Java学习笔记：序列化和反序列化

 注：Students类需要自己重新创建

单对象序列化

public class ObjectInputStreamTest01 {
    public static void main(String[] args) throws Exception{
        ObjectInputStream  ois =new ObjectInputStream(new FileInputStream("students"));
         //开始反序列化,读
        Object obj = ois.readObject();
        System.out.println(obj);
        //关闭
        ois.close();
    }
}

单对象反序列化

public static void main(String[] args) throws Exception {
    Students s=new Students(111,"zhangsan");
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("students"));
    //序列化对象
    oos.writeObject(s);
    //刷新
    oos.flush();
    //关闭
    oos.close();
}

多个对象序列化，可以把对象放在集合里面，然后序列化集合 

public static void main(String[] args) throws Exception {
    List studentsList = new ArrayList<>();
    studentsList.add(new Students(1, "zhangsan"));
    studentsList.add(new Students(2, "lisi"));
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("student2"));
    //序列化一个集合，这个集合中放了很多其他对象
    oos.writeObject(studentsList);
    oos.flush();
    oos.close();

}

多个对象反序列化

public static void main(String[] args) throws Exception{

     ObjectInputStream s2 = new ObjectInputStream(new FileInputStream("student2"));
           //  Object  ois2    =s2.readObject();
               List ois2  = (List)s2.readObject();
    //System.out.println(ois2);
       //然后for循环
    for(Students studnt3: ois2){
        System.out.println(studnt3);
    }
      s2.close();
}