springboot启动报错Error creating bean with name requestMappingHandlerMapping defined in class path resou

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### Spring Boot WebSocket Bean Creation Error When encountering an error while creating a bean named `webSocketHandlerMapping` in a Spring Boot application using WebSocket, several factors could contribute to this issue. The configuration settings provided offer insights into resource handling but do not directly address WebSocket configurations[^1]. However, understanding how beans are configured and managed within the context of WebSockets is crucial. In Spring Boot applications utilizing WebSocket, ensuring proper registration of handlers and mappings plays a vital role. If there's an error during the creation of the `webSocketHandlerMapping` bean, it often indicates misconfiguration or missing dependencies related specifically to WebSocket support rather than general resource management settings mentioned earlier. To resolve issues surrounding the creation of the `webSocketHandlerMapping` bean: - Verify that all necessary WebSocket-related dependencies have been included in the project’s build file (e.g., Maven POM or Gradle). - Ensure correct annotations such as `@EnableWebSocket`, along with appropriate handler classes implementing interfaces like `WebSocketHandler`. - Check for any conflicting configurations between standard MVC components and those specific to WebSocket functionality. Additionally, when configuring controllers interacting over WebSocket connections, consider patterns similar to RESTful service implementations where methods respond appropriately based on incoming requests[^2]: ```java @Configuration @EnableWebSocket public class WebSocketConfig implements WebSocketConfigurer { @Override public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) { registry.addHandler(myWebSocketHandler(), "/ws").setAllowedOrigins("*"); } @Bean public MyWebSocketHandler myWebSocketHandler() { return new MyWebSocketHandler(); } } ``` For comprehensive testing purposes concerning asynchronous behaviors associated with WebSocket communications, tools listed provide valuable assistance through simplifying test scenarios involving concurrency and network interactions without relying solely upon actual external services[^3]: ```java // Example Test Using Awaitility for Asynchronous Operations Verification @Test public void shouldReceiveMessageViaWebSocket() throws Exception { given(). contentType(JSON). body(new Message("test"). expect(). statusCode(200); await().atMost(5, TimeUnit.SECONDS).until(() -> !receivedMessages.isEmpty()); } ```