java-对象序列化代码实例

 1 import java.io.ByteArrayInputStream;
 2 import java.io.ByteArrayOutputStream;
 3 import java.io.ObjectInputStream;
 4 import java.io.ObjectOutputStream;
 5 import java.io.Serializable;
 6 
 7 public class User implements Serializable {
 8     private String username;  
 9     
10     private transient String password;  
11       
12     public User(String username,String password) {  
13         this.username = username;  
14           
15         this.password = password;  
16     }  
17   
18     @Override  
19     public String toString() {  
20         return username + "" + password;  
21     }  
22       
23     public static void main(String[] args) throws Exception{  
24         User user = new User("WeiDong","123456");  
25           
26         System.out.println("Before Serialization:" + user);  
27           
28         ByteArrayOutputStream buf = new ByteArrayOutputStream();  
29         //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  
30         ObjectOutputStream out = new ObjectOutputStream(buf);  
31           
32         out.writeObject(user);  
33           
34         out.close();  
35         //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  
36         ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(buf.toByteArray()));  
37           
38         user = (User)in.readObject();  
39           
40         System.out.println("After Serialization：" + user);  
41           
42         in.close();  
43     }  
44 }
45 
46 Before Serialization:WeiDong123456
47 After Serialization：WeiDongnull