apache下的BeanUtils和PropertyUtils的一个不同

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1、引入apache jar 包，如下：

commons-beanutils-1.7.0.jar

commons-logging.jar

2、

User u1 = new User();u1.setAge(10);u1.setPassword("22222");u1.setUserName("王黄");u1.setD(1.0f);ToUser u2 = new ToUser();try {BeanUtils.copyProperties(u2, u1);//PropertyUtils.copyProperties(u2, u1);} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();}

BeanUtils和PropertyUtils进行对象复制时，都是将后边的对象的属性值复制给前面的对象。

BeanUtils和PropertyUtils复制对象时，根据属性名进行复制。

如果属性名相同，但类型不同，BeanUtils会直接转换。而PropertyUtils会直接抛出异常。

3、代码：

（1）

package com.test;public 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;}}

（2）

package com.test;public 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;}}

（3）

package com.test;import java.lang.reflect.InvocationTargetException;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.PropertyUtils;public class CopyClass {public static void main(String[] args) {User u1 = new User();u1.setAge(10);u1.setPassword("22222");u1.setUserName("王黄");u1.setD(1.0f);ToUser u2 = new ToUser();try {BeanUtils.copyProperties(u2, u1);//PropertyUtils.copyProperties(u2, u1);} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();}System.out.println(u1.getD().getClass());System.out.println(u2.getD().getClass());}}

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