JAVA Servlet + AJAX 乱码问题

解决JSON串乱码：

1. Java servlet代码：

.....

JSONArray reportJson = JSONArray.fromObject(reportList);

response.setContentType("application/x-json");
response.setContentType("text/json; charset=GBK"); 

response.getWriter().print(reportJson);

......

2. JSP页面头部加上： 
<%@ page contentType="text/html; charset=GBK" %>