Java对对象的序列化和反序列化，java序列化,package com.

Java对对象的序列化和反序列化，java序列化,package com.

package com.bird.thinking;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;/** * @use 实现对对象的序列化和反序列化 * @author Bird * */public class Data {    public static void writeObject() throws Exception{        Worm worm = new Worm("Bird");        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("d://worm.out"));        out.writeObject(worm);        out.close();//关闭的同时也刷新清空了缓冲区    }    public static void readObject() throws Exception{        ObjectInputStream in = new ObjectInputStream(new FileInputStream("d://worm.out"));        Worm s2 = (Worm) in.readObject();        System.out.println(s2);    }    public static void main(String[] args) throws Exception{    //  writeObject();        readObject();    }}class Worm implements Serializable{    private static final long serialVersionUID = 1L;    private String name = null;    public Worm(String name){        this.name = name;    }    public String toString(){        return name;    }}

                                下面这是第二种方式

package com.bird.thinking;import java.io.Externalizable;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInput;import java.io.ObjectInputStream;import java.io.ObjectOutput;import java.io.ObjectOutputStream;/** * @use 第二种可控制序列化变量个数的方式 * @author Bird * */public class Blip3 implements Externalizable {    private int i;    private String s;//没有实例化    public Blip3(){        System.out.println("Blip3 Constructor!!");    }    //注意  这里的s没有实例化    public Blip3(String x, int a){        System.out.println("Blip3(String x, int a)");        s = x;        i = a;        //s  和 i实例化在非默认构造函数中    }    public String toString(){        return s + i;    }    public void writeExternal(ObjectOutput out){//可选择写入变量        System.out.println("Blip3.writeExternal");        try {            out.writeObject(s);            out.writeInt(i);        } catch (IOException e) {            throw new RuntimeException(e);        }//必须进行这两项，否则就一个变量也不出初始化    }    public void readExternal(ObjectInput in){//可选择读入数据        System.out.println("Blip3.readExternal");        try {            s = (String)in.readObject();            i = in.readInt();        } catch (ClassNotFoundException e) {        } catch (IOException e) {        throw new RuntimeException(e);        }    }    public void read() throws FileNotFoundException, IOException, ClassNotFoundException{//读取序列化的类        ObjectInputStream in = new ObjectInputStream(new FileInputStream("d://Blip3.out"));        System.out.println("Revovering  b3");        Blip3 b3 = (Blip3)in.readObject();        System.out.println(b3);    }    public void write() throws Exception{//写入对象        Blip3 b3 = new Blip3("A String", 47);        System.out.println(b3);        ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("d://Blip3.out"));        System.out.println("Saving Object");        o.writeObject(b3);        o.close();    }    public static void main(String[] args) throws Exception{        Blip3 b = new Blip3();        //  b.write();        b.read();    }}

                                输出结果

Blip3 Constructor!!Blip3(String x, int a)A String47Saving ObjectBlip3.writeExternal

                                输出结果

Blip3 Constructor!!Revovering  b3Blip3 Constructor!!Blip3.readExternalA String47