通过Wifi实现设备间的通信

服务器端，建立监听（方法更新，可以同时连接多个Client）

public class Server extends ServerSocket {

	private static ArrayList<String> mUserList = new ArrayList<String>();
	private static ArrayList<Thread> mThreader = new ArrayList<Thread>();
	private static LinkedList<String> mMessageArray = new LinkedList<String>();
	private static int mThreadCounter = 0;
	private static boolean isClear = true;

	public Server(int port) throws IOException {

		super(port);
		new Broadcast();

		try {
			while (true) {
				Socket socket = accept();
				new CreateServerThread(socket);
			}
		} catch (IOException e) {
		} finally {
			close();
		}
	}

	// --- CreateServerThread
	class CreateServerThread extends Thread {

		private Socket client;
		private BufferedReader in;
		private PrintWriter out;
		private String username;

		public CreateServerThread(Socket s) throws IOException {
			client = s;
			in = new BufferedReader(new InputStreamReader(
					client.getInputStream(), "UTF8"));
			out = new PrintWriter(client.getOutputStream(), true);
			sendMessage("--- Welcome ---");
			sendMessage("Input your nickname:");
			start();
		}

		public void sendMessage(String msg) {
			out.println(msg);
			System.out.println(msg);
		}

		public void run() {
			try {
				int flag = 0;
				mThreadCounter++;
				String line = in.readLine();
				while (line == null || !line.equals("bye")) {
					if (line == null) {
						// sendMessage("null");
						line = in.readLine();
						continue;
					}

					if (line.equals("l")) {
						sendMessage(listOnlineUsers());
						line = in.readLine();
						continue;
					}

					if (flag++ == 0) {
						username = line;
						mUserList.add(username);
						sendMessage(listOnlineUsers());
						mThreader.add(this);
						pushMessage("[< " + username + " come on in >]");
					} else {
						pushMessage("<" + username + ">" + line);
					}

					line = in.readLine();
				}

				sendMessage("--- See you, bye! ---");
				client.close();
			} catch (IOException e) {
			} finally {
				try {
					client.close();
				} catch (IOException e) {
				}
				mThreadCounter--;
				mThreader.remove(this);
				mUserList.remove(username);
				pushMessage("[< " + username + " left>]");
			}
		}

		private String listOnlineUsers() {
			String s = "-+- Online list -+-1512";
			for (int i = 0; i < mUserList.size(); i++) {
				s += "[" + mUserList.get(i) + "]1512";
			}
			s += "-+---------------------+-";
			return s;
		}

		private void pushMessage(String msg) {
			mMessageArray.addLast(msg);
			isClear = false;
		}
	}

	// --- Broadcast
	class Broadcast extends Thread {
		public Broadcast() {
			start();
		}

		public void run() {
			while (true) {
				if (!isClear) {
					String tmp = mMessageArray.getFirst();
					for (int i = 0; i < mThreader.size(); i++) {
						CreateServerThread client = (CreateServerThread) mThreader
								.get(i);
						client.sendMessage(tmp);
					}
					mMessageArray.removeFirst();
					isClear = mMessageArray.size() > 0 ? false : true;
				}
			}
		}
	}
}

客户端，发送消息

public class Client {

	private Socket socket;
	private BufferedReader in;
	private PrintWriter out;

	public Client(String domain, int port) {
		connect(domain, port);
		get(in);
	}

	private void connect(String domain, int port) {
		try {
			socket = new Socket(domain, port);
			in = new BufferedReader(new InputStreamReader(
					socket.getInputStream()));
			out = new PrintWriter(socket.getOutputStream(), true);
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private void get(final BufferedReader in) {

		new Thread(new Runnable() {

			public void run() {

				try {
					String line = in.readLine();
					while (true) {
						line = in.readLine();
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}).start();
	}

	public void send(String msg) {
		out.println(msg);
	}

	public void disconnect() {
		try {
			out.close();
			in.close();
			socket.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

评论

2 楼 dai_lm 2012-10-02  

lyx0224 写道

强~~~~~

过奖，只是总结了前人的智慧，拼拼凑凑后的代码

1 楼 lyx0224 2012-09-27  

强~~~~~