java 对象流

ゝ一纸荒年。 2022-08-17 13:28 152阅读 0赞

import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.ObjectInputStream;  
import java.io.ObjectOutputStream;  
import java.io.Serializable;  
  
  
public class ObjectDemo   
\{  
  
  
public static void main(String\[\] args) \{  
testObjectOutputStream();  
testObjectInputStream();  
\}  
//对象的反序列化，将硬盘中的文件提供ObjectInputStream转换为需要的对象；  
public static void testObjectInputStream()  
\{  
ObjectInputStream ois = null;  
try\{  
ois = new ObjectInputStream(new FileInputStream("d:\\\\a\\\\a.txt"));  
Person p1 = (Person)ois.readObject();  
System.out.println(p1);  
Person p2 = (Person)ois.readObject();  
System.out.println(p2);  
\} catch (FileNotFoundException e)   
\{  
e.printStackTrace();  
\} catch (ClassNotFoundException e)   
\{  
e.printStackTrace();  
\} catch (IOException e)   
\{  
e.printStackTrace();  
\}finally  
\{  
if(ois != null)  
\{  
try \{  
ois.close();  
\} catch (IOException e) \{  
// TODO Auto-generated catch block  
e.printStackTrace();  
\}  
\}  
\}  
\}  
//对象的序列化过程，将内存中的对象通过ObjectOutputStream转换为二进制流，存储在硬盘文件中；  
public static void testObjectOutputStream()  
\{  
Person p1 = new Person("xiao", 23);  
Person p2 = new Person("da", 21);  
  
ObjectOutputStream oos = null;  
try   
\{  
oos = new ObjectOutputStream(new FileOutputStream(new File("d:\\\\a\\\\a.txt")));  
oos.writeObject(p1);  
oos.flush();  
oos.writeObject(p2);  
oos.flush();  
\} catch (FileNotFoundException e)   
\{  
e.printStackTrace();  
\} catch (IOException e)   
\{  
e.printStackTrace();  
\}finally  
\{  
if(oos != null)  
\{  
try   
\{  
oos.close();  
\} catch (IOException e)   
\{  
e.printStackTrace();  
\}  
\}   
\}   
\}   
\}  
class Person implements Serializable   //实现Serializable接口  
\{  
//实现Serializable接口的类都有一个UID；  
private static final long serialVersionUID = 24367;  
String name;  
Integer age;  
public Person(String name, Integer age)  
\{  
this.name = name;  
this.age = age;  
\}  
@Override  
public String toString()   
\{  
return "name" + this.name + "age" +this.age;  
\}  
\}