JavaSE 对象流

 


ObjectOutputStream和ObjectInputStream分别代表对象字节输出流和对象字节输入流，其功能分别是：

ObjectOutputStream：

提供了writeObject(Serializable)方法，将对象转化成字节流再输出到目标字节流中去。这一个过程称为序列化。需要序列化的类必须实现Serializable接口。

ObjectInputStream：

提供了Object readObject()方法，将字节输入流转化成对象。这一个过程称为反序列化。

   

示例1代码：   class Student implements Serializable{ private String name; private int age; public Student(String name, int age) { super(); this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Student [name=" + name + ", age=" + age + "]"; } } public class TestObjectOutputStream { public static void main(String[] args) { ObjectOutputStream oos=null; FileOutputStream fos=null; try { fos = new FileOutputStream("obj.dat"); oos=new ObjectOutputStream(fos); Student s=new Student("Jack",20); oos.writeObject(s); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally{ try { if(oos!=null)oos.close(); if(fos!=null)fos.close(); } catch (IOException e) { e.printStackTrace(); } } } }

 

示例2代码：

public class TestObjectInputStream { public static void main(String[] args) { ObjectInputStream ois=null; FileInputStream fis=null; try { fis = new FileInputStream("obj.dat"); ois=new ObjectInputStream(fis); Student s=(Student) ois.readObject(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); }finally{ try { if(ois!=null)ois.close(); if(fis!=null)fis.close(); } catch (IOException e) { e.printStackTrace(); } } } }