SpringMVC与Jason联用自动封装

1.导入坐标

 <properties>
     ```
    <spring.version>5.0.2.RELEASE</spring.version>
    
  </properties>
  
 <dependencies>
    <dependency>
      <!--jason包-->
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.0</version>
    </dependency>
    <!--jason包-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
  </dependencies>

2.在一个按钮上或者form表单上提交ajax请求

需要jQuery

        $(function () {
           $("#btnAjax").click(function () {
               $.ajax({
                   url: "view/testAjaxAndJason",
                   data: JSON.stringify({
                       "name": "zs",
                       "age": 18
                   }),
                   type: "post",
                   dataType: 'json',
                   contentType: 'application/json',
                   success: function (res) {
                            console.log(res);
                   }
               })
               });

        });

3.SpringMVC中逻辑处理

    /**
     * ajax请求必须是post请求,使用Jason包，自动把数据打入实体类
     * @param user
     */
    @RequestMapping("/testAjaxAndJason")
    public @ResponseBody User testAjaxAndJason(@RequestBody User user){
        System.out.println(user);
        /*返回值写入直接@ResponseBody，让MVC自动把user对象返回成json数据*/
        return user;
    }