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1.WriteFriendsInfo °üº¬ÁËн¨xmlºÍÐ޸ģ¬É¾³ýxml½ÚµãµÄ·½·¨
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    WriteFriendsInfo ÖÐÐ޸Ľڵã²ÉÓõķ½Ê½ÊÇɾ³ý½Úµã£¬È»ºó°ÑеĽڵãд½øÈ¥¡£ÔÚ²»¶Ô¶ÁдҪÇóºÜ´óµÄÇé¿öÏ£¬ÕâÑù×ö±È½Ï¼òµ¥¡£
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   Ð´Èë´øÖÐÎÄµÄ Document µ½xmlÎı¾
            OutputFormat format = OutputFormat.createPrettyPrint();           
            format.setEncoding("UTF-8");           
            output = new XMLWriter(new FileWriter(new File("/kb2.xml")),format);
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        ÎÒÔ­À´ÊÇÕâôдµÄ£ºdocument = saxReader.read(new File("/kb2.xml"));
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             FileReader fr= new FileReader(new File("/kb2.xml"));
            document = saxReader.read(fr);
2.ReadFriendsInfo µÄ×÷ÓÃÊǶÁxmlÊý¾Ý·ÅÈë×Ô¶¨ÒåµÄÊý¾Ý½á¹¹¡£
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  package com.soulnew.netbeansmessage;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.XMLWriter;
import java.io.*;
import java.util.Iterator;
import java.util.List;
import org.dom4j.io.OutputFormat;
public class WriteFriendsInfo{
   
    String filename="/kb2.xml";
   
    public void setFilename(String filename) {
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