ajax跨域访问

$.ajax({ ???????url:"url", ???????type:"post", ???????dataType:"jsonp", ???????jsonp:"jsoncallback", ???????jsonpCallback:"successCallback", ???????success:function(data){ ???????????alert("成功") ???????}, ???????error:function(){ ???????????alert("失败") ???????} ???})

@Controller ?public class FromData { ?????@RequestMapping("/data.do") ?????public void getData1(HttpServletRequest req,HttpServletResponse rps){ ?????????System.out.println("1111111"); ?????????String str ?= "Hello world"; ?????????JSONObject json = new JSONObject(); ?????????json.put("name", str); ?????????try { ?????????????rps.getWriter().print("successCallback("+json.toJSONString()+")"); ?????????} catch (IOException e) { ?????????????// TODO Auto-generated catch block ?????????????e.printStackTrace(); ?????????} ?????} ?}