1、Java原生实现
1.1、导入紧张依靠
- <!-- Java原生代码实现websocket依赖 -->
- <dependency>
- <groupId>org.java-websocket</groupId>
- <artifactId>Java-WebSocket</artifactId>
- <version>1.5.3</version>
- </dependency>
复制代码 1.2、继承WebSocketServer
- import java.net.InetSocketAddress;
- import java.net.UnknownHostException;
- import org.java_websocket.WebSocket;
- import org.java_websocket.handshake.ClientHandshake;
- import org.java_websocket.server.WebSocketServer;
- /**
- * @author HTL
- * @version 2024-7-8 008
- * @since JDK8
- */
- public class SocketServer extends WebSocketServer {
- public SocketServer(int port) throws UnknownHostException {
- super(new InetSocketAddress(port));
- }
- public SocketServer(InetSocketAddress address) {
- super(address);
- }
- @Override
- public void onOpen(WebSocket conn, ClientHandshake handshake) {
- conn.send("Welcome to the server!"); // This method sends a message to the new client
- broadcast("new connection: " + handshake
- .getResourceDescriptor()); // This method sends a message to all clients connected
- System.out.println(
- conn.getRemoteSocketAddress().getAddress().getHostAddress() + " entered the room!");
- }
- @Override
- public void onClose(WebSocket conn, int code, String reason, boolean remote) {
- broadcast(conn + " has left the room!");
- System.out.println(conn + " has left the room!");
- }
-
- @Override
- public void onMessage(WebSocket conn, String message) {
- broadcast(message);
- System.out.println(conn + " 发送数据: " + message);
- }
- @Override
- public void onError(WebSocket conn, Exception ex) {
- ex.printStackTrace();
- if (conn != null) {
- // some errors like port binding failed may not be assignable to a specific
- // websocket
- }
- }
- @Override
- public void onStart() {
- System.out.println("Server started!");
- setConnectionLostTimeout(0);
- setConnectionLostTimeout(100);
- }
- }
复制代码 1.3、测试
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStreamReader;
- /**
- * @author HTL
- * @version 2024-7-8 008
- * @since JDK8
- */
- public class SocketTest {
- public static void main(String[] args) throws InterruptedException, IOException {
- int port = 8887; // 端口
- SocketServer s = new SocketServer(port);
- s.start();
- System.out.println("ChatServer started on port: " + s.getPort());
- BufferedReader sysin = new BufferedReader(new InputStreamReader(System.in));
- while (true) {
- String in = sysin.readLine();
- s.broadcast(in);
- if (in.equals("exit")) {
- s.stop(1000);
- break;
- }
- }
- }
- }
复制代码- # 请求地址
- ws://127.0.0.1:8887
复制代码 2、SpringBoot实现
2.1、导入依靠
- <!-- 2、SpringBoot实现websocket 依赖 -->
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-websocket</artifactId>
- </dependency>
复制代码 2.2、编写配置类
- import org.springframework.web.socket.WebSocketSession;
- import java.io.IOException;
- import java.util.concurrent.ConcurrentHashMap;
- /**
- * @author HTL
- * @version 2024-7-4 004
- * @since JDK8
- */
- public class WsSessionManager {
- /**
- * 保存连接 session 的地方
- */
- private static ConcurrentHashMap<String, WebSocketSession> SESSION_POOL = new ConcurrentHashMap<>();
- /**
- * 添加 session
- *
- * @param key
- */
- public static void add(String key, WebSocketSession session) {
- // 添加 session
- SESSION_POOL.put(key, session);
- }
- /**
- * 删除 session,会返回删除的 session
- *
- * @param key
- * @return
- */
- public static WebSocketSession remove(String key) {
- // 删除 session
- return SESSION_POOL.remove(key);
- }
- /**
- * 删除并同步关闭连接
- *
- * @param key
- */
- public static void removeAndClose(String key) {
- WebSocketSession session = remove(key);
- if (session != null) {
- try {
- // 关闭连接
- session.close();
- } catch (IOException e) {
- // todo: 关闭出现异常处理
- e.printStackTrace();
- }
- }
- }
- /**
- * 获得 session
- *
- * @param key
- * @return
- */
- public static WebSocketSession get(String key) {
