Java socket 实现tcp通信

客户端：Client

[java] view plaincopy

1. package socket;  
2.   
3. import java.io.BufferedReader;  
4. import java.io.BufferedWriter;  
5. import java.io.IOException;  
6. import java.io.InputStreamReader;  
7. import java.io.OutputStreamWriter;  
8. import java.net.Socket;  
9. import java.net.UnknownHostException;  
10.   
11. public class Client {  
12.     private static final String SERVER_IP = "localhost";  
13.     private static final int PORT = 9999;  
14.   
15.     public static void main(String [] args) throws UnknownHostException, IOException{  
16.         Socket socket = new Socket(SERVER_IP, PORT);  
17. //      BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getOutputStream()));  
18.         BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));  
19.         writer.write("message");  
20.         writer.flush();  
21.         socket.close();  
22.     }  
23. }  

服务器端：Server

[java] view plaincopy

1. package socket;  
2.   
3. import java.io.BufferedReader;  
4. import java.io.IOException;  
5. import java.io.InputStreamReader;  
6. import java.net.ServerSocket;  
7. import java.net.Socket;  
8.   
9. public class Server {  
10.     private static final int PORT = 9999;  
11.     public static void main(String [] args) throws IOException{  
12.         ServerSocket server = new ServerSocket(PORT);  
13.         Socket socket = server.accept();  
14.         BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
15.         System.out.println("server : "+reader.readLine());  
16.         socket.close();  
17.     }  
18.   
19. }