diff --git a/src/main/java/com/taover/util/UtilString.java b/src/main/java/com/taover/util/UtilString.java
index 7e571a2..5af2a8f 100644
--- a/src/main/java/com/taover/util/UtilString.java
+++ b/src/main/java/com/taover/util/UtilString.java
@@ -45,7 +45,7 @@ public class UtilString {
 		}
 		
 		Pattern pattern = Pattern.compile("\\S");
-		int endIndex = source.length();
+		int endIndex = source.length()-1;
 		for(int i=source.length()-1; i>=0; --i){
 			char data  = source.charAt(i);
 			if(pattern.matcher(data+"").find()){
--
libgit2 0.21.2