为什么ie不能执行jquery.getJSON的回调函数

Question

前段
$.getJSON(urll,{ids:ids},function(json){alert(json);});});

strues
[code="java"]
response.setContentType("application/x-javascript;");
JSONObject fromObject = JSONObject.fromObject(userManagerUtil.getUserInfo("1"));
PrintWriter writer = response.getWriter();
System.out.println(fromObject);
fromObject.write(writer);
writer.close();
return null;
[/code]
火狐可以执行回调,但ie没反应,也不报错,费解

Answer 1

你的返回参数类型application/json
还有你用getJSON是不是跨域操作，如果是的话就你必需添加jsoncallback这个参数，后台使用String jsoncallback = req.getParameter("jsoncallback");
String writer = jsoncallback +"("+writer+")";
fromObject.write(writer);

具体的原理，你去查看jquery1.3的doc文档就明白了。跨域这