apache下的BeanUtils和PropertyUtils的一个不同

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。

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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());
	}

}