diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/MapDataUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/MapDataUtil.java
index d750df45d..327e54fd1 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/MapDataUtil.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/MapDataUtil.java
@@ -33,11 +33,15 @@ public class MapDataUtil
             else if (valueObj instanceof String[])
             {
                 String[] values = (String[]) valueObj;
+                value = "";
                 for (int i = 0; i < values.length; i++)
                 {
-                    value = values[i] + ",";
+                    value += values[i] + ",";
+                }
+                if (value.length() > 0)
+                {
+                    value = value.substring(0, value.length() - 1);
                 }
-                value = value.substring(0, value.length() - 1);
             }
             else
             {