搭建SpringBoot+ Netty + WebSocket 通信协议框架

本文档介绍了如何结合SpringBoot和Netty搭建WebSocket通信协议框架,适用于与机器设备通讯等场景。文中详细列举了从配置类、properties配置、Action、Command注解到Handler接口和帧定义的步骤,并提供了在线测试工具和测试方法。

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运用场景:与机器设备进行通讯或者其他场景;
pom文件就不上传了,直接上代码,网上都可以找的到 主要是 SpringBoot 和 Netty 的依赖

1.配置类

@Component
@ConfigurationProperties(prefix = "ws")
public class WebSocketConfig {

    private int port;
    private String host;
    private boolean ssl;
    private String cert;
    private String key;

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public boolean getSsl() {
        return ssl;
    }

    public void setSsl(boolean ssl) {
        this.ssl = ssl;
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getCert() {
        return cert;
    }

    public void setCert(String cert) {
        this.cert = cert;
    }
}

2.properties 配置文件

ws.ssl=false
ws.port=8082
ws.host=localhost

3.Action

public class Action {

    private Object target;

    private Method method;


    /**
     * @param target
     * @param method
     */
    public Action(Object target, Method method) {
        this.target = target;
        this.method = method;
    }

    public Object call(Object... args) throws InvocationTargetException, IllegalAccessException {
        return method.invoke(target, args);
    }

    public Object getTarget() {
        return target;
    }

    public void setTarget(Object target) {
        this.target = target;
    }

    public Method getMethod() {
        return method;
    }

    public void setMethod(Method method) {
        this.method = method;
    }

    @Override
    public String toString() {
        return "ActionMethod{" +
                "target=" + target +
                ", method=" + method +
                '}';
    }
}

4.定义Command注解

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Component
public @interface Command {
    int value();
}

实现局域网音视频通话可以用Spring Boot作为后端框架Netty作为网络通信框架WebSocket作为实现双向通信的协议。以下是一个简单的实现过程: 1. 首先需要搭建一个Spring Boot项目,可以使用Spring Initializr来快速生成项目。在pom.xml中添加NettyWebSocket的依赖,例如: ```xml <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.1.25.Final</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency> ``` 2. 创建一个WebSocket处理器类,用来处理WebSocket的连接、关闭和消息收发等逻辑。例如: ```java @Component @ServerEndpoint("/video-chat") public class VideoChatHandler { private static final Logger LOGGER = LoggerFactory.getLogger(VideoChatHandler.class); @OnOpen public void onOpen(Session session) { LOGGER.info("WebSocket opened: {}", session.getId()); } @OnMessage public void onMessage(String message, Session session) { LOGGER.info("Received message: {}", message); // TODO: 处理收到的消息 } @OnClose public void onClose(Session session) { LOGGER.info("WebSocket closed: {}", session.getId()); } @OnError public void onError(Throwable error) { LOGGER.error("WebSocket error", error); } } ``` 3. 在Spring Boot的配置类中添加WebSocket的配置,例如: ```java @Configuration @EnableWebSocket public class WebSocketConfig implements WebSocketConfigurer { @Autowired private VideoChatHandler videoChatHandler; @Override public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) { registry.addHandler(videoChatHandler, "/video-chat").setAllowedOrigins("*"); } } ``` 4. 使用Netty来实现音视频的传输。可以使用Netty提供的UDP协议来实现多人音视频通话,也可以使用TCP协议来实现点对点的音视频通话。需要根据实际情况选择相应的协议,这里以TCP协议为例: ```java @Component public class VideoChatServer { private static final Logger LOGGER = LoggerFactory.getLogger(VideoChatServer.class); @Value("${server.video-chat.port}") private int port; @PostConstruct public void start() { EventLoopGroup bossGroup = new NioEventLoopGroup(); EventLoopGroup workerGroup = new NioEventLoopGroup(); try { ServerBootstrap bootstrap = new ServerBootstrap(); bootstrap.group(bossGroup, workerGroup) .channel(NioServerSocketChannel.class) .childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { ChannelPipeline pipeline = ch.pipeline(); // TODO: 添加音视频相关的编解码器和处理器 } }) .option(ChannelOption.SO_BACKLOG, 128) .childOption(ChannelOption.SO_KEEPALIVE, true); ChannelFuture future = bootstrap.bind(port).sync(); LOGGER.info("Video chat server started on port {}", port); future.channel().closeFuture().sync(); } catch (InterruptedException e) { LOGGER.error("Video chat server interrupted", e); } finally { workerGroup.shutdownGracefully(); bossGroup.shutdownGracefully(); } } } ``` 5. 在WebSocket处理器中实现音视频数据的收发逻辑。当收到音视频数据时,可以将数据转发给所有连接的WebSocket客户端。例如: ```java @Component @ServerEndpoint("/video-chat") public class VideoChatHandler { private static final Logger LOGGER = LoggerFactory.getLogger(VideoChatHandler.class); private List<Session> sessions = new CopyOnWriteArrayList<>(); @OnOpen public void onOpen(Session session) { LOGGER.info("WebSocket opened: {}", session.getId()); sessions.add(session); } @OnMessage public void onMessage(ByteBuffer buffer, Session session) throws IOException { LOGGER.info("Received video data from {}", session.getId()); byte[] data = new byte[buffer.remaining()]; buffer.get(data); for (Session s : sessions) { if (s.isOpen() && !s.getId().equals(session.getId())) { s.getBasicRemote().sendBinary(ByteBuffer.wrap(data)); } } } @OnClose public void onClose(Session session) { LOGGER.info("WebSocket closed: {}", session.getId()); sessions.remove(session); } @OnError public void onError(Throwable error) { LOGGER.error("WebSocket error", error); } } ``` 6. 在前端页面中使用WebSocket来实现音视频通话。可以使用WebRTC等技术来实现音视频采集、编解码、传输等功能。这里不再赘述。 以上就是一个简单的局域网音视频通话的实现过程。需要注意的是,音视频通话涉及到的技术较多,需要根据实际情况进行选择和配置。
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