springboot项目添加TCP接口数据上传/下发

一般在启动类上添加

注意：一般检测TCP传输的数据软件----Sockit

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@SpringBootApplication   public class Application extends <strong>SpringBootServletInitializer</strong> implements <strong>CommandLineRunner</strong> {       @Autowired     <strong> //注意此处将要用的TCP进行调用</strong>     TcpSocketServer tcpSocketServer;<br>     public static void main(String[] args)throws IOException {         SpringApplication.run(Application.class, args);     }     @Override      <strong>//重写run方法，来对TCP数据进行操作</strong>     public void run(String... args) throws Exception {         tcpSocketServer.startSocketServer(port);    <strong> //注：此处port绑定端口号</strong>     }         }

　在 tcpSocketServer 内：   注意：一般涉及TCP接口的项目都是关于指令上传和下发的

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@Component @Slf4j      //前提是 导入了lombok的包 public class TcpSocketServer extends BaseController {     @Autowired     TcpServices tcpServices;     @Autowired     XxxService xxxService;           private Charset cs = Charset.forName("UTF-8");     //接受数据缓冲区     private static ByteBuffer sBuffer = ByteBuffer.allocate(1024);     //发送数据缓冲区     private static ByteBuffer rBuffer = ByteBuffer.allocate(1024);     //监听器     private static Selector selector;       private static String   responseMsg;     /**      * 启动socket服务，开启监听      *      * @param port      * @throws IOException      */     public  void startSocketServer(int port) {         try {             //打开通信信道             ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();             //设置为非阻塞             serverSocketChannel.configureBlocking(false);             //获取套接字             ServerSocket serverSocket = serverSocketChannel.socket();             //绑定端口号             serverSocket.bind(new InetSocketAddress(port));             //打开监听器             selector = Selector.open();             //将通信信道注册到监听器             serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT);               //监听器会一直监听，如果客户端有请求就会进入相应的事件处理             while (true) {                 selector.select();//select方法会一直阻塞直到有相关事件发生或超时                 Set<SelectionKey> selectionKeys = selector.selectedKeys();//监听到的事件                 for (SelectionKey key : selectionKeys) {                     handle(key);                 }                 selectionKeys.clear();//清除处理过的事件             }         } catch (Exception e) {             e.printStackTrace();         }     }       /**      * 处理不同的事件      *      * @param selectionKey      * @throws IOException      */     private void handle(SelectionKey selectionKey) throws IOException {         ServerSocketChannel serverSocketChannel = null;         SocketChannel socketChannel = null;         String requestMsg = "";         int count = 0;         if (selectionKey.isAcceptable()) {             //每有客户端连接，即注册通信信道为可读             serverSocketChannel = (ServerSocketChannel) selectionKey.channel();             socketChannel = serverSocketChannel.accept();             socketChannel.configureBlocking(false);             socketChannel.register(selector, SelectionKey.OP_READ);         } else if (selectionKey.isReadable()) {             socketChannel = (SocketChannel) selectionKey.channel();             rBuffer.clear();             count = socketChannel.read(rBuffer);               //读取数据             if (count > 0){             rBuffer.flip(); //从缓存区头部开始读取数据操作               //缓存区读取到的数据                requestMsg = String.valueOf(cs.decode(rBuffer).array()); } //这里是处理从TCP接口上传的数据业务层，一般可以在业务层根据switch case来对不同数据进行分类方法处理xxxServices.dealMethods(requestMsg);  sBuffer = ByteBuffer.allocate(responseMsg.getBytes("UTF-8").length);   //一般responseMsg为从数据库或其他数据源处获取的数据字符串                      //此处为指令下发                           responseMsg=configurationMap.toString();        sBuffer.put(responseMsg.getBytes("UTF-8"));                                                         sBuffer.flip();         socketChannel.write(sBuffer);                               }           socketChannel.close();           }         }       }     }