Java对对象的序列化和反序列化，java序列化,Java提供了将对象以字

Java对对象的序列化和反序列化，java序列化,Java提供了将对象以字

Java提供了将对象以字节的形式写入到磁盘中，在需要的时候在从磁盘中恢复的功能，在网络传输中非常有用，下面将代码贴上，分别用两种形式实现了对象的序列化，其中第二种当时能将指定的变量序列化，更加人性化的随心所欲

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```javaimport 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();}

}

```