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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