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klp-oa/scaner/src/main/java/org/example/HttpRequestUtil.java

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+package org.example;
+
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class HttpRequestUtil {
+    /**
+     * 向指定URL发送POST请求，发送JSON数据
+     * @param urlStr 目标接口地址
+     * @param jsonData 发送的JSON字符串
+     * @return 响应内容
+     * @throws Exception 网络异常
+     */
+    public static String postJson(String urlStr, String jsonData) throws Exception {
+        URL url = new URL(urlStr);
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod("POST");
+        conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
+        conn.setDoOutput(true);
+        conn.setDoInput(true);
+        try (OutputStream os = conn.getOutputStream()) {
+            os.write(jsonData.getBytes("UTF-8"));
+        }
+        int code = conn.getResponseCode();
+        if (code == 200) {
+            try (java.io.InputStream is = conn.getInputStream()) {
+                java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
+                byte[] buffer = new byte[1024];
+                int len;
+                while ((len = is.read(buffer)) != -1) {
+                    baos.write(buffer, 0, len);
+                }
+                return new String(baos.toByteArray(), "UTF-8");
+            }
+        } else {
+            throw new RuntimeException("HTTP请求失败，状态码: " + code);
+        }
+    }
+
+    /**
+     * 向指定URL发送GET请求
+     * @param urlStr 目标接口地址
+     * @return 响应内容
+     * @throws Exception 网络异常
+     */
+    public static String get(String urlStr) throws Exception {
+        URL url = new URL(urlStr);
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod("GET");
+        conn.setRequestProperty("Accept", "application/json");
+        conn.setDoInput(true);
+        int code = conn.getResponseCode();
+        if (code == 200) {
+            try (java.io.InputStream is = conn.getInputStream()) {
+                java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
+                byte[] buffer = new byte[1024];
+                int len;
+                while ((len = is.read(buffer)) != -1) {
+                    baos.write(buffer, 0, len);
+                }
+                return new String(baos.toByteArray(), "UTF-8");
+            }
+        } else {
+            throw new RuntimeException("HTTP GET请求失败，状态码: " + code);
+        }
+    }
+} 

klp-oa/scaner/src/main/java/org/example/WsServer.java

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+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;
+
+@ServerEndpoint("/ws")
+public class WsServer {
+    private static final Set<Session> sessions = new CopyOnWriteArraySet<>();
+
+    @OnOpen
+    public void onOpen(Session session) {
+        sessions.add(session);
+        System.out.println("WebSocket连接已建立: " + session.getId());
+        // 推送所有扫码枪列表给前端（使用修改后的方法名）
+//        String deviceListJson = Main.getAllDevicesJson();
+//        try {
+//            System.out.println("发送设备列表到前端: " + deviceListJson);
+//            session.getBasicRemote().sendText(deviceListJson);
+//        } catch (IOException e) {
+//            e.printStackTrace();
+//        }
+    }
+
+    @OnMessage
+    public void onMessage(String message, Session session) throws IOException {
+        System.out.println("收到消息: " + message);
+        // 可以根据前端需求，在这里处理命令（比如刷新设备列表）
+        if ("refreshDevices".equals(message)) {
+//            String deviceListJson = Main.getAllDevicesJson();
+//            session.getBasicRemote().sendText(deviceListJson);
+        } else {
+            session.getBasicRemote().sendText("服务器已收到: " + message);
+        }
+    }
+
+    @OnClose
+    public void onClose(Session session) {
+        sessions.remove(session);
+        System.out.println("WebSocket连接已关闭: " + session.getId());
+    }
+
+    public static void broadcast(String message) {
+        for (Session session : sessions) {
+            if (session.isOpen()) {
+                try {
+                    session.getBasicRemote().sendText(message);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+}