本人刚开始接触springmvc，项目搭建参照https://my.oschina.net/gaussik/blog/385697。在用IDEA写登录注册的时候，想通过ajax方式提交数据到后台，然后遇到如题所述的乱码问题，然后度娘了好多，终于解决了。废话不多说，直接上代码。
首先是登录页面login.jsp
1 <%-- 2 Created by IntelliJ IDEA. 3 User: PENG027 4 Date: 2016/11/11 5 Time: 15:48 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" pageEncoding="utf-8" language="java" %> 9 <html> 10 <head> 11 <title>index</title> 12 <script type="text/javascript" src="/js/jquery.min.js"></script> 13 <script type="text/javascript"> 14 function login() { 15 var name=$("#id1").val(); 16 var pwd=$("#id2").val(); 17 $.ajax({ 18 url:'/login', 19 type:'post', 20 contentType:'application/json', 21 data:JSON.stringify({'username':name,'password':pwd}), 22 dataType:'json', 23 async:false, 24 success:function (msg) { 25 // alert("页面内容改变"); 26 // $("#p").text(msg.msg); 27 window.location.href="success.jsp?>Math.random(); 28 }, 29 error:function () { 30 alert("failure"); 31 } 32 }); 33 } 34 </script> 35 </head> 36 <body> 37 <form> 38 username:<input /><br> 39 password:<input /><br> 40 <input /><br> 41 <%--<p >点击登录之后我会改变</p>--%> 42 </form> 43 </body> 44 </html>