林琮鎔a.k.a蛋餅

import java.io.Serializable;
public class Student implements Serializable {
    private String name;
    private int eng;
    private int math;
    // transient 欄位，表示不進行序列化
    private transient int total;
    public Student(String name, int eng, int math) {
        this.name = name;
        this.eng = eng;
        this.math = math;
    }
    public int getTotal() {
        return total = eng + math;
    }
    @Override
    public String toString() {
        return "\nStudent:    "
                + "\nname:   " + name
                + "\n eng:  " + eng
                + "\n math: " + math
                + "\ntotal: " + getTotal();
    }
}

 

---

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
public class StudentOutput {
    public static void main(String[] args) {
        StudentClass sc = new StudentClass();
        sc.add(new Student("Brook", 50, 50));
        sc.add(new Student("Chloe", 100, 100));
        sc.add(new Student("Jason", 10, 20));
        //使用AutoCloseable來避免檔案沒有關閉的問題，使用ObjectOuputStream 輸出資料流
        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("c:/Users/user/Desktop/JavaTest/Student.ser"))) {
            oos.writeObject(sc);
        } catch (Exception e) {
            System.err.println(e);
        }
    }
}

---

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

public class StudentInput {

    public static void main(String[] args) {
        //使用AutoCloseable來避免檔案沒有關閉的問題，使用ObjectInputStream 讀取資料流
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("c:/Users/user/Desktop/JavaTest/Student.ser"))) {
            StudentClass sc = (StudentClass) ois.readObject();
            System.out.println(sc.getList());
        } catch (IOException e) {
            System.err.println(e);
        } catch (ClassNotFoundException ex) {
            System.err.println(ex);
        }
    }
}