异步 json的使用

列1:通过id查询显示数据

$(".viewUser").click(function () {
    var id=$(this).attr("userid");
    alert(id)
    $.ajax({
        type:"get",
     //这里用到了restful风格
        url:"/jsp/view/"+id,
     //返回一个json对象
        dataType:"json",
        success:function (result) {
        //这里的result是User对象,传过来一个对象,通过id拿到jsp页面,传入值
            $("#userCode").html(result.userCode)
            $("#userName").html(result.userName)
            $("#gender").html(result.gender)
            $("#birthday").html(result.birthday)
            $("#phone").html(result.phone)
            $("#address").html(result.address)
            $("#userRoleName").html(result.userRoleName)
        },
        error:function () {
            alert("error!")
        }
    })
})

 

controller代码

 1    @RequestMapping(value = "/jsp/view/{id}",method = RequestMethod.GET)
 2       @ResponseBody
 3     //pathVariable接受外面的传过来的值,并且拼在路径的后面不会有?问号
 4       public Object view(@PathVariable("id") String id){
 5           System.out.println(id);
 6        //进行筛选的操作
 7           User user = userService.getUserById(id);
 8           if(user!=null){
 9        //返回一个json对象
10               return JSONArray.toJSONString(user);
11           }else{
12               return JSONArray.toJSONString(new User());
13          }
14      }

效果图:

 

 

 

 

 

 

 

 

 

 

列2:通过id删除,无刷新页面

 1 $(".deleteUser").click(function () {
 2     var id=$(this).attr("userid");
 3     var tr=$(this)
 4     $.ajax({
 5         type:"get",
 6         url:"/jsp/delete/"+id,
 7         dataType:"json",
 8         success:function (resutl) {
 9             if(resutl.boolean=="true"){
10                 tr.parents("tr").remove();
11             }else{
12                 alert("删除失败!")
13             }
14 
15         },
16         error:function () {
17             alert("error!")
18         }
19 
20     })
21 })
 1 @RequestMapping(value = "/jsp/delete/{id}",method = RequestMethod.GET)
 2      //@ResponseBody的作用其实是将java对象转为json格式的数据,注意:在使用 @RequestMapping后
 3         @ResponseBody
 4         public String delUser(@PathVariable("id") Integer delId) {
 5             System.out.println("删除了Id为________:"+delId);
 6                 boolean b = userService.deleteUserById(delId);
 7                 Map<String,String> map=new HashMap<String,String>();
 8                 if (b) {
 9                     System.out.println("成功");
10             //给map设值,外面可以拿到boolean属性并且拿到value="true"进行判断
11 
12                     map.put("boolean","true");
13                     return JSONArray.toJSONString(map);
14                 }else{
15                     System.out.println("失败");
16                     map.put("boolean","false");
17                     return JSONArray.toJSONString(map);
18                 }
19 
20         }

效果图,没删除之前:

 

 

删除后:

 

 

 

@RequestMapping(value = "/jsp/delete/{id}",method = RequestMethod.GET)
@ResponseBody
public String delUser(@PathVariable("id") Integer delId) {
System.out.println("删除了Id为________:"+delId);
boolean b = userService.deleteUserById(delId);
Map<String,String> map=new HashMap<String,String>();
if (b) {
System.out.println("成功");
map.put("boolean","true");
return JSONArray.toJSONString(map);
}else{
System.out.println("失败");
map.put("boolean","false");
return JSONArray.toJSONString(map);
}

}
posted @ 2020-12-09 21:16  Kc_blog  阅读(147)  评论(1编辑  收藏  举报