核心提示:ajax异步加载实现局部刷新,这是用jquery进行数据交互。script type=text/ src=${pageContext.request.contextPath }/js/jquery-2...
       ajax异步加载实现局部刷新,这是用jquery进行数据交互。
<script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-2.1.0.js"></script>  
<script type="text/javascript">  
    $(function(){  
        $("#inp1").blur(function(){  
            var name=$(this).val();  
            $.ajax({  
                url:"${pageContext.request.contextPath}/demo",  
                data:{"uname":name,"upwd":"jack123","age":12},  
                cache:"false",  
                async:"true",  
                dataType:"json",  
                type:"post",  
                success:function(data){  
                  
                    if(data.flag=="1"){  
                        $("#sp").html("用户名存在");  
                    }else{  
                        $("#sp").html("");  
                    }  
                },  
                error:function(){  
                    alert("服务器端异常");  
                }  
                  
                  
                  
            });  
              
              
              
        });  
      
          
          
          
    })  
  
  
  
</script>  
  
  
<title>Insert title here</title>  
</head>  
<body>  
<input type="text" value="" id="inp1"><span id="sp"></span>  
</body>  
</html>  
jquery封装的ajax 进行数据交互, 实现异步加载
<script type="text/JavaScript" src="${pageContext.request.contextPath }/js/jquery-2.1.0.js"></script> <script type="text/javascript"> var json={ "flag":"1" }; //alert(json.flag); $(function(){ //$.get(url,data,success(data,status,xhr),dataType) $("#btn").click(function(){ $.get( "${pageContext.request.contextPath}/demo", {"uname":"jack","upwd":"123","age":12}, function(data,status){ //var data={"flag":"1"} alert(data); if(data.flag=="1"){ $("#sp").html("用户名已经被占用").css("color","red"); }else{ $("#sp").html("用户名可以使用").css("color","green"); } }, "json" ); }) }); </script> </head> <body> <input type="button" id="btn" value="$.get异步请求服务器"><span id="sp"></span> </body>



 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                 
            
                