5.对象操作流ObjectInputStream

反序列化对象

    /**
     * ObjectInputStream
     * 反序列化：对象输入流
     *
     */
    @Test
    public void demo1() throws IOException,ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("other\\person1.txt"));
        Person p1 = (Person) ois.readObject();
        Person p2 = (Person) ois.readObject();
        //Person p3 = (Person) ois.readObject();            //当文件读取到了末尾时出现EOFException
        System.out.println(p1);
        System.out.println(p2);
        ois.close();
    }

EOFException: end off file ，文件结束

Person{name='张三', age=23}
Person{name='李四', age=24}

反序列化对象集合

    @Test
    public void demo2() throws IOException, ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("other\\person_list.txt"));
        ArrayList<Person> list = (ArrayList<Person>) ois.readObject();        //将集合对象一次读取

        for (Person person : list) {
            System.out.println(person);
        }

        ois.close();
    }

Person{name='张三', age=23}
Person{name='李四', age=24}
Person{name='王五', age=25}
Person{name='赵六', age=26}