springmvc注解RequestBody和ResponseBody

程序员文章站 2022-07-12 19:18:23

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@responseBody将后台pojo转换json对象，返回到页面。
@RequestBody接受前台json数据，将json数据自动封装javaBean。

需要导入对json数据转换所依赖的jar,否则会找不到请求的方法
springmvc注解RequestBody和ResponseBody

1.页面传递json格式数据

后台方法

@RequestMapping("requestJson")
    public @ResponseBody User requestJson(@RequestBody User user){
        System.out.println(user);
        return user;
    }

页面传递参数

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ajax请求</title>

<script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-2.0.3.min.js"></script>

</head>
<body>
    <input type="button" value="请求json数据" onclick="requestJson();"/>
</body>

<script type="text/javascript">
    function requestJson(){
        var pojoJson = JSON.stringify({"id":"12","userName":"张三","age":"18"});
        var url = "${pageContext.request.contextPath }/user/requestJson.do";
        $.ajax({
            url:url,
            type:"post",
            contentType:"application/json;charset=utf-8",
            data:pojoJson,
            success:function(data){
                alert(data);
            }
        });

    }
</script>

</html>

请求过程
springmvc注解RequestBody和ResponseBody

2.页面传递普通格式数据
后台

@RequestMapping("requestPojo")
    public @ResponseBody User requestPojo(User user){
        System.out.println(user);
        return user;
    }

页面

<body>
    <input type="button" value="普通数据提交" onclick="requestPojo();"/>
</body>
<script type="text/javascript">
    function requestPojo(){
        var pojoJson = JSON.stringify({"id":"12","userName":"张三","age":"18"});
        var url = "${pageContext.request.contextPath }/user/requestPojo.do";
        $.ajax({
            url:url,
            type:"post",
            data:"id=16&userName=李四&age=19",
            success:function(data){
                alert(data);
            }
        });

    }
</script>

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