Java/File Input Output/OutputStreamWriter

new OutputStreamWriter(fos, "UTF8")

 
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 * Copyright (c) 1995 - 2008 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.
 *
 *   - 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.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * 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.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Insets;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
class ShowString extends Frame {
  FontMetrics fontM;
  String outString;
  ShowString(String target, String title) {
    setTitle(title);
    outString = target;
    Font font = new Font("Monospaced", Font.PLAIN, 36);
    fontM = getFontMetrics(font);
    setFont(font);
    int size = 0;
    for (int i = 0; i < outString.length(); i++) {
      size += fontM.charWidth(outString.charAt(i));
    }
    size += 24;
    setSize(size, fontM.getHeight() + 60);
    setLocation(getSize().width / 2, getSize().height / 2);
    setVisible(true);
  }
  public void paint(Graphics g) {
    Insets insets = getInsets();
    int x = insets.left;
    int y = insets.top;
    g.drawString(outString, x + 6, y + fontM.getAscent() + 14);
  }
}
public class StreamConverter {
  static void writeOutput(String str) {
    try {
      FileOutputStream fos = new FileOutputStream("test.txt");
      Writer out = new OutputStreamWriter(fos, "UTF8");
      out.write(str);
      out.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  static String readInput() {
    StringBuffer buffer = new StringBuffer();
    try {
      FileInputStream fis = new FileInputStream("test.txt");
      InputStreamReader isr = new InputStreamReader(fis, "UTF8");
      Reader in = new BufferedReader(isr);
      int ch;
      while ((ch = in.read()) > -1) {
        buffer.append((char) ch);
      }
      in.close();
      return buffer.toString();
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    }
  }
  public static void main(String[] args) {
    String jaString = new String("\u65e5\u672c\u8a9e\u6587\u5b57\u5217");
    writeOutput(jaString);
    String inputString = readInput();
    String displayString = jaString + " " + inputString;
    new ShowString(displayString, "Conversion Demo");
  }
}

Writing ISO Latin-1 Encoded Data

 
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class Main {
  public static void main(String[] argv) throws Exception {
    Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("outfilename"),
        "8859_1"));
    out.write("asdf");
    out.close();
  }
}

Writing UTF-8 Encoded Data

 
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class Main {
  public static void main(String[] argv) throws Exception {
    Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("outfilename"),
        "UTF8"));
    out.write("asdf");
    out.close();
  }
}