Spring MVC的@RequestBody接收JSON格式的数据

た入场券 2021-07-24 13:44 438阅读 0赞

**一 控制器**

package org.fkit.controller;
    
    import javax.servlet.http.HttpServletResponse;
    import org.fkit.domain.Book;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RequestMapping;
    import com.fasterxml.jackson.databind.ObjectMapper;
    
    @Controller
    @RequestMapping("/json")
    public class BookController {
        
        // @RequestBody根据json数据，转换成对应的Object
        @RequestMapping(value="/testRequestBody")
        public void setJson(@RequestBody Book book,
                HttpServletResponse response) throws Exception{
            // ObjectMapper类是Jackson库的主要类。它提供一些功能将Java对象转换成对应的JSON格式的数据
            ObjectMapper mapper = new ObjectMapper();
            // 将book对象转换成json输出
            System.out.println(mapper.writeValueAsString(book) );
            book.setAuthor("肖文吉");
            response.setContentType("text/html;charset=UTF-8");
            // 将book对象转换成json写出到客户端
            response.getWriter().println(mapper.writeValueAsString(book));
        }
    
    }

**二 视图**

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html;  charset=UTF-8">
    <title>测试接收JSON格式的数据</title>
    <script type="text/javascript"  src="js/jquery-1.11.0.min.js"></script>
    <script type="text/javascript" src="js/json2.js"></script>
    <script type="text/javascript">
    $(document).ready(function(){
         testRequestBody();
    });
    function testRequestBody(){
         $.ajax("${pageContext.request.contextPath}/json/testRequestBody",// 发送请求的URL字符串。
                    {
                    dataType : "json", // 预期服务器返回的数据类型。
                    type : "post", //  请求方式 POST或GET
                  contentType:"application/json", //  发送信息至服务器时的内容编码类型
                  // 发送到服务器的数据。
                  data:JSON.stringify({id : 1, name :  "Spring+MyBatis企业应用实战"}),
                  async:  true , // 默认设置下，所有请求均为异步请求。如果设置为false，则发送同步请求
                  // 请求成功后的回调函数。
                  success :function(data){
                       console.log(data);
                      $("#id").html(data.id);
                      $("#name").html(data.name);
                      $("#author").html(data.author);
                  },
                  // 请求出错时调用的函数
                  error:function(){
                       alert("数据发送失败");
                  }
         });
    }
    </script>
    </head>
    <body>
    编号：<span id="id"></span>
    书名：<span id="name"></span>
    作者：<span id="author"></span>
    </body>
    </html>

**三 领域模型**

package org.fkit.domain;
    import java.io.Serializable;
    
    public class Book implements Serializable {
         private static final long serialVersionUID = 1L;
         
         private Integer id;
         private String name;
         private String author;
         public Integer getId() {
               return id;
         }
         public void setId(Integer id) {
               this.id = id;
         }
         public String getName() {
               return name;
         }
         public void setName(String name) {
               this.name = name;
         }
         public String getAuthor() {
               return author;
         }
         public void setAuthor(String author) {
               this.author = author;
         }
         @Override
         public String toString() {
               return "Book [id=" + id + ", name=" + name + ",  author=" + author + "]";
         }
    }

**四 配置文件**

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:p="http://www.springframework.org/schema/p"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
         xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans
             http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd     
            http://www.springframework.org/schema/context
             http://www.springframework.org/schema/context/spring-context.xsd">
            
        
        <context:component-scan base-package="org.fkit.controller"/>
         
        <mvc:annotation-driven/>
         
        <mvc:default-servlet-handler/>
         
        
         <bean id="viewResolver"
               class="org.springframework.web.servlet.view.InternalResourceViewResolver"
              p:prefix="/WEB-INF/content/" p:suffix=".jsp"/>
        
    </beans>

**五 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/0dc185131ce14acf977b566e681d3cf7.png