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
