jquery 跨域访问问题 转

http://zld406504302.iteye.com/blog/1677937

服务器，jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
  String a ="{'name':'tom','sex':'男','age':'24'}";
  String json = request.getParameter("callback");
  json = json +"("+a+")";
  response.getWriter().write(json);
%>

js

   <script type="text/javascript">
   $(function(){
       $.ajax({ 
         async:false, 
    url: 'http://localhost:8080/ws/web/pages/data/json.jsp', 
    type: "GET", 
    dataType: 'jsonp', 
    jsonp: 'callback', 
    data: null, 
    success: function (json) {
        alert(json.name);
    }
       });
    })
   </script>