" %>
<%@ page import="org.xml.sax.*" %>
<%@ page import="org.apache.xalan.xslt.*" %>
<%@ page import="java.io.*" %>
<%
try {
XSLTProcessor processor = XSLTProcessorFactory.getProcessor();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
processor.process(new XSLTInputSource("games.xml"),
new XSLTInputSource("games.xsl"),
new XSLTResultTarget(bos));
out.println(bos);
} catch (Exception ex) {
out.println(ex);
}
%>
<?xml version="1.0"?>
<games>
<game genre="rpg">XML Invaders</game>
<game genre="rpg">A Node in the XPath</game>
<game genre="rpg">XPath Racers</game>
</games>
//games.xsl
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html"/>
<xsl:template match="/">
<svg width="200" height="200">
<g>
<xsl:for-each select="games/game">
<text x="10" y="{number(10)*position()}">
<xsl:value-of select="text()"/>
</text>
</xsl:for-each>
</g>
</svg>
</xsl:template>
</xsl:stylesheet>
