???????????????????????????????????????????????????????????????????????????????????е?????????????????????????????Java??????????????У?????????????????????????????????????????Java????

??????Java??????????????е??????????????л???

????????????л???Java???????????????????л???

????????????л???????????????

????1??????????????е???浽?????????????????????У?

????2???????????????????????С?

???????JDK????е????л?API

????java.io.ObjectOutputStream??????????????????writeObject(Object obj)???????????????obj??????????л????????????????д??????????????С?

????java.io.ObjectInputStream???????????????????readObject()?????????????????ж????????У????????????л??????????????????

????????????Serializable??Externalizable?????????????????л???Externalizable???????Serializable???????Externalizable????????????????????????л???????????????Serializable???????????????????л???? ??

???????????л????????2??裺

????1??????????????????????????????????????????????????????????????

????2????????????????writeObject()????д????

???????????л?????????￡?

????1???????????????????????????????????????????????????????????????

????2?????????????????readObject()???????????

?????????????????????????????????????????￡?

import java.io.*;
import java.util.Date;

public class ObjectSaver {


public static void main(String[] args) throws Exception {
??ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("D:""objectFile.obj"));

??//???л?????
??Customer customer = new Customer("?????"?? 24);
??out.writeObject("???!");
??out.writeObject(new Date());
??out.writeObject(customer);
??out.writeInt(123);
??out.close();

??//?????л?????
??ObjectInputStream in = new ObjectInputStream(new FileInputStream("D:""objectFile.obj"));
??System.out.println("obj1=" + (String) in.readObject());
??System.out.println("obj2=" + (Date) in.readObject());
??Customer obj3 = (Customer) in.readObject();
??System.out.println("obj3=" + obj3);
??int obj4 = in.readInt();
??System.out.println("obj4=" + obj4);
??in.close();
}
}

class Customer implements Serializable {
private String name;
private int age;
public Customer(String name?? int age) {
this.name = name;
this.age = age;
}

public String toString() {
return "name=" + name + "?? age=" + age;
}
}

?????????????￡?