- // 获得 session
- return SESSION_POOL.get(key);
- }
- }
复制代码 继承TextWebSocketHandler
- import org.springframework.stereotype.Component;
- import org.springframework.web.socket.CloseStatus;
- import org.springframework.web.socket.TextMessage;
- import org.springframework.web.socket.WebSocketSession;
- import org.springframework.web.socket.handler.TextWebSocketHandler;
- import java.text.SimpleDateFormat;
- import java.time.LocalDateTime;
- import java.util.Date;
- /**
- * @author HTL
- * @version 2024-7-4 004
- * @since JDK8
- */
- @Component
- public class HttpAuthHandler extends TextWebSocketHandler {
- /**
- * socket 建立成功事件
- *
- * @param session
- * @throws Exception
- */
- @Override
- public void afterConnectionEstablished(WebSocketSession session) throws Exception {
- Object sessionId = session.getAttributes().get("session_id");
- if (sessionId != null) {
- // 用户连接成功,放入在线用户缓存
- WsSessionManager.add(sessionId.toString(), session);
- } else {
- throw new RuntimeException("用户登录已经失效!");
- }
- }
- /**
- * 接收消息事件
- *
- * @param session
- * @param message
- * @throws Exception
- */
- @Override
- protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
- // 获得客户端传来的消息
- String payload = message.getPayload();
- Object sessionId = session.getAttributes().get("session_id");
- SimpleDateFormat myFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- myFormat.format(new Date());
- System.out.println(myFormat.format(new Date()) + " ——> server 接收到:" + sessionId + " 发送的内容:" + payload);
- session.sendMessage(new TextMessage(myFormat.format(new Date()) + " ——> server 返回给:" + sessionId + " 的消息:" + payload));
- }
- /**
- * socket 断开连接时
- *
- * @param session
- * @param status
- * @throws Exception
- */
- @Override
- public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
- Object sessionId = session.getAttributes().get("session_id");
- if (sessionId != null) {
- // 用户退出,移除缓存
- WsSessionManager.remove(sessionId.toString());
- }
- }
- }
复制代码 实现HandshakeInterceptor
- import java.util.Map;
- import org.apache.logging.log4j.util.Strings;
- import org.springframework.http.server.ServerHttpRequest;
- import org.springframework.http.server.ServerHttpResponse;
- import org.springframework.stereotype.Component;
- import org.springframework.web.socket.WebSocketHandler;
- import org.springframework.web.socket.server.HandshakeInterceptor;
- /**
- * @author HTL
- * @version 2024-7-4 004
- * @since JDK8
- */
- @Component
- public class MyInterceptor implements HandshakeInterceptor {
- /**
- * 握手前
- */
- @Override
- public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
- System.out.println("握手开始");
- String hostName = request.getRemoteAddress().getHostName();
- String sessionId = hostName+String.valueOf((int)(Math.random()*1000));
- if (Strings.isNotBlank(sessionId)) {
- // 放入属性域
- attributes.put("session_id", sessionId);
- System.out.println("用户 session_id:" + sessionId + " 握手成功!");
- return true;
- }
- System.out.println("用户登录已失效");
- return false;
- }
- /**
- * 握手后
- */
- @Override
- public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {
- System.out.println("握手完成");
- }
- }
复制代码- import org.springframework.beans.factory.annotation.Autowired;
- 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;
- /**
- * @author HTL
- * @version 2024-7-4 004
- * @since JDK8
- */
- @Configuration
- @EnableWebSocket
- public class WebsocketConfig implements WebSocketConfigurer {
- @Autowired
- private HttpAuthHandler httpAuthHandler;
- @Autowired
- private MyInterceptor myInterceptor;
- @Override
- public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
- registry
- .addHandler(httpAuthHandler, "myWS")//请求地址前缀
- .addInterceptors(myInterceptor)
- .setAllowedOrigins("*");
- }
- }
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