Java：Bean实体对象和Map互相转换
本文介绍Java的Bean实体对象和Map互相转换的几种方法
目录
- 方式一：Hutool工具类
- 方式二：Jackson库
- 参考
测试用到的实体类
@Data
class Person {private String name;private Integer age;
}
方式一：Hutool工具类
依赖
<!-- hutool -->
<dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.4.6</version>
</dependency>
引入工具类
import cn.hutool.core.bean.BeanUtil;
对象转换为Map
Person person = new Person();
person.setName("Alice");
person.setAge(30);// 对象转换为Map
Map<String, Object> map = BeanUtil.beanToMap(person);System.out.println(map);
// 输出：{name=Alice, age=30}
Map转换为对象
Map<String, Object> map = new HashMap<>();
map.put("name", "Alice");
map.put("age", 30);// Map转换为对象
Person person = BeanUtil.mapToBean(map, Person.class, true, null);System.out.println(person);
// 输出：Person(name=Alice, age=30)
方式二：Jackson库
依赖
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.13.4</version>
</dependency>
import com.fasterxml.jackson.databind.ObjectMapper;
对象转换为Map
Person person = new Person();
person.setName("Alice");
person.setAge(30);ObjectMapper objectMapper = new ObjectMapper();// 对象转换为Map
Map<String, Object> personMap = objectMapper.convertValue(person, Map.class);
System.out.println(personMap);
// 输出：{name=Alice, age=30}
Map转换为对象
Map<String, Object> map = new HashMap<>();
map.put("name", "Alice");
map.put("age", 30);ObjectMapper objectMapper = new ObjectMapper();// Map转换为对象
Person person = objectMapper.convertValue(map, Person.class);
System.out.println(person);
// 输出：Person(name=Alice, age=30)
参考
1、java中对象和Map互相转换的几种方式