spring-beans下的BeanUtils.copyProperties

引入spring-beans的依赖，其版本为5.3.3

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>5.3.3</version>
</dependency>

第一种使用用法： BeanUtils.copyProperties(A, B, new String[]{"id","age"})

将A的属性全部拷贝到B中，但是属性字段id和age将会被忽略掉，不进行属性值拷贝

构建的实体类：

import lombok.Data;
import java.util.Date;

@Data
public class TbUser{

    private Integer id;

    private String name;

    private Integer age;

    private Date createTime;

    public TbUser(Integer id, String name, Integer age, Date createTime) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.createTime = createTime;
    }
}

 构建的VO传输对象：

import lombok.Data;

@Data
public class UserVo {
    private Integer id;
    private String name;
    private Integer age;
}

测试类：

TbUser user = new TbUser(2,"Morris", 5, new Date());
UserVo userVo=new UserVo();
BeanUtils.copyProperties(user,userVo,"id","age");
System.out.println(userVo);

输出结果：

UserVo(id=null, name=Morris, age=null)