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