优化token

controller/src/main/java/com/koobietech/eas/config/CaptchaConfiguration.java

@@ -74,9 +74,7 @@ public class CaptchaConfiguration {
                 String filename = resource.getFilename();
                 imgMap.put(filename, string);
             }
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
+        } catch (Exception ignored) {}
         return imgMap;
     }
 }