JDOM读取XML，并且创建XML
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package com.brit.cx.common;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class Util {public Util() {}/** *//** * 读取源文件内容 * @param filename String 文件路径 * @throws IOException * @return byte[] 文件内容 * @throws IOException */public static byte[] readFile(String filename) throws IOException{ File file =new File(filename); if(filename==null || filename.equals("")){ throw new NullPointerException("无效的文件路径"); } long len = file.length(); byte[] bytes = new byte[(int)len]; BufferedInputStream bufferedInputStream=new BufferedInputStream(new FileInputStream(file)); int r = bufferedInputStream.read( bytes ); if (r != len) throw new IOException("读取文件不正确"); bufferedInputStream.close(); return bytes;}/** *//** * 将数据写入文件 * @param data byte[] * @throws IOException * @throws IOException */public static void writeFile(byte[] data,String filename) throws IOException{ File file =new File(filename); file.getParentFile().mkdirs(); BufferedOutputStream bufferedOutputStream=new BufferedOutputStream(new FileOutputStream(file)); bufferedOutputStream.write(data); bufferedOutputStream.close();}/** *//** * 从jar文件里读取class * @param filename String * @throws IOException * @return byte[] * @throws IOException */public byte[] readFileJar(String filename) throws IOException{ BufferedInputStream bufferedInputStream=new BufferedInputStream(getClass().getResource(filename).openStream()); int len=bufferedInputStream.available(); byte[] bytes=new byte[len]; int r=bufferedInputStream.read(bytes); if(len!=r){ bytes=null; throw new IOException("读取文件不正确"); } bufferedInputStream.close(); return bytes;}/** *//** * 读取网络流，为了防止中文的问题，在读取过程中没有进行编码转换，而且采取了动态的byte[]的方式获得所有的 byte返回 * @param bufferedInputStream BufferedInputStream * @throws IOException * @return byte[] * @throws IOException */public byte[] readUrlStream(BufferedInputStream bufferedInputStream) throws IOException{ byte[] bytes = new byte[100]; byte[] bytecount=null; int n=0; int ilength=0; while((n=bufferedInputStream.read(bytes))>=0){ if(bytecount!=null) ilength=bytecount.length; byte[] tempbyte=new byte[ilength+n]; if(bytecount!=null){ System.arraycopy(bytecount,0,tempbyte,0,ilength); } System.arraycopy(bytes,0,tempbyte,ilength,n); bytecount=tempbyte; if(n<bytes.length) break; } return bytecount;}}?
附件里有上传XML和 JDOM解析和创建XML的例子
