Java Socket实战之三 传输对象

前面两篇文章介绍了怎样建立Java Socket通信，这一篇说一下怎样使用Java Socket来传输对象。

首先需要一个普通的对象类，由于需要序列化这个对象以便在网络上传输，所以实现java.io.Serializable接口就是必不可少的了，入下：

[java] view plain copy print ?

1. package com.googlecode.garbagecan.test.socket.sample3; 
2.  
3. public class User implements java.io.Serializable { 
4.     private static final long serialVersionUID = 1L; 
5.     private String name; 
6.     private String password; 
7.  
8.     public User() { 
9.          
10.     } 
11.      
12.     public User(String name, String password) { 
13.         this.name = name; 
14.         this.password = password; 
15.     } 
16.      
17.     public String getName() { 
18.         return name; 
19.     } 
20.  
21.     public void setName(String name) { 
22.         this.name = name; 
23.     } 
24.  
25.     public String getPassword() { 
26.         return password; 
27.     } 
28.  
29.     public void setPassword(String password) { 
30.         this.password = password; 
31.     } 
32. } 

package com.googlecode.garbagecan.test.socket.sample3;public class User implements java.io.Serializable {private static final long serialVersionUID = 1L;private String name;private String password;public User() {}public User(String name, String password) {this.name = name;this.password = password;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}
}

对于Server端的代码，代码中分别使用了ObjectInputStream和ObjectOutputStream来接收和发送socket中的InputStream和OutputStream，然后转换成Java对象，如下：

[java] view plain copy print ?

1. package com.googlecode.garbagecan.test.socket.sample3; 
2.  
3. import java.io.*; 
4. import java.net.ServerSocket; 
5. import java.net.Socket; 
6. import java.util.logging.Level; 
7. import java.util.logging.Logger; 
8.  
9. public class MyServer { 
10.  
11.     private final static Logger logger = Logger.getLogger(MyServer.class.getName()); 
12.      
13.     public static void main(String[] args) throws IOException { 
14.         ServerSocket server = new ServerSocket(10000); 
15.  
16.         while (true) { 
17.             Socket socket = server.accept(); 
18.             invoke(socket); 
19.         } 
20.     } 
21.  
22.     private static void invoke(final Socket socket) throws IOException { 
23.         new Thread(new Runnable() { 
24.             public void run() { 
25.                 ObjectInputStream is = null; 
26.                 ObjectOutputStream os = null; 
27.                 try { 
28.                     is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream())); 
29.                     os = new ObjectOutputStream(socket.getOutputStream()); 
30.  
31.                     Object obj = is.readObject(); 
32.                     User user = (User)obj; 
33.                     System.out.println("user: " + user.getName() + "/" + user.getPassword()); 
34.  
35.                     user.setName(user.getName() + "_new"); 
36.                     user.setPassword(user.getPassword() + "_new"); 
37.  
38.                     os.writeObject(user); 
39.                     os.flush(); 
40.                 } catch (IOException ex) { 
41.                     logger.log(Level.SEVERE, null, ex); 
42.                 } catch(ClassNotFoundException ex) { 
43.                     logger.log(Level.SEVERE, null, ex); 
44.                 } finally { 
45.                     try { 
46.                         is.close(); 
47.                     } catch(Exception ex) {} 
48.                     try { 
49.                         os.close(); 
50.                     } catch(Exception ex) {} 
51.                     try { 
52.                         socket.close(); 
53.                     } catch(Exception ex) {} 
54.                 } 
55.             } 
56.         }).start(); 
57.     } 
58. } 

package com.googlecode.garbagecan.test.socket.sample3;import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;public class MyServer {private final static Logger logger = Logger.getLogger(MyServer.class.getName());public static void main(String[] args) throws IOException {ServerSocket server = new ServerSocket(10000);while (true) {Socket socket = server.accept();invoke(socket);}}private static void invoke(final Socket socket) throws IOException {new Thread(new Runnable() {public void run() {ObjectInputStream is = null;ObjectOutputStream os = null;try {is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));os = new ObjectOutputStream(socket.getOutputStream());Object obj = is.readObject();User user = (User)obj;System.out.println("user: " + user.getName() + "/" + user.getPassword());user.setName(user.getName() + "_new");user.setPassword(user.getPassword() + "_new");os.writeObject(user);os.flush();} catch (IOException ex) {logger.log(Level.SEVERE, null, ex);} catch(ClassNotFoundException ex) {logger.log(Level.SEVERE, null, ex);} finally {try {is.close();} catch(Exception ex) {}try {os.close();} catch(Exception ex) {}try {socket.close();} catch(Exception ex) {}}}}).start();}
}

Client也和Server端类似，同样使用ObjectOutputStream和ObjectInputStream来处理，如下：
[java] view plain copy print ?

1. package com.googlecode.garbagecan.test.socket.sample3; 
2.  
3. import java.io.BufferedInputStream; 
4. import java.io.IOException; 
5. import java.io.ObjectInputStream; 
6. import java.io.ObjectOutputStream; 
7. import java.net.Socket; 
8. import java.util.logging.Level; 
9. import java.util.logging.Logger; 
10.  
11. public class MyClient { 
12.      
13.     private final static Logger logger = Logger.getLogger(MyClient.class.getName()); 
14.      
15.     public static void main(String[] args) throws Exception { 
16.         for (int i = 0; i < 100; i++) { 
17.             Socket socket = null; 
18.             ObjectOutputStream os = null; 
19.             ObjectInputStream is = null; 
20.              
21.             try { 
22.                 socket = new Socket("localhost", 10000); 
23.      
24.                 os = new ObjectOutputStream(socket.getOutputStream()); 
25.                 User user = new User("user_" + i, "password_" + i); 
26.                 os.writeObject(user); 
27.                 os.flush(); 
28.                  
29.                 is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream())); 
30.                 Object obj = is.readObject(); 
31.                 if (obj != null) { 
32.                     user = (User)obj; 
33.                     System.out.println("user: " + user.getName() + "/" + user.getPassword()); 
34.                 } 
35.             } catch(IOException ex) { 
36.                 logger.log(Level.SEVERE, null, ex); 
37.             } finally { 
38.                 try { 
39.                     is.close(); 
40.                 } catch(Exception ex) {} 
41.                 try { 
42.                     os.close(); 
43.                 } catch(Exception ex) {} 
44.                 try { 
45.                     socket.close(); 
46.                 } catch(Exception ex) {} 
47.             } 
48.         } 
49.     } 
50. } 

package com.googlecode.garbagecan.test.socket.sample3;import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;public class MyClient {private final static Logger logger = Logger.getLogger(MyClient.class.getName());public static void main(String[] args) throws Exception {for (int i = 0; i < 100; i++) {Socket socket = null;ObjectOutputStream os = null;ObjectInputStream is = null;try {socket = new Socket("localhost", 10000);os = new ObjectOutputStream(socket.getOutputStream());User user = new User("user_" + i, "password_" + i);os.writeObject(user);os.flush();is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));Object obj = is.readObject();if (obj != null) {user = (User)obj;System.out.println("user: " + user.getName() + "/" + user.getPassword());}} catch(IOException ex) {logger.log(Level.SEVERE, null, ex);} finally {try {is.close();} catch(Exception ex) {}try {os.close();} catch(Exception ex) {}try {socket.close();} catch(Exception ex) {}}}}
}

最后测试上面的代码，首先运行Server类，然后运行Client类，就可以分别在Server端和Client端控制台看到接收到的User对象实例了。

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