@JsonProperty注解解析

1. 概述

来源: @JsonPrpperty是jackson包下的一个注解，详细路径(com.fasterxml.jackson.annotation.JsonProperty;)作用:@JsonProperty用在属性上，将属性名称序列化为另一个名称。例子：public class Person{@JsonProperty(value = "name")private String realName;}

拓展：jackson可以理解为java对象和json对象进行转化的工具包。

2. 实例

解释：定义一个实体类，定义一个Controller层，通过post请求传入body,分别验证加和不加@JsonProperty注解的区别。

2.1 引入依赖

<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId>
</dependency>

2.2 创建实体类

package com.gxn.demo.domain;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.Objects;public class Person {
//  先将该注解注释掉
//  @JsonProperty(value = "name")private String realName;private Integer age;@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;Person person = (Person) o;return Objects.equals(realName, person.realName) &&Objects.equals(age, person.age);}@Overridepublic int hashCode() {return Objects.hash(realName, age);}public String getRealName() {return realName;}public void setRealName(String realName) {this.realName = realName;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}

2.3 定义Controller，返回结果是realName和age的值

package com.gxn.demo.controller;import com.gxn.demo.domain.Person;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;@RestController
public class PersonController {@PostMapping("/name")public String getName(@RequestBody Person person) {String name = person.getRealName();Integer age = person.getAge();String res = name + " : " + age;return res;}}