jsp 解决ajax乱码的问题

<%@page import="java.io.OutputStream"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
%>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <button onclick="test()">测试</button>    
</body>

<script src="js/jquery-1.4.2.min.js"></script>
    <script>
        function test(){
            $.ajax({
                 type: "GET",
                 url: "testCookie",
                 data: {username:encodeURIComponent("燕子"), //编码content:encodeURIComponent("彩虹金刚")},
                 dataType: "json",

                 success: function(data){
                    console.log(data);
                 }
            });
        }
    </script>
</html>

服务器端

package my.jsp.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.text.MessageFormat;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyCookie extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {   
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setHeader("Content-Type", "text/html;charset=UTF-8");//响应头  这样就可以解决返回值乱码的问题

        Enumeration<String> paramNames = request.getParameterNames();// 获取所有的参数名
        while (paramNames.hasMoreElements()) {
            String name1 = paramNames.nextElement();// 得到参数名
            String value1 = request.getParameter(name1);// 通过参数名获取对应的值
            System.out.println(MessageFormat.format("{0}={1}", URLDecoder.decode(name1,"utf-8"), URLDecoder.decode(value1,"utf-8")));//解码
        }


        PrintWriter out = response.getWriter();
        out.print("蛤蛤蛤");         
        //释放资源
        out.flush();
        out.close();
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    }



}

jsp 解决ajax乱码的问题

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