remotefileserver.java

java socket基础编程实例

   /*
	* Name of the Application     : RemoteFileServer.java
	* Development Environment     : Eclipse3.0M8
	* @Version 1.0
	* Describtion 
	* 
	*	1)response requests from the client for the file
	* 
	*
	*
	* Creation / Modification History
	*	wsl	19:15 06/29/2004	Creation       
	*
	* Copyright ® 2004 www.cnlab.net
	* All right reserved. 
	*/
package net.cnlab.wsl.testsocket.remotefile;

import java.io.*;
import java.net.*;

public class RemoteFileServer {
	
	protected int listenPort = 3000;
	
	public static void main(String[] args) {
		RemoteFileServer server = new RemoteFileServer();
		server.acceptConnections();
	}
	
	public void acceptConnections() {
		try {
			System.out.println("the Server is running...");
			ServerSocket server = new ServerSocket(listenPort);
			Socket incomingConnection = null;
			while (true) {
			incomingConnection = server.accept();
			handleConnection(incomingConnection);
			}
		} catch (BindException e) {
			System.out.println("Unable to bind to port " + listenPort);
		} catch (IOException e) {
			System.out.println("Unable to instantiate a ServerSocket on port: " + listenPort);
		}
	}
	
	public void handleConnection(Socket incomingConnection) {
		try {
			OutputStream outputToSocket = incomingConnection.getOutputStream();
			InputStream inputFromSocket = incomingConnection.getInputStream();
			BufferedReader streamReader = new BufferedReader(new InputStreamReader(inputFromSocket));
			FileReader fileReader = new FileReader(new File(streamReader.readLine()));
			BufferedReader bufferedFileReader = new BufferedReader(fileReader);
			PrintWriter streamWriter = new PrintWriter(incomingConnection.getOutputStream());
			String line = null;
			while ((line = bufferedFileReader.readLine()) != null) {
				streamWriter.println(line);
			}
			fileReader.close();
			streamWriter.close();
			streamReader.close();
		} catch (Exception e) {
			System.out.println("Error handling a client: " + e);
		}
	}
}