Spring Boot提供了对WebSocket的支持，使得实现实时的双向通信变得更加容易。
详细步骤如下：
1. 添加WebSocket依赖
在 pom.xml 文件中添加Spring WebSocket的依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
2. 创建WebSocket配置类
创建一个WebSocket配置类，用于注册WebSocket端点和消息处理器：
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(new MyWebSocketHandler(), "/ws").setAllowedOrigins("*");
}
}
3. 创建WebSocket处理器
创建一个WebSocket处理器来处理WebSocket消息：
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
public class MyWebSocketHandler extends TextWebSocketHandler {
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
// 处理收到的消息
String payload = message.getPayload();
session.sendMessage(new TextMessage("Received: " + payload));
}
}
4. 在前端页面使用WebSocket
在前端页面中使用JavaScript来连接WebSocket并发送/接收消息：
var socket = new WebSocket("ws://localhost:8080/ws");
socket.onopen = function() {
console.log("WebSocket connection established.");
};
socket.onmessage = function(event) {
console.log("Message received: " + event.data);
};
function sendMessage() {
var message = "Hello, WebSocket!";
socket.send(message);
}
通过以上步骤，可以实现基本的WebSocket支持。WebSocket使得在Web应用中实现实时的双向通信变得更加简单和高效。
原文链接: https://blog.csdn.net/2401_82884096/article/details/138335181