ObjectInputStream与ObjectOutputStream类实现对象的存取

1.

ObjectInputStream与ObjectOutputStream类所读写的对象必须实现Serializable接口，对象中的transient和static类型成员变量不会被读取和写入

2.

Serializable是个对象序列化接口，只有序列化才能实现对象存取

3.读写方法（存取BOOK类）

public class Util {
    public String path = "c:/book.db";

    public  ArrayList<Book> readBook() {
        ArrayList<Book> s = new ArrayList<Book>();
        try {
            FileInputStream fis = new FileInputStream(path);
            ObjectInputStream ois = new ObjectInputStream(fis);
            s = (ArrayList<Book>)ois.readObject();
            fis.close();
            ois.close();
        } catch (Exception e) {
        }
        return s;

    }

    public void writeBook(Book book) {
        ArrayList<Book> books = readBook();
        books.add(book);
        try {
            FileOutputStream fos = new FileOutputStream(path);
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(books);
            fos.close();
            oos.close();
        } catch (Exception e) {
        }

    }
}

 

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