使用 import org.apache.commons.beanutils.PropertyUtils; import org.springframework.beans.BeanUtils;

都是淺拷貝，BeanUtils.copyProperties提供類型轉(zhuǎn)換功能,BeanUtils會(huì)調(diào)用默認(rèn)的轉(zhuǎn)換器（Converter）進(jìn)行類型轉(zhuǎn)換，所以在拷貝時(shí)能對(duì)八個(gè)基本類型間進(jìn)行轉(zhuǎn)換，不能轉(zhuǎn)換時(shí)拋出錯(cuò)誤 ，但是類型不同時(shí)值不會(huì)被復(fù)制
PropertyUtils.copyProperties不提供類型轉(zhuǎn)換功能，即發(fā)現(xiàn)兩個(gè)JavaBean的同名屬性為不同類型時(shí)，不會(huì)復(fù)制。

經(jīng)過(guò)驗(yàn)證并沒(méi)有像網(wǎng)上有人說(shuō)的會(huì)報(bào)異常。。。

PropertyUtils來(lái)自maven坐標(biāo)

<dependency><groupId>commons-beanutils</groupId><artifactId>commons-beanutils</artifactId><version>1.9.4</version> </dependency>

BeanUtils來(lái)自spring-beans

<dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.1</version> </dependency>

測(cè)試代碼如下：

import org.apache.commons.beanutils.PropertyUtils;/*** @Author: * @Description:* @Date: Created in 9:19 AM 2019/8/28* @Modified By:*/ public class CopyClass {public static void main(String[] args) throws Exception {User u1 = new User();u1.setAge(10);u1.setPassword("22222");u1.setUserName("王黃");u1.setD(1.0f);ToUser u2 = new ToUser(); // BeanUtils.copyProperties(u1, u2);PropertyUtils.copyProperties(u2, u1);System.out.println(u1.getD().getClass());System.out.println(u2.getD().getClass());}}class User {private String userName;private String password;private Integer age;private Float d;public Float getD() {return d;}public void setD(Float d) {this.d = d;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}}class ToUser {private String userName;private String password;private Integer age;private String d;public String getD() {return d;}public void setD(String d) {this.d = d;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}}

執(zhí)行BeanUtils.copyProperties(u1, u2);以后的結(jié)果是



執(zhí)行PropertyUtils.copyProperties(u2, u1)以后的結(jié)果

總結(jié)

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