编程第十二天

java实现对象串行化

import java.io.*;
public class Student implements Serializable{
    int number=1;
    String name;
    Student(int number,String n1)
    {
    this.number=number;
    this.name=n1;
    }
    Student()
    {
    this(0,"");
    }
    void save(String fname)
    {
    try
    {
    FileOutputStream fout=new FileOutputStream(fname);
    ObjectOutputStream out=new ObjectOutputStream(fout);
    out.writeObject(this);//写入对象
    out.close();
    }
    catch(FileNotFoundException fe){}
    catch(IOException ioe){}
    }
    void display(String fname)
    {
    try
    {
    FileInputStream fin=new FileInputStream(fname);
    ObjectInputStream in=new ObjectInputStream(fin);
    Student u1=(Student)in.readObject();//读取对象
    System.out.println(u1.getClass().getName()+" "+u1.getClass().getInterfaces()[0]);
    System.out.println(" "+u1.number+" "+u1.name);
    in.close();
    }
    catch(FileNotFoundException fe){}
    catch(IOException ioe){}
    catch(ClassNotFoundException ioe){}
    }
    public static void main(String arg[])
    {
    String fname="student.obj";
    Student s1=new Student(1,"Wang");
    s1.save(fname);
    s1.display(fname);
    }
}