ajax请求问题，到底哪里错了

Question

$(function(){

alert("预加载...");
$("#addTask").click(function(){
$.ajax({
type: "POST",
url: "yujiazaiSelectTask.action?taskType=NYGRADE",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(jsonStr){
alert(jsonStr);

              }
        });
    });
}); 

Answer 1

楼主试试：
----Struts2
//将json数据写入返回到客户端页面
HttpServletResponse httpServletResponse = ServletActionContext.getResponse();
httpServletResponse.setCharacterEncoding("UTF-8");
httpServletResponse.setContentType("text/x-json;charset=UTF-8");
PrintWriter pw = httpServletResponse.getWriter();
pw.print(jsonStr);