要在Spring Boot中集成WebSocket实现消息推送,可以按照以下步骤进行操作:
pom.xml
文件中添加以下依赖:<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
WebSocketConfigurer
接口,并实现registerWebSocketHandlers
方法。在该方法中,配置WebSocket处理器和拦截器。@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(myWebSocketHandler(), "/websocket").addInterceptors(new WebSocketInterceptor());
}
@Bean
public WebSocketHandler myWebSocketHandler() {
return new MyWebSocketHandler();
}
}
WebSocketHandler
接口,并重写相应的方法。public class MyWebSocketHandler extends TextWebSocketHandler {
private static final Set<WebSocketSession> sessions = Collections.synchronizedSet(new HashSet<>());
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
sessions.add(session);
}
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
// 处理收到的消息
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
sessions.remove(session);
}
}
HandshakeInterceptor
接口,并重写相应的方法。public class WebSocketInterceptor implements HandshakeInterceptor {
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
// 在握手前执行操作
return true;
}
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {
// 在握手后执行操作
}
}
sendMessage
方法发送消息。@Autowired
private SimpMessagingTemplate messagingTemplate;
public void sendMessage(String message) {
messagingTemplate.convertAndSend("/topic/message", message);
}
以上步骤完成后,你就可以使用WebSocket在Spring Boot中实现消息推送了。在前端页面中,可以使用JavaScript的new WebSocket(url)
创建WebSocket连接,并通过onmessage
事件接收到推送的消息。
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