启用 STOMP

STOMP over WebSocket 支持可在 spring-messaging 和 spring-websocket 模块中获取。一旦拥有这些依赖项，就可以通过 WebSocket 公开 STOMP 端点，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>

对于内置的简单代理，/topic 和 /queue 前缀没有任何特殊含义。它们仅仅是区分发布-订阅消息与点对点消息（即，许多订阅者与一个消费者）的约定。当您使用外部代理时，请查看代理的 STOMP 页面以了解它支持哪种 STOMP 目标和前缀。

要从浏览器连接 STOMP，您可以使用 stomp-js/stompjs，它是最活跃的 JavaScript 库。

以下示例代码基于它

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

或者，如果您通过 SockJS 连接，您可以在服务器端使用 registry.addEndpoint("/portfolio").withSockJS() 启用 SockJS 回退，并在 JavaScript 端按照这些说明进行操作。

请注意，前面示例中的 stompClient 无需指定 login 和 passcode 标头。即使指定了，它们也会在服务器端被忽略（或者说被覆盖）。有关身份验证的更多信息，请参阅连接到代理和身份验证。

有关更多示例代码，请参阅

使用 WebSocket 构建交互式 Web 应用程序 — 入门指南。
股票投资组合 — 一个示例应用程序。