使用BeanUtils.copyProperties复制对象的属性

POM文件的依赖

org.springframeworkspring-beans5.1.8.RELEASE



Father类 father.

import java.time.LocalDate;/*** &＃64;author MyHarpers 2020/5/14 21:50*/
public class Father {private String name;private Long age;private LocalDate birthday;private String father;public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}public Long getAge() {return age;}public void setAge(Long age) {this.age &＃61; age;}public LocalDate getBirthday() {return birthday;}public void setBirthday(LocalDate birthday) {this.birthday &＃61; birthday;}public String getFather() {return father;}public void setFather(String father) {this.father &＃61; father;}&＃64;Overridepublic String toString() {return "Father [name&＃61;" &＃43; name &＃43; ", age&＃61;" &＃43; age &＃43; ", birthday&＃61;" &＃43; birthday &＃43; ", father&＃61;" &＃43; father &＃43; "]";}
}


Son类 son.

import java.time.LocalDate;/*** &＃64;author MyHarpers 2020/5/14 21:50*/
public class Son {private String name;private Long age;private LocalDate birthday;private String son;public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}public Long getAge() {return age;}public void setAge(Long age) {this.age &＃61; age;}public LocalDate getBirthday() {return birthday;}public void setBirthday(LocalDate birthday) {this.birthday &＃61; birthday;}public String getSon() {return son;}public void setSon(String son) {this.son &＃61; son;}&＃64;Overridepublic String toString() {return "Father [name&＃61;" &＃43; name &＃43; ", age&＃61;" &＃43; age &＃43; ", birthday&＃61;" &＃43; birthday &＃43; ", son&＃61;" &＃43; son &＃43; "]";}
}

测试类Test

import org.springframework.beans.BeanUtils;import java.time.LocalDate;
import java.util.Optional;/*** &＃64;author MyHarpers 2020/5/14 21:59*/
public class Test {private static Son convertToSon(Father father) {return Optional.ofNullable(father).map(o -> {Son entity &＃61; new Son();BeanUtils.copyProperties(father, entity);return entity;}).orElseThrow(IllegalArgumentException::new);}public static void main(String[] args) {Father father &＃61; new Father();father.setAge(8L);father.setBirthday(LocalDate.now());father.setName("姓名");father.setFather("父亲");System.out.println(father);Son son &＃61; convertToSon(father);System.out.println(son);son.setSon("儿子");System.out.println(son);}
}

输出的消息

Father [name&＃61;姓名, age&＃61;8, birthday&＃61;2020-05-14, father&＃61;父亲]
Father [name&＃61;姓名, age&＃61;8, birthday&＃61;2020-05-14, son&＃61;null]
Father [name&＃61;姓名, age&＃61;8, birthday&＃61;2020-05-14, son&＃61;儿子]