diff --git a/doc/若依环境使用手册.docx b/doc/若依环境使用手册.docx
index 3a14f84b..fa5b62d7 100644
Binary files a/doc/若依环境使用手册.docx and b/doc/若依环境使用手册.docx differ
diff --git a/src/main/java/com/ruoyi/common/utils/StringUtils.java b/src/main/java/com/ruoyi/common/utils/StringUtils.java
index b4eb59a8..e33a72c4 100644
--- a/src/main/java/com/ruoyi/common/utils/StringUtils.java
+++ b/src/main/java/com/ruoyi/common/utils/StringUtils.java
@@ -372,6 +372,10 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils
         {
             return null;
         }
+        if (s.indexOf(SEPARATOR) == -1)
+        {
+            return s;
+        }
         s = s.toLowerCase();
         StringBuilder sb = new StringBuilder(s.length());
         boolean upperCase = false;
@@ -401,4 +405,4 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils
     {
         return (T) obj;
     }
-}
\ No newline at end of file
+}