Ajax post 传递中文时乱码问题解决方法 .

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1、//传值给servlet时

var inputOneObj=document.getElementById('input_user');
  var inputTwoObj=document.getElementById('input_cadno');
   var inputThrObj=document.getElementById('input_pas');
   var name=inputOneObj.value;
   var id=inputTwoObj.value;
   var pasd=inputThrObj.value;

var post="username="+name+"&cardno="+id+"&password="+pasd;

//post一定要编码两次

post=encodeURI(post);
post=encodeURI(post);
   var url="GuashiSevlet";

   xmlHttp.open("POST",url, true);
   xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
   xmlHttp.send(post);

//servlet获取提交的数据，并解码

String usernm0 = request.getParameter("username");
String usernm = URLDecoder.decode(usernm0,"UTF-8");
String pass = request.getParameter("password");
String cardnum = request.getParameter("cardno");

2、//servlet 传中文给jsp页面时乱码

在servlet中添加下面语句

request.setContentType("text/html ; charset=gb2312");
request.setCharacterEncoding("gb2312");

//jsp页面
<%page language="java" import="java.util.*" pageEncoding="gb2312"%>