扫码枪页面

scaner/src/main/java/org/example/WsServer.java

@@ -0,0 +1,53 @@
+package org.example;
+
+import javax.websocket.OnClose;
+import javax.websocket.OnMessage;
+import javax.websocket.OnOpen;
+import javax.websocket.Session;
+import javax.websocket.server.ServerEndpoint;
+import java.io.IOException;
+import java.util.Set;
+import java.util.concurrent.CopyOnWriteArraySet;
+
+@javax.websocket.server.ServerEndpoint("/ws")
+public class WsServer {
+    private static final Set<javax.websocket.Session> sessions = new CopyOnWriteArraySet<>();
+
+    @javax.websocket.OnOpen
+    public void onOpen(javax.websocket.Session session) {
+        sessions.add(session);
+        System.out.println("WebSocket连接已建立: " + session.getId());
+        // 推送扫码枪列表给前端
+        String deviceListJson = org.example.Main.getDeviceListJson();
+        try {
+            System.out.println("发送消息到前端");
+            session.getBasicRemote().sendText(deviceListJson);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @javax.websocket.OnMessage
+    public void onMessage(String message, javax.websocket.Session session) throws IOException {
+        System.out.println("收到消息: " + message);
+        session.getBasicRemote().sendText("服务器已收到: " + message);
+    }
+
+    @javax.websocket.OnClose
+    public void onClose(javax.websocket.Session session) {
+        sessions.remove(session);
+        System.out.println("WebSocket连接已关闭: " + session.getId());
+    }
+
+    public static void broadcast(String message) {
+        for (javax.websocket.Session session : sessions) {
+            if (session.isOpen()) {
+                try {
+                    session.getBasicRemote().sendText(message);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+}