android为服务端与springboot为客户端使用websocket进行交互,请将全部步骤以及代码写出来
时间: 2023-07-16 12:14:20 浏览: 182
以下是使用 Android 作为 WebSocket 服务端,Spring Boot 作为客户端的示例代码:
首先是 Android 作为 WebSocket 服务端的代码:
```java
import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
@ServerEndpoint("/websocket")
public class WebSocketServer {
private static Set<Session> clients = Collections.synchronizedSet(new HashSet<Session>());
@OnOpen
public void onOpen(Session session) {
clients.add(session);
}
@OnMessage
public void onMessage(String message, Session session) throws IOException {
for (Session client : clients) {
if (!client.equals(session)) {
client.getBasicRemote().sendText(message);
}
}
}
@OnClose
public void onClose(Session session) {
clients.remove(session);
}
}
```
接下来是 Spring Boot 作为 WebSocket 客户端的代码:
首先需要引入 Spring Boot 的 WebSocket 依赖:
```xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
```
然后创建一个 WebSocket 客户端类:
```java
import org.springframework.messaging.converter.StringMessageConverter;
import org.springframework.messaging.simp.stomp.StompSession;
import org.springframework.messaging.simp.stomp.StompSessionHandler;
import org.springframework.messaging.simp.stomp.StompSessionHandlerAdapter;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.client.standard.StandardWebSocketClient;
import org.springframework.web.socket.messaging.WebSocketStompClient;
@Component
public class WebSocketClient {
private static final String WS_URL = "ws://localhost:8080/websocket";
private StompSession session;
public void connect() {
WebSocketStompClient stompClient = new WebSocketStompClient(new StandardWebSocketClient());
stompClient.setMessageConverter(new StringMessageConverter());
StompSessionHandler sessionHandler = new StompSessionHandlerAdapter() {};
session = stompClient.connect(WS_URL, sessionHandler).get();
}
public void disconnect() {
session.disconnect();
}
public void send(String message) {
session.send("/app/message", message);
}
}
```
在上面的代码中,我们使用了 Spring Boot 的 WebSocketStompClient 来连接 WebSocket 服务端,并使用 StompSessionHandler 来处理 WebSocket 连接事件和消息事件。
最后,在 Spring Boot 的控制器中注入 WebSocketClient 并使用:
```java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
@Controller
public class MessageController {
@Autowired
private WebSocketClient webSocketClient;
@MessageMapping("/message")
@SendTo("/topic/messages")
public String handleMessage(String message) {
webSocketClient.send(message);
return message;
}
}
```
在上面的代码中,我们将收到的消息通过 WebSocketClient 发送给 WebSocket 服务端,并返回消息到 /topic/messages 上供客户端订阅。
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