serializabledemo.java

用java对文件操作的一些代码（包括文件读取

package java_io;
import java.io.*;
public class SerializableDemo{
    public static void main(String args[]) throws FileNotFoundException,
            IOException, ClassNotFoundException {
        Student stu1, stu2; //创建两个student类的对象。
        stu1 = new Student(20040902, "lzquan", 22, "科学技术师范学院");
        stu2 = new Student(20041005, "yaya", 20, "科学技术师范学院");
        //显示在没要序列化之前的状态
        System.out.println("Status before Object is serialized");
        System.out.println(stu1);
        System.out.println(stu2);
        //创建文件输出流，保存对象的状态。
        FileOutputStream fout = new FileOutputStream("testFile/Objctdata.dat");
        //创建对象输出流，和文件输出流相连。
        ObjectOutputStream out = new ObjectOutputStream(fout);
        System.out.println("Object is serialized and saved to file.....");
        //将对象写入到输出流中保存。

        out.writeObject("stu1 : "+stu1);
        out.writeObject("stu2 : "+stu2);
        out.close();

        Student newStu1, newStu2;
        //创建文件输入流。
        FileInputStream fin = new FileInputStream("testFile/Objctdata.dat");
        //创建对象输入流，和文件输入流向连。
        ObjectInputStream in = new ObjectInputStream(fin);
        newStu1 = (Student) in.readObject();
        newStu2 = (Student) in.readObject();
        in.close();

        System.out.println("Object is recovered from file.");
        System.out.println("newStu1 : " + newStu1);
        System.out.println("newStu2 : " + newStu2);
    }
}