序列换&反序列化

序列化：把一个对象从内存中存放到硬盘中的过程

//所有要序列化的类都必须实现Serializable接口Dog d=new Dog("来福1","公",23);File file = new File("f:\图片\dog1");FileOutputStream fos = new FileOutputStream(file);BufferedOutputStream bos = new BufferedOutputStream(fos);ObjectOutputStream oos = new ObjectOutputStream(bos);oos.writeObject(d);//关闭必须由内而外！oos.close();bos.close();fos.close();System.out.println("ok");

反序列化：将对象从硬盘介质中还原到内存中

File file = new File("f:\图片\dog");FileInputStream fis = new FileInputStream(file);BufferedInputStream bis = new BufferedInputStream(fis);ObjectInputStream ois = new ObjectInputStream(bis);Dog d = (Dog)ois.readObject();System.out.println(d.getName());ois.close(); bis.close();fis.close();//保存1000只狗 ArrayList dogs = new ArrayList();for (int i = 0; i < 1000; i++) {Dog d = new Dog("旺财"+i, "公", i+1);dogs.add(d);}File file = new File("f:\图片\dogs.bak");FileOutputStream fos = new FileOutputStream(file);BufferedOutputStream bos = new BufferedOutputStream(fos);ObjectOutputStream oos = new ObjectOutputStream(bos);oos.writeObject(dogs);oos.close();bos.close();fos.close();