jquery 跨域访问问题 转

<%@ 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);
%>

<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>