Java Socket与Html5 websocket通信

喜欢ヅ旅行 2023-09-30 14:11 8阅读 0赞

一、Mysocket.java文件

import org.springframework.stereotype.Component;
    
    import javax.websocket.*;
    import javax.websocket.server.*;
    
    // ws://localhost:8080/ws/Tom
    @ServerEndpoint("/ws/{user}")
    @Component
    public class MySocket {
        
        private String currentUser;
    
        //连接打开时执行
        @OnOpen
        public void onOpen(@PathParam("user") String user, Session session) {
        
            currentUser = user;
            System.out.println("新用户进入：" + user + "，ID：" + session.getId());
        }
    
        //收到消息时执行
        @OnMessage
        public String onMessage(String message, Session session) {
        
            System.out.println(currentUser + "：" + message);
            return currentUser + "：" + message;
        }
    
        //连接关闭时执行
        @OnClose
        public void onClose(Session session, CloseReason closeReason) {
        
            System.out.println("用户" + session.getId() + "已退出！");
        }
    
        //连接错误时执行
        @OnError
        public void onError(Throwable t) {
        
            t.printStackTrace();
        }
    }

这里需要注意添加

@ServerEndpoint
    @Component

二、DemoApplication.java文件

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.socket.server.standard.ServerEndpointExporter;
    
    @SpringBootApplication
    public class DemoApplication {
        
    
        public static void main(String[] args) {
        
            SpringApplication.run(DemoApplication.class, args);
        }
    
        @Bean
        public ServerEndpointExporter serverEndpointExporter() {
        
            return new ServerEndpointExporter();
        }
    }

这里注意需要添加

@Bean
    public ServerEndpointExporter serverEndpointExporter() {
        
        return new ServerEndpointExporter();
    }

三、pom.xml需要添加依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-websocket</artifactId>
        <version>4.3.8.RELEASE</version>
    </dependency>

四、前端

五、编写工程中碰到过的问题

问题：WebSocket connection to ‘ws://localhost:8080/ws/Tom’ failed: Error during WebSocket handshake: Unexpected response code: 404

这个需要添加上边那个@Bean和@Component的代码