diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/result/HighScoreResult.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/result/HighScoreResult.java
index 4038c07..fa5d5ae 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/result/HighScoreResult.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/result/HighScoreResult.java
@@ -51,7 +51,9 @@ public class HighScoreResult {
                 stringBuilder.append(map.get("name")).append(", ");
             }
         }
-        stringBuilder.setLength(stringBuilder.length() - 2);
+        if(stringBuilder.length()>=2){
+            stringBuilder.setLength(stringBuilder.length() - 2);
+        }
         return stringBuilder.toString();
     }
 
@@ -64,7 +66,9 @@ public class HighScoreResult {
             java.util.Map<String, String> map = (java.util.Map<String, String>) highRisk.get(i1);
             stringBuilder.append(map.get("name")).append(", ");
         }
-        stringBuilder.setLength(stringBuilder.length() - 2);
+        if(stringBuilder.length()>=2) {
+            stringBuilder.setLength(stringBuilder.length() - 2);
+        }
         return stringBuilder.toString();
     }
 }