ajax GET方式提交，中文参数乱码的问题zz
最近在研究AJAX是，自己做了一个程序测试，发现在使用get方式提交时，如果参数中有中文的话，会出现乱码问题，而且取回的XMLHttpRequest.resopnseText中如果有中文，将其值在页面上显示后也是乱码。Google一下，发现大多是针对post方式提交的解决办法，
于是自己通过查看别人的文章，下来后自己调试，解决了get方式提交中文参数乱码的问题：
我的环境是表单页面index.html的编码是UTF-8:下面是我的代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Demo1.html</title>
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!-- HTTP 1.1 -->
<meta http-equiv="Cache-Control" content="no-store"/>
<!-- HTTP 1.0 -->
<meta http-equiv="Pragma" content="no-cache"/>
<!-- Prevents caching at the Proxy Server -->
<meta http-equiv="Expires" content="0"/>
<script language="javascript">
var httpRequest=null;
function createHttpRequest() {
if(window.XMLHttpRequest) {
return new XMLHttpRequest();
}
else if(window.ActiveXObject) {
request = new ActiveXObject("Microsoft.XMLHTTP");
if(!request) {
request = new ActiveXObject("Msxml2.XMLHTTP");
}
return request;
}
}
function ok() {
var url = "handel.jsp?name="+encodeURIComponent(document.form1.name.value);
httpRequest = createHttpRequest();
httpRequest.onreadystatechange = aa;
httpRequest.open("GET",url,true);
httpRequest.send(null);
}
function aa(){
if(httpRequest.readyState == 4) {
if(httpRequest.status == 200) {
document.getElementById("hh").innerText = httpRequest.responseText;
}
}
}
</script>
</head>
<body>
<form name="form1">
<input type="text" size="24" name="name">
<input type="button" value="提交" onclick="ok()"><br>
你输入了：<textarea rows="3" cols="20" readonly id="hh"></textarea>
</form>
</body>
</html>
在构造url是用javascript自带的encodeURIComponent方法将参数进行编码，下面是我的代码
var url = "handel.jsp?name="+encodeURIComponent(document.form1.name.value);
httpRequest = createHttpRequest();
httpRequest.onreadystatechange = aa;
httpRequest.open("GET",url,true);
httpRequest.send(null);
在目的地的handel.jsp页面(该页面显示编码也是UTF-8)上，先用iso-8859-1将request.getparameter()方法取回的参数值，转成字节串，
然后在用UTF-8将字节串转成字符串，就好了，下面是handel.jsp的代码：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%
String name = request.getParameter("name");
byte[] b = name.getBytes("iso-8859-1");
for(int i=0;i<b.length;i++) {
System.out.println(b[i]);
}
System.out.println("name:"+name);
System.out.println(new String(b,"UTF-8"));
response.setContentType("text/plain");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Charset","UTF-8");
out.println("Welcome "+name);
%>
为了解决返回值XMLHttpRequest.resopnseText中文乱码的问题，需要设置下面这句话：
response.setHeader("Charset","UTF-8");