串行化对象（深度复制）

public class TestSeq {
    /**
     * 
     */
    @Test
    public void testClass(){
        Jing8 jing8 = new Jing8();
        Class clazz = jing8.getClass();
        //
        System.out.println(clazz == Dog.class);
        //
        System.out.println(jing8 instanceof Dog);
    }
    
    class Dog{
        
    }
    class Jing8 extends Dog{
        
    }
    
    /**
     * 测试序列
     */
    @Test
    public void testSerialize() throws Exception{
        Integer i = 100 ;
        FileOutputStream fos = new FileOutputStream("d:/tmp.dat");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(i);
        oos.close();
        fos.close();
        
    }
    /**
     * 测试反序列
     */
    @Test
    public void testDeSerialize() throws Exception{
        Integer i = 100 ;
        FileInputStream fis = new FileInputStream("d:/tmp.dat");
        ObjectInputStream ois = new ObjectInputStream(fis);
        Integer ii = (Integer)ois.readObject();
        System.out.println(ii);
        ois.close();
        fis.close();
    }
}

2、深度复制

深度复制

复制整个对象图。
串行化                 //将对象转换成字节数组。数据格式。
java.io.Serializable    //可串行化接口，标识性接口。
ObjectOuputStream       //串行
ObjectInputStream       //反串行
serialVersionUID        //反串行时判断类的版本。
transient               //临时的。

压缩流

ZipInputStream      //解压缩流
ZipOutputStream     /压缩流
ZipEntry            //条目

串行化

将对象转换成字节数组。

java.io.Serializable

串行化接口，标识性接口。

ObjectOutputStream

java.io.NotSerializableException: com.it18zhang.archive.Person

transient

关键在，修饰不能持久化的属性。
串行化时不包含的。

深度复制

复制的是整个对象图。
通过java的串行化机制实现。

ByteArray输入输出流可以不关闭

 

public class TestDogSerialize {

    /**
     * 串行化dog对象
     */
    @Test
    public void testSer() throws Exception{
        FileOutputStream fos = new FileOutputStream("d:/dog.dat");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        Dog dog = new Dog("大黄", 3);
        oos.writeObject(dog);
        oos.close();
        fos.close();
    }
    
    /**
     * 串行化dog对象
     */
    @Test
    public void testDeSer() throws Exception{
        FileInputStream fis = new FileInputStream("d:/dog.dat");
        ObjectInputStream ois = new ObjectInputStream(fis);
        Dog d = (Dog)ois.readObject();
        System.out.println(d.getName());
        System.out.println(d.getAge());
        System.out.println(d.getColor());
        ois.close();
        fis.close();
    }
    

    /**
     * 串行化dog对象
     * 实现深度复制
     */
    @Test
    public void testDogSer2() throws Exception{
        //串行化
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        
        Dog dog = new Dog("大黄", 3);
        Person p = new Person();
        Cat cat = new Cat("加肥");
        //设置关联关系
        dog.setOwner(p);
        dog.setPartner(cat);
        cat.setOwner(p);
        //
        oos.writeObject(dog);
        oos.writeObject(dog);
        oos.close();
        baos.close();
        //
        byte[] bytes = baos.toByteArray();
        System.out.println();
        
        //反串行化
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream ois = new ObjectInputStream(bais);
        Dog copyDog = (Dog) ois.readObject();
        Dog copyDog1 = (Dog) ois.readObject();
        ois.close();
        bais.close();
        System.out.println();
    }
}

3、对象类

/**
 * Person
 */
public class Person implements Serializable{
    private static final long serialVersionUID = -7629715871683829614L;
    private String name ;

    public String getName() {
        return name;
    }

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


//cat
public class Cat implements Serializable{
    private static final long serialVersionUID = 718380935795444836L;
    private String name;
    
    private Person owner ;
    
    public Person getOwner() {
        return owner;
    }

    public void setOwner(Person owner) {
        this.owner = owner;
    }

    public Cat(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

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

//dog
public class Dog implements Serializable{
    private static final long serialVersionUID = 130874992691377104L;
    private String name;
    private int age;
    
    private String color ;
    
    //伙伴
    private Cat partner ;
    
    //临时的
    private transient Person owner ;
    
    public Person getOwner() {
        return owner;
    }

    public void setOwner(Person owner) {
        this.owner = owner;
    }

    public Cat getPartner() {
        return partner;
    }

    public void setPartner(Cat partner) {
        this.partner = partner;
    }

    public Dog(String name, int age) {
        super();
        this.name = name;
        this.age = age;
        System.out.println("kkkk");
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }
}