奇怪的乱码问题

Question

System.out.println("1:"+msg);
System.out.println("2:"+new String(msg.getBytes()));
System.out.println("31:"+new String(msg.getBytes(),"GBK"));
System.out.println("32:"+new String(msg.getBytes(),"GB2312"));
System.out.println("4:"+new String(msg.getBytes(),"UTF8"));
System.out.println("5:"+new String(msg.getBytes(),"ISO-8859-1"));
System.out.println("6:"+new String(msg.getBytes("GB2312")));
System.out.println("7:"+new String(msg.getBytes("GB2312"),"utf8"));
System.out.println("8:"+new String(msg.getBytes("GB2312"),"GBK"));
System.out.println("9:"+new String(msg.getBytes("GB2312"),"ISO-8859-1"));
System.out.println("10:"+new String(msg.getBytes("ISO-8859-1")));
System.out.println("11:"+new String(msg.getBytes("ISO-8859-1"),"GB2312"));
System.out.println("12:"+new String(msg.getBytes("iso-8859-1"),"gbk"));
System.out.println("13:"+new String(msg.getBytes("iso-8859-1"),"utf8"));
System.out.println("14:"+new String(msg.getBytes("utf-8")));
System.out.println("15:"+new String(msg.getBytes("UTF-8"),"GBK"));
System.out.println("16:"+new String(msg.getBytes("utf-8"),"gb2312"));
System.out.println("17:"+new String(msg.getBytes("UTF-8"),"ISO-8859-1"));
System.out.println("18:"+new String(msg.getBytes("GBK")));
System.out.println("19:"+new String(msg.getBytes("GBK"),"utf8"));
System.out.println("20:"+new String(msg.getBytes("GBK"),"GB2312"));
System.out.println("21:"+new String(msg.getBytes("GBK"),"ISO-8859-1"));---==1:?? ??? ???????
2:?? ??? ???????
31:?? ??? ???????
32:?? ??? ???????
4:?? ??? ???????
5:?? ??? ???????
6:?? ??? ???????
7:?? ??? ???????
8:?? ??? ???????
9:?? ??? ???????
10:?? ??? ???????
11:?? ??? ???????
12:?? ??? ???????
13:?? ??? ???????
14:锟斤拷 锟斤拷锟? 说锟斤拷????
15:锟斤拷 锟斤拷锟? 说锟斤拷????
16:锟斤拷 锟斤拷锟? 说锟斤拷????
17:?????? ????????? ????????????
18:?? ??? ???????
19:?? ??? ???????
20:?? ??? ???????
21:?? ??? ???????

Answer 1

你的msg输出的时候都是乱码了，好好检查下吧

Answer 2

问题找到了：新作的这个JSP所在的应用已经做了过滤器，全部的请求都自动转码为:UTF8。把JPS拿出来单独做了个应用就好了。奇怪的是原来的JAVA代码是好使的。

Answer 3

乱码的原因很多的,可能在传输前也可能在你输出时
举个例子吧:
假如你在jsp中这样做pageEncoding="ISO-8859-1",那么你的浏览器会以ISO-8859-1方式解码,如果你传过来的是GBK编码的数据时,自然要出现乱码.如果你不指定,浏览器会自己根据你的系统本地信息自动为你选默认编码方式来解码(一般简体中文的操作系统默认编码是gb18030,繁体中文可能就是Big5了).当然造成乱码的原因很多,这只是举个最简单的例子,我不知道你的具体原因,所以爱莫能助