啟用 STOMP

STOMP over WebSocket 支援可在 spring-messaging 和 spring-websocket 模組中獲取。一旦擁有這些依賴項，就可以透過 WebSocket 公開 STOMP 端點，如以下示例所示

Java
Kotlin
Xml

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfiguration implements WebSocketMessageBrokerConfigurer {

	@Override
	public void registerStompEndpoints(StompEndpointRegistry registry) {
		// /portfolio is the HTTP URL for the endpoint to which a WebSocket (or SockJS)
		// client needs to connect for the WebSocket handshake
		registry.addEndpoint("/portfolio");
	}

	@Override
	public void configureMessageBroker(MessageBrokerRegistry config) {
		// STOMP messages whose destination header begins with /app are routed to
		// @MessageMapping methods in @Controller classes
		config.setApplicationDestinationPrefixes("/app");
		// Use the built-in message broker for subscriptions and broadcasting and
		// route messages whose destination header begins with /topic or /queue to the broker
		config.enableSimpleBroker("/topic", "/queue");
	}
}

@Configuration
@EnableWebSocketMessageBroker
class WebSocketConfiguration : WebSocketMessageBrokerConfigurer {

	override fun registerStompEndpoints(registry: StompEndpointRegistry) {
		// /portfolio is the HTTP URL for the endpoint to which a WebSocket (or SockJS)
		// client needs to connect for the WebSocket handshake
		registry.addEndpoint("/portfolio")
	}

	override fun configureMessageBroker(config: MessageBrokerRegistry) {
		// STOMP messages whose destination header begins with /app are routed to
		// @MessageMapping methods in @Controller classes
		config.setApplicationDestinationPrefixes("/app")
		// Use the built-in message broker for subscriptions and broadcasting and
		// route messages whose destination header begins with /topic or /queue to the broker
		config.enableSimpleBroker("/topic", "/queue")
	}
}

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xmlns:websocket="http://www.springframework.org/schema/websocket"
	   xsi:schemaLocation="
			http://www.springframework.org/schema/beans
			https://www.springframework.org/schema/beans/spring-beans.xsd
			http://www.springframework.org/schema/websocket
			https://www.springframework.org/schema/websocket/spring-websocket.xsd">

	<websocket:message-broker application-destination-prefix="/app">
		<websocket:stomp-endpoint path="/portfolio" />
		<websocket:simple-broker prefix="/topic, /queue"/>
	</websocket:message-broker>

</beans>

對於內建的簡單代理，/topic 和 /queue 字首沒有任何特殊含義。它們僅僅是區分發布-訂閱訊息與點對點訊息（即，許多訂閱者與一個消費者）的約定。當您使用外部代理時，請檢視代理的 STOMP 頁面以瞭解它支援哪種 STOMP 目標和字首。

要從瀏覽器連線 STOMP，您可以使用 stomp-js/stompjs，它是最活躍的 JavaScript 庫。

以下示例程式碼基於它

const stompClient = new StompJs.Client({
	brokerURL: 'ws://domain.com/portfolio',
	onConnect: () => {
		// ...
	}
});

或者，如果您透過 SockJS 連線，您可以在伺服器端使用 registry.addEndpoint("/portfolio").withSockJS() 啟用 SockJS 回退，並在 JavaScript 端按照這些說明進行操作。

請注意，前面示例中的 stompClient 無需指定 login 和 passcode 標頭。即使指定了，它們也會在伺服器端被忽略（或者說被覆蓋）。有關身份驗證的更多資訊，請參閱連線到代理和身份驗證。

有關更多示例程式碼，請參閱

使用 WebSocket 構建互動式 Web 應用程式 — 入門指南。
股票投資組合 — 一個示例應用程式。