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小伙伴们，你们好呀，我是老寇，跟我一起学习使用Vertx实现UDP-Server

实现UDP【响应式】

Vertx-Core地址

注意

UDP是无连接的传输，这意味着您与远程客户端没有建立持续的连接。

所以，您发送和接收的数据包都要包含有远程的地址。

除此之外，UDP不像TCP的使用那样安全， 这也就意味着不能保证发送的数据包一定会被对应的接收端（Endpoint）接收。【传输数据时不建立连接，因此可能导致数据包丢失】

UDP最适合一些允许丢弃数据包的应用（如监视应用程序，视频直播）。

实现过程

查看源码

代码比较简单，懒得讲解啦

代码比较简单，懒得讲解啦

代码比较简单，懒得讲解啦

服务端

引入依赖

<dependency><groupId>io.vertx</groupId><artifactId>vertx-core</artifactId><version>5.0.0</version>
</dependency>

UdpServerProperties

/*** @author laokou*/
@Data
@Component
@ConfigurationProperties(prefix = "spring.udp-server")
public class UdpServerProperties {private String host = "0.0.0.0";private Set<Integer> ports = new HashSet<>(0);private boolean broadcast = false;private boolean loopbackModeDisabled = true;private String multicastNetworkInterface = null;private boolean ipV6 = false;}

VertxUdpServer

/*** @author laokou*/
@Slf4j
public final class VertxUdpServer extends AbstractVerticle {private volatile Flux<DatagramSocket> datagramSocket;private final UdpServerProperties udpServerProperties;private boolean isClosed = false;VertxUdpServer(Vertx vertx, UdpServerProperties udpServerProperties) {this.udpServerProperties = udpServerProperties;this.vertx = vertx;}@Overridepublic synchronized void start() {datagramSocket = Flux.fromIterable(udpServerProperties.getPorts()).map(port -> {DatagramSocket datagramSocket = vertx.createDatagramSocket(getDatagramSocketOption()).handler(packet -> log.info("【Vertx-UDP-Server】 => 收到数据包：{}", packet.data()));datagramSocket.listen(port, udpServerProperties.getHost()).onComplete(result -> {if (isClosed) {return;}if (result.succeeded()) {log.info("【Vertx-UDP-Server】 => UDP服务启动成功，端口：{}", port);}else {Throwable ex = result.cause();log.error("【Vertx-UDP-Server】 => UDP服务启动失败，错误信息：{}", ex.getMessage(), ex);}});return datagramSocket;});datagramSocket.subscribeOn(Schedulers.boundedElastic()).subscribe();}@Overridepublic synchronized void stop() {isClosed = true;datagramSocket.doOnNext(socket -> socket.close().onComplete(result -> {if (result.succeeded()) {log.info("【Vertx-UDP-Server】 => UDP服务停止成功");}else {Throwable ex = result.cause();log.error("【Vertx-UDP-Server】 => UDP服务停止失败，错误信息：{}", ex.getMessage(), ex);}})).subscribeOn(Schedulers.boundedElastic()).subscribe();}public void deploy() {// 部署服务vertx.deployVerticle(this);// 停止服务Runtime.getRuntime().addShutdownHook(new Thread(this::stop));}private DatagramSocketOptions getDatagramSocketOption() {DatagramSocketOptions datagramSocketOptions = new DatagramSocketOptions();datagramSocketOptions.setBroadcast(udpServerProperties.isBroadcast());datagramSocketOptions.setLoopbackModeDisabled(udpServerProperties.isLoopbackModeDisabled());datagramSocketOptions.setMulticastNetworkInterface(udpServerProperties.getMulticastNetworkInterface());datagramSocketOptions.setIpV6(udpServerProperties.isIpV6());return datagramSocketOptions;}}

VertxUdpServerManager

/*** @author laokou*/
public final class VertxUdpServerManager {private VertxUdpServerManager() {}public static void deploy(final Vertx vertx, final UdpServerProperties properties) {new VertxUdpServer(vertx, properties).deploy();}}

客户端【测试】

/*** @author laokou*/
@Slf4j
@SpringBootTest
@RequiredArgsConstructor
@TestConstructor(autowireMode = TestConstructor.AutowireMode.ALL)
class UdpTest {private final Vertx vertx;@Testvoid test() throws InterruptedException {for (int i = 4880; i < 5000; i++) {DatagramSocket datagramSocket = vertx.createDatagramSocket();int finalI = i;datagramSocket.send("Hello Vertx", i, "127.0.0.1").onComplete(result -> {if (result.succeeded()) {log.info("【Vertx-UDP-Client】 => 发送成功，端口：{}", finalI);}else {Throwable ex = result.cause();log.error("【Vertx-UDP-Client】 => 发送失败，端口：{}，错误信息：{}", finalI, ex.getMessage(), ex);}});Thread.sleep(2000);Assertions.assertDoesNotThrow(datagramSocket::close);}}}

这可以满足基本的协议开发，自行修改即可！！！

我是老寇，我们下次再见啦！