什么是序列化?
所谓的序列化就是将对象流化,就是将对象变成字节。
如何实现序列化?
让某个类实现Serializable接口(标记性接口)。
将一个对象保存到文件
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 | public class Student implements Serializable{
 private String Num;
 private String Name;
 private String Sex;
 public Student(String Num,String Name,String Sex){
 this.Num = Num;
 this.Name = Name;
 this.Sex = Sex;
 }
 }
 public void objectToFile throws Exception{
 
 FileOutputStream fos = new FileOutputStream("X:\\xxx.xxx");
 ObjcetOutputStream oos = new ObjcetOutputStream(fos);
 
 Student student1 = new Student("123","王五","男");
 
 oos.writeObject(student1);
 
 oos.close();
 fos.close();
 }
 
 | 
从文件中读取一个对象
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 | public void readFromFile() throws Exception{
 FileInputStream fis = new FileInputStream("X:\\xxx.xxx");
 ObjectInputStream ois = new ObjectInputStream(fis);
 
 Student student2 = (Student)ois.readObject();
 
 System.out.println(student2);
 
 ois.close();
 fis.close();
 }
 
 |