postgresql做网站用什么环境,怎样开通app软件,网站上传的图片怎么做的清晰,宣传片拍摄合同背景 springboot 中使用okhttp3创建webSocket服务端 server1 和客户端 client1#xff0c;客户端clinet1调用server1用于发送图片#xff0c;创建客户端client2接收此图片. 在Spring Boot中使用OkHttp3创建WebSocket服务端和客户端#xff0c;涉及到两个不同的操作#xff…背景 springboot 中使用okhttp3创建webSocket服务端 server1 和客户端 client1客户端clinet1调用server1用于发送图片创建客户端client2接收此图片. 在Spring Boot中使用OkHttp3创建WebSocket服务端和客户端涉及到两个不同的操作建立WebSocket服务端和创建WebSocket客户端。OkHttp3库主要用于客户端操作因此对于服务端我们将使用Spring的WebSocket支持。 步骤 1: 创建WebSocket服务端Server1
添加Spring WebSocket依赖
在pom.xml中添加Spring Boot的WebSocket依赖
dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-websocket/artifactId
/dependency配置WebSocket
创建一个配置类来启用WebSocket并注册一个endpoint
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;Configuration
EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {Overridepublic void registerStompEndpoints(StompEndpointRegistry registry) {registry.addEndpoint(/ws).setAllowedOrigins(*).withSockJS();}Overridepublic void configureMessageBroker(MessageBrokerRegistry registry) {registry.enableSimpleBroker(/topic);registry.setApplicationDestinationPrefixes(/app);}
}创建消息处理器
创建一个控制器来处理发送到服务端的消息
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;Controller
public class ImageMessageController {MessageMapping(/receive-image)SendTo(/topic/image)public byte[] receiveImage(byte[] imageData) {// 处理接收到的图片数据return imageData; // 将图片数据转发到订阅了 /topic/image 的客户端}
}步骤 2: 创建WebSocket客户端Client1
添加OkHttp依赖
在pom.xml中添加OkHttp3依赖
dependencygroupIdcom.squareup.okhttp3/groupIdartifactIdokhttp/artifactIdversion4.9.0/version !-- 请使用最新版本 --
/dependency创建WebSocket客户端
创建一个客户端来连接到WebSocket服务端并发送图片
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.WebSocket;
import okhttp3.WebSocketListener;
import okio.ByteString;public class ImageWebSocketClient extends WebSocketListener {private final OkHttpClient client new OkHttpClient();private WebSocket webSocket;public void connect(String url) {Request request new Request.Builder().url(url).build();webSocket client.newWebSocket(request, this);}public void sendImage(byte[] imageData) {if (webSocket ! null) {webSocket.send(ByteString.of(imageData));}}Overridepublic void onOpen(WebSocket webSocket, okhttp3.Response response) {super.onOpen(webSocket, response);// WebSocket连接成功建立}Overridepublic void onMessage(WebSocket webSocket, ByteString bytes) {super.onMessage(webSocket, bytes);// 处理接收到的二进制消息}Overridepublic void onClosed(WebSocket webSocket, int code, String reason) {super.onClosed(webSocket, code, reason);// 处理WebSocket关闭事件}Overridepublic void onFailure(WebSocket webSocket, Throwable t, okhttp3.Response response) {super.onFailure(webSocket, t, response);// 处理WebSocket连接失败事件}public void close() {if (webSocket ! null) {webSocket.close(1000, End of session);}}
}步骤 3: 创建另一个客户端Client2
创建另一个客户端来接收由Client1发送的图片
public class ImageReceivingClient extends WebSocketListener {private final OkHttpClient client new OkHttpClient();private WebSocket webSocket;public void connect(String url) {Request request new Request.Builder().url(url).build();webSocket client.newWebSocket(request, this);}Overridepublic void onMessage(WebSocket webSocket, ByteString bytes) {super.onMessage(webSocket, bytes);// 处理接收到的图片数据byte[] imageData bytes.toByteArray();// 可以在这里将图片数据保存到文件或进行其他处理}public void close() {if (webSocket ! null) {webSocket.close(1000, End of session);}}
}步骤 4: 使用客户端
在你的服务中使用上面创建的ImageWebSocketClient和ImageReceivingClient来发送和接收图片。
public class WebSocketService {public void sendImage(String url, byte[] imageData) {ImageWebSocketClient client new ImageWebSocketClient();client.connect(url);client.sendImage(imageData);client.close();}public void receiveImage(String url) {ImageReceivingClient client new ImageReceivingClient();client.connect(url);// 保持连接直到需要断开}
}注意事项
确保WebSocket服务端和客户端使用相同的协议ws://或wss://。在生产环境中确保使用wss://来加密WebSocket连接。处理WebSocket连接的异常和错误确保应用的健壮性。
