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