Ajax异步从后台取Json数据

前台JSP页面：

function doCheck(roomId,userEname,status,i){$.post("${ctx}/admin/user/docheck",{roomId:roomId,userEname:userEname,status:status,i:i},function(data){var oTxt=jQuery.parseJSON(data);alert(oTxt.msg);if(oTxt.flag=="T")$("#check"+i).hide();});}

后台JAVA：

public @ResponseBody String approveUser(HttpServletRequest request,HttpServletResponse response,@RequestParam(value="id") String id,@RequestParam(value="roomId") String roomId){JSONObject json=new JSONObject();try{roomUserManager.modfiy(id,roomId);json.put("flag", "T");json.put("msg", "审核通过");}catch(Exception ex){json.put("flag", "F");json.put("msg", "操作异常");}showJson(json, response);}

 

protected String showJson(JSONObject jvo,HttpServletResponse response){try {response.setContentType("text/html;charset=UTF-8");PrintWriter out = response.getWriter();out.print(jvo.toString());} catch (Exception e) {e.printStackTrace();}return null;}