String Data_Path = "/storage/tmp/test.conf";

File file = new File(Data_Path);

String tmpStr = "";

FileReader reader;
BufferedReader fileStream;

if(file.exists()){
reader = new FileReader(Data_Path);
fileStream = new BufferedReader(reader);
while( null != (tmpStr = fileStream.readLine())){
tmpStr = new String(tmpStr.getBytes(), "gb2312");
System.out.println("==>" + tmpStr);
}

while( null != (tmpStr = fileStream.readLine())){
tmpStr = new String(tmpStr.getBytes("iso-8859-1"), "gb2312");
System.out.println("==>" + tmpStr);
}

while( null != (tmpStr = fileStream.readLine())){
System.out.println("==>" + tmpStr);
}

------解决方案--------------------
xp上没发现这个问题

------解决方案--------------------
可以改变一下文件方式，下面的方法是替换文本文件中指定的字符串
	public static boolean replaceFileContent(File file,String charsetName,String oldChar,String newChar){
		
		BufferedReader in = null;
		BufferedWriter out = null;
		File tempFile =  new File(file.getParentFile().getPath()+File.separator+"_"+file.getName());
		try {
			in = new BufferedReader(new InputStreamReader(new FileInputStream(file),charsetName));
			out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(tempFile),charsetName));
			String s;
			while((s = in.readLine())!=null){
				if(s.indexOf(oldChar)>=0){
					s = s.substring(0,s.indexOf(oldChar))+newChar+s.substring(s.indexOf(oldChar)+oldChar.length());
				}
				out.write(s);
				out.newLine();
			}
           out.flush();
           out.close();
           in.close();
           file.delete();
           tempFile.renameTo(file);
			
		} catch (Exception e) {
			return false;
		}finally{
       	try{
       		if(in!=null){
           		in.close();
           	}
       		if(out!=null){
       			out.close();
           	}
       	}catch (Exception e) {
       		logger.error("关闭文件失败："+e.getMessage());
       		return false;
			}
       }
		return true;
	}

replaceFileContent(new File("E:\\Templete\\Templete171\\html\\index.html"),"gb2312","${playlist_xml_path}","/test/dd/playList.xml");

------解决方案--------------------
生成图片验证码jsp出现getOutputStream()

------解决方案--------------------
你是不是应该用tmpStr.getBytes(Charset charset)啊，
在String转Byte的时候也是需要编码的

------解决方案--------------------
Java code

tmpStr = new String(tmpStr.getBytes("所读取文件的编码格式"), "工程java文件的编码格式");

------解决方案--------------------
貌似配置文件里面也要改吧web.xml

------解决方案--------------------
我感觉乱码是你的读取有问题 也就是你读的内容有问题 没有完整的读入一行字符 所在解析成乱码

------解决方案--------------------