Ajax 框架之SSM整合框架实现ajax校验_AJAX相关_

text/html;charset=UTF-8text/json;charset=UTF-8application/json;charset=UTF-8

 @ResponseBody @RequestMapping(value="queryByUser", method=RequestMethod.POST,produces="application/json;charset=UTF-8") public User queryByName(User user,HttpServletRequest request){ User u = userBiz.queryByName(user); return u; }

 function checkUser(){ var username=$("#username").val(); $.ajax({ url:"queryByUser", type:"post", data:{"username":username}, dataType:"json", success:function(data){ if (data!=null ) { $("#userSpan").text("用户名已存在"); $("#username").val(''); }else if(data==null && username !=''){ $("#userSpan").text("用户名可用"); } } }); }