前端界面优化

src/main/resources/static/admin/bigScreen/index.html

@@ -118,7 +118,7 @@
                                 <thead>
                                 <tr>
                                     <th>${device.deviceState}</th>
-                                    <th>${device.deviceWorkState}</th>
+                                    <th>${device.deviceWorkState == null ? '' : device.deviceWorkState}</th>
                                 </tr>
                                 </thead>
                                 <tbody>