JAVA实现的一个简单的Socket Server范例

随手做的一个简单的Socket服务器，用来模拟全向移动平台机上控制器的响应的，配合全向移动平台手机控制器调试用的。

在主线程里死循环监听端口12000，有客户端连接就新建一个子线程，在子线程里接受客户端数据（byte[10]，每个字节分别定义了运动状态、运动速度等信息），进行解析，在控制台显示当前速度或状态，回传数据。客户端退出则关闭子线程，返回主线程继续等待连接。

命令行运行 java -jar  程序名.jar

完整源码

http://download.csdn.net/detail/kagami1983/8807765

主线程代码：

	public SocketServerForMecanum() {
		try {
			serverSocket = new ServerSocket(12000);
		} catch (IOException e) {			
			//e.printStackTrace();
			System.out.println("Create ServerSocket Error...");
		}
	}

	@Override
	public void run() {
		while (true) {
			System.out.println("Listenning...");
			try {
				// 每个请求交给一个线程去处理
				socket = serverSocket.accept();
				ServerThread serverThread = new ServerThread(socket);
				serverThread.start();
				sleep(1000);
			} catch (Exception e) {
				//e.printStackTrace();
				System.out.println("Create Socket Error...");
			}

		}

	}

子线程代码：

	class ServerThread extends Thread {
		private Socket socket;
		private InputStream ins;
		private OutputStream ous;
		private byte[] buffer_received = new byte[10];
		private short moveX = 0, moveY = 0, rotate = 0;
		private int recount = 0;

		public ServerThread(Socket socket) {
			// super();
			this.socket = socket;
			try {
				ins = socket.getInputStream();
				ous = socket.getOutputStream();
			} catch (IOException e) {				
				//e.printStackTrace();
				System.out.println("Create ServerThread Error...");
			}

		}

		@Override
		public void run() {

			while (true) {
				try {
					ins.read(buffer_received);

					if (recount >= 5) {
						recount = 0;
						moveX = 0;
						moveX = (short) (buffer_received[5] & 0x00ff);
						moveX <<= 8;
						moveX |= (buffer_received[4] & 0x00ff);
						moveY = 0;
						moveY = (short) (buffer_received[7] & 0x00ff);
						moveY <<= 8;
						moveY |= (buffer_received[6] & 0x00ff);
						rotate = 0;
						rotate = (short) (buffer_received[9] & 0x00ff);
						rotate <<= 8;
						rotate |= (buffer_received[8] & 0x00ff);
						System.out.println("moveX=" + moveX + ";" + "moveY="
								+ moveY + ";" + "rotate=" + rotate + ";");

					} else {
						recount++;
					}

					/*//buffer的头字节为2，则认为收到了客户端主动请求关闭连接
					if (buffer_received[0] == 2) {
						ins.close();
						ous.close();
						socket.close();
						return;
					}*/
					
					//模拟上电
					if (buffer_received[2] == 1) {
						System.out.println("Power ON...");
					}
					
					//模拟下电
					if (buffer_received[2] == 2) {
						System.out.println("Power OFF...");
					}
					
					//模拟停止
					if (buffer_received[2] == 4) {
						System.out.println("Stop Button Pushed!...");
					}
					
					//将首字节置1然后回传
					buffer_received[0] = 1;
					ous.write(buffer_received);

				} catch (IOException e) {					
					//e.printStackTrace();
					System.out.println("Client Disconnected...");
					//当客户端因各种原因关闭连接而且没有通知服务端的，包括屏幕翻转、打开首选项等情况
					try {
						ins.close();
						ous.close();
						socket.close();
					} catch (IOException e1) {						
						e1.printStackTrace();
					}
					return;
				}

			}

		}

	}