tomcat springMVC websocket 的开发示例
时间: 2023-11-20 10:13:31 浏览: 113
好的,这是一个基于Tomcat、Spring MVC和WebSocket的简单示例:
首先,需要在pom.xml文件中添加以下依赖:
```xml
<!-- Tomcat embedded -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-websocket</artifactId>
<version>9.0.30</version>
</dependency>
<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.5.RELEASE</version>
</dependency>
```
接下来,创建一个WebSocket处理程序类,例如:
```java
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 MyWebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(new MyWebSocketHandler(), "/websocket");
}
}
```
在这个例子中,我们创建了一个名为`MyWebSocketHandler`的WebSocket处理程序,并将其映射到`/websocket`路径。接下来,我们需要实现WebSocket处理程序类:
```java
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 {
String payload = message.getPayload();
session.sendMessage(new TextMessage("Received: " + payload));
}
}
```
在这个例子中,我们简单地回显任何发送到WebSocket服务器的消息。
最后,在Spring MVC控制器中,我们可以将WebSocket连接注入到请求处理方法中,例如:
```java
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
@Controller
public class MyController {
private TextWebSocketHandler myWebSocketHandler;
public MyController(TextWebSocketHandler myWebSocketHandler) {
this.myWebSocketHandler = myWebSocketHandler;
}
@RequestMapping(value = "/websocket-test", method = RequestMethod.GET)
@ResponseBody
public String testWebSocket(WebSocketSession session) {
myWebSocketHandler.handleTextMessage(session, new TextMessage("Test message"));
return "Message sent";
}
}
```
在这个例子中,我们注入了一个名为`myWebSocketHandler`的WebSocket处理程序,并在请求处理方法中使用它来发送测试消息。
这就是一个简单的Tomcat、Spring MVC和WebSocket示例。它可以让你开始理解如何使用这些技术来开发WebSocket应用程序。
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