diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/ViewFacade.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/ViewFacade.java
index 3ec5328..3895b42 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/ViewFacade.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/ViewFacade.java
@@ -1752,7 +1752,7 @@ public class ViewFacade {
                     }
                 }
             }
-            return sb.toString().substring(0, sb.toString().length() - 1);
+            return sb.length() == 0 ? "" : sb.toString().substring(0, sb.toString().length() - 1);
         }
         return "";
     }