SpringMVC中的ResponseBody和RequestBody介绍

1ResponseBody 和 RequestBody

1简介

@ResponseBody把后台pojo转换为json对象，返回到页面

@RequestBody接受前台json数据，把json数据自动封装javaBean

2案例

导包

添加json转换器

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <!--配置一个json的转换器，告诉springmvc使用jaskson来转换json-->
        <property name="messageConverters">
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
        </property>
    </bean>

写一个jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册</title>
    <script src="${pageContext.request.contextPath}/js/jquery-1.8.3.js"></script>
    <script>
        function register() {

            //表单提交
            var url = '${pageContext.request.contextPath}/stu/save.do';
            var name = $('#name').val();
            var sex = $('#sex').val();
            var jsonObj = {name:name,sex:sex}

            var parameters = JSON.stringify(jsonObj);

            console.log(jsonObj);
            console.log(parameters);
            $.ajax({
                type:'post',
                url:url,
                contentType:'application/json;charset=utf-8',
                data:parameters,
                success:function (respData) {
                    console.log(respData)
                }

            })
        }

    </script>
</head>
<body>
<%--name = oyb & sex = male = {"name":"oyb","sex":"male"}--%>
<form action="${pageContext.request.contextPath}/stu/save.do" method="post">
    用户名:<input type="text" name="name" id="name"><br>

    性别:<input type="text" name="sex" id="sex"><br>

    <input type="button" value="提交" onclick="register()">

</form>

</form>
</body>
</html>

写一个StudentController

package oyb.Controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import oyb.model.Student;


@Controller
@RequestMapping("/stu")
public class StudentController {


    @RequestMapping("/toReg")
    public  String toReg(  Student stu){
        System.out.println(stu);
        return "stu/register";
    }

    @RequestMapping("/save")
    /**
     * @RequestBody:把json数据转成模型对象
     *@ResponseBody 返回json数据，把对象转成json字符串返回客户端
     */
    public  @ResponseBody
    Student save(@RequestBody Student stu){
        System.out.println(stu);

        return stu;
    }


}

测试

SpringMVC中的ResponseBody和RequestBody介绍

1ResponseBody 和 RequestBody

1简介

2案例

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