java 中文乱码
以我做一个例子：
总共三个文件，
1、ajax.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ajax.html</title>
<script type="text/javascript" src="jslib/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="jslib/verfy1.js"></script>
</head>
<body>
用户名检验：请输入姓名</br>
<input type="text" id="userName" />
<input type="button" value="检验" onclick="verfy()"/>
<div id="result"></div>
</body>
</html>
2、AJAXServer.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.omg.CORBA.Request;
import sun.awt.datatransfer.DataTransferer.ReencodingInputStream;
public class AJAXServer extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
Integer inte = (Integer)request.getSession().getAttribute("total");
int temp = 0;
if(inte == null){
temp = 1;
}else{
temp = inte.intValue() + 1;
}
request.getSession().setAttribute("total", temp);
String old = request.getParameter("name"); // 1、第一种方式的处理
String name = new String(old.getBytes("iso8859-1"),"utf-8"); // 第一种方式的处理
//String old = request.getParameter("name"); 第二种方法
//String userName = URLDecoder.decode(old,"utf-8"); 第二种方法
if(old == null || old.length() == 0){
out.println("用户名不能为空！！");
}else{
if(name.equals("liminghua")){
out.println("用户名【"+name+"】已存在，请使用其它名称！,"+ temp);
}else{
out.println("用户名【"+name+"】尚未存在，可以使用！,"+temp);
}
}
}catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
this.doGet(req, resp);
}
}
3、verify.js
/*
function verfy(){
$.get("AJAXServer",{name:$("#userName").val()},function(data){$("#result").html(data)});
}
*/
function verfy(){
var url = "AJAXServer?name=" + encodeURI($("#userName").val()); // 第一种方式处理结果
//var url = "AJAXServer?name=" +encodeURI(encodeURI($("#userName").val())); 第二种方法
url = convertURL(url);
$.post(url,null,function(data){$("#result").html(data)
});
}
function convertURL(url) {
var timstamp = (new Date()).valueOf();
if (url.indexOf("?") >= 0) {
url = url + "&t=" + timstamp;
} else {
url = url + "?t=" + timstamp;
}
return url;
}
解决中文乱码问题
1、页面端发送的数据作一次encodeURI，服务级使用new String(old.getBytes("iso8859-1"),"utf-8");
发送页面：（传送数据端）
encodeURI($("#userName").val());
服务器端：
String old = request.getParameter("name");
String userName= new String(old.getBytes("iso8859-1"),"utf-8");
2、页面端作两次encodeURI,服务器端URIDecoder.decode(old,"utf-8");
发送页面：（传送数据端）
encodeURI(encodeURI($("#userName").val()));
服务器端：
String old = request.getParameter("name");
String userName = URLDecoder.decode(old,"utf-8");
这是通用的两种方法，完毕
