序列化实现深拷贝

SerializeUtil.java

package com.lei.DailyTest.D20180316;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;



public class SerializeUtil {
    
    private static Logger logger = LoggerFactory.getLogger(SerializeUtil.class);
    
    public static byte[] serialize(Object obj) {
        byte[] result=new byte[0];
        if(obj==null) {
            return result;
        }
        try {
            ByteArrayOutputStream baos=new ByteArrayOutputStream(128);
            ObjectOutputStream oos=null;
            try {
                if (!(obj instanceof Serializable)) {
                    logger.error( ByteArrayOutputStream.class.getName()+ " requires a Serializable payload " +
                            "but received an object of type [" + obj.getClass().getName() + "]");
                    return new byte[0];
                }
                oos=new ObjectOutputStream(baos);
                oos.writeObject(obj);
                oos.flush();
                result=baos.toByteArray();
            }catch (Exception e) {
                logger.error("Failed to serialize, Can't write \n"+e);
            }
            finally {
                if(oos!=null)
                    oos.close();
                logger.info("Serialize success!");
            }
        }catch (Exception e) {
            logger.error("Failed to serialize, Can't create ByteArrayOutputStream\n"+e);
        }    
        return result;
    }
    
    public static Object deSerialize(byte[] bytes) {
        Object result=null;
        if(bytes==null || bytes.length==0) {
            return result;
        }
        try {
            ByteArrayInputStream bais=new ByteArrayInputStream(bytes);
            ObjectInputStream ois=null;
            try {
                ois=new ObjectInputStream(bais);
                result=ois.readObject();
            }catch (Exception e) {
                logger.error("Failed to deSerialize\n"+e);
            }finally {
                if(ois!=null)
                    ois.close();
                logger.info("Deserialize success!");
            }
            
        }catch (Exception e) {
            logger.error("Failed to deSerialize\n"+e);
        }
        return result;
    }
}

TestClass.java

package com.lei.DailyTest.D20180316;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class TestClass {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Cat cat1=new Cat("阿三");
        Cat cat2=new Cat("阿四");
        List<Cat> list=new ArrayList<Cat>();
        list.add(cat1);
        list.add(cat2);
        Dog dog=new Dog(18,"大黄",new Cat("小猫咪"),list);
        byte[] bytes=SerializeUtil.serialize(dog);
        Dog obj=(Dog) SerializeUtil.deSerialize(bytes);
        System.out.println(obj);
        
        byte[] bytes2=SerializeUtil.serialize(list);
        @SuppressWarnings("unchecked")
        List<Cat> cats=(List<Cat>) SerializeUtil.deSerialize(bytes2);
        System.out.println(cats);
    }

}

class Dog implements Serializable{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private int age;
    private String name;
    private Cat cat;
    private List<Cat> cats;
    public Dog() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Dog(int age, String name, Cat cat,List<Cat> cats) {
        super();
        this.age = age;
        this.name = name;
        this.cat = cat;
        this.cats = cats;
    }
    @Override
    public String toString() {
        return "Dog [age=" + age + ", name=" + name + ", cat=" + cat + ", cats=" + cats + "]";
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Cat getCat() {
        return cat;
    }
    public void setCat(Cat cat) {
        this.cat = cat;
    }
    public List<Cat> getCats() {
        return cats;
    }
    public void setCats(List<Cat> cats) {
        this.cats = cats;
    }
    
}

class Cat implements Serializable{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private String name;
    public Cat() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Cat(String name) {
        super();
        this.name = name;
    }
    @Override
    public String toString() {
        return "Cat [name=" + name + "]";
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

 要注意的是要序列化的对象以及其中的对象类型的需要实现Serializable接口