53 lines
1.8 KiB
Java
53 lines
1.8 KiB
Java
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package org.example;
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import javax.websocket.OnClose;
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import javax.websocket.OnMessage;
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import javax.websocket.OnOpen;
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import javax.websocket.Session;
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import javax.websocket.server.ServerEndpoint;
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import java.io.IOException;
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import java.util.Set;
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import java.util.concurrent.CopyOnWriteArraySet;
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@javax.websocket.server.ServerEndpoint("/ws")
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public class WsServer {
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private static final Set<javax.websocket.Session> sessions = new CopyOnWriteArraySet<>();
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@javax.websocket.OnOpen
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public void onOpen(javax.websocket.Session session) {
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sessions.add(session);
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System.out.println("WebSocket连接已建立: " + session.getId());
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// 推送扫码枪列表给前端
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String deviceListJson = org.example.Main.getDeviceListJson();
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try {
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System.out.println("发送消息到前端");
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session.getBasicRemote().sendText(deviceListJson);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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@javax.websocket.OnMessage
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public void onMessage(String message, javax.websocket.Session session) throws IOException {
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System.out.println("收到消息: " + message);
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session.getBasicRemote().sendText("服务器已收到: " + message);
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}
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@javax.websocket.OnClose
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public void onClose(javax.websocket.Session session) {
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sessions.remove(session);
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System.out.println("WebSocket连接已关闭: " + session.getId());
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}
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public static void broadcast(String message) {
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for (javax.websocket.Session session : sessions) {
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if (session.isOpen()) {
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try {
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session.getBasicRemote().sendText(message);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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