java-对象序列化代码实例

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class User implements Serializable {
    private String username;  
    
    private transient String password;  
      
    public User(String username,String password) {  
        this.username = username;  
          
        this.password = password;  
    }  
  
    @Override  
    public String toString() {  
        return username + "" + password;  
    }  
      
    public static void main(String[] args) throws Exception{  
        User user = new User("WeiDong","123456");  
          
        System.out.println("Before Serialization:" + user);  
          
        ByteArrayOutputStream buf = new ByteArrayOutputStream();  
        //创建一个对象输出流，通过对象输出流的writeObject()写对象到输出流中  
        ObjectOutputStream out = new ObjectOutputStream(buf);  
          
        out.writeObject(user);  
          
        out.close();  
        //创建一个对象输入流，通过对象输入流的readObject()从输入流中读取对象  
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buf.toByteArray()));  
          
        user = (User)in.readObject();  
          
        System.out.println("After Serialization：" + user);  
          
        in.close();  
    }  
}

Before Serialization:WeiDong123456
After Serialization：WeiDongnull