基于若依框架开发WebSocket接口
添加依赖
在项目的pom.xml文件中添加WebSocket依赖。若依框架默认可能未包含WebSocket支持，需手动引入：
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
配置WebSocket
创建配置类启用WebSocket支持，并注册WebSocket处理器：
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {@Overridepublic void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {registry.addHandler(myWebSocketHandler(), "/ws").setAllowedOrigins("*");}@Beanpublic WebSocketHandler myWebSocketHandler() {return new MyWebSocketHandler();}
}
实现WebSocket处理器
自定义处理器继承TextWebSocketHandler，处理连接、消息和关闭事件：
public class MyWebSocketHandler extends TextWebSocketHandler {private static final Set<WebSocketSession> sessions = new CopyOnWriteArraySet<>();@Overridepublic void afterConnectionEstablished(WebSocketSession session) {sessions.add(session);System.out.println("New connection: " + session.getId());}@Overrideprotected void handleTextMessage(WebSocketSession session, TextMessage message) {System.out.println("Received message: " + message.getPayload());for (WebSocketSession s : sessions) {try {s.sendMessage(new TextMessage("Echo: " + message.getPayload()));} catch (IOException e) {e.printStackTrace();}}}@Overridepublic void afterConnectionClosed(WebSocketSession session, CloseStatus status) {sessions.remove(session);System.out.println("Connection closed: " + session.getId());}
}
前端连接WebSocket
在Vue或HTML页面中建立WebSocket连接：
const socket = new WebSocket('ws://localhost:8080/ws');
socket.onopen = function() {console.log('WebSocket connected');socket.send('Hello Server');
};
socket.onmessage = function(event) {console.log('Message from server: ', event.data);
};
若依集成注意事项
- 权限控制：若需结合若依的权限系统，可在WebSocket握手时验证Token，例如通过
HandshakeInterceptor。 - 消息广播：结合Redis发布订阅功能实现集群环境下的消息广播。
- 心跳检测：客户端需定期发送心跳包，避免连接被意外关闭。
示例：握手拦截器
添加权限验证拦截器：
public class AuthHandshakeInterceptor implements HandshakeInterceptor {@Overridepublic boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) {String token = ((ServletServerHttpRequest) request).getServletRequest().getParameter("token");// 验证Token逻辑return true; // 验证通过返回true}@Overridepublic void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {}
}
在配置类中注册拦截器：
registry.addHandler(myWebSocketHandler(), "/ws").addInterceptors(new AuthHandshakeInterceptor()).setAllowedOrigins("*");
通过以上步骤，即可在若依框架中实现基础的WebSocket通信功能。