读编写高质量代码整理(二续)

请先看完(二),这里直接该处解决办法，写一个CloneUtils(克隆工具)

package clone;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class CloneUtils {
	@SuppressWarnings("unchecked")//告诉java编译器不要类型检查
	public static<T extends Serializable> T clone(T obj) {
		
		//拷贝产生的对象
		T cobj = null;
		try {
			//读取对象字节数据
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(baos);
			oos.writeObject(obj);//写入内存
			oos.close();
			
			ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());//从内存读取byte数组
			ObjectInputStream ois = new ObjectInputStream(bais);		
			cobj =(T) ois.readObject();//从内存读取数据，类似拷贝
			ois.close();
		}catch(Exception e) {
			e.printStackTrace();
		}
		return cobj;
	}
}

 pojo类：

 

package clone;

import java.io.Serializable;

public class Employee implements Serializable{
	
	/**
	 * serialVersionUID 判断反序列化是否为同一对象，如此程序可正常升级，
	 * 如果不显示声明serialVersionUID，则会造成反序列化的对象和原来对象不匹配
	 */
	private static final long serialVersionUID = -4791800223225662659L;
	
	private String name ;
	
	private Employee boss;
	
	public Employee(String _name) {
		name = _name;
	}

	public Employee(String _name,Employee _boss) {
		name = _name;
		boss = _boss;
	}
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Employee getBoss() {
		return boss;
	}

	public void setBoss(Employee boss) {
		this.boss = boss;
	}

}

 如果你嫌麻烦，可以使用Apache下的commons工具包的SerializationUtils类