diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/jsp/JspNameMangler.java b/src/main/org/apache/tools/ant/taskdefs/optional/jsp/JspNameMangler.java
index 1de57635d..6aaae5c25 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/jsp/JspNameMangler.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/jsp/JspNameMangler.java
@@ -18,6 +18,8 @@
 package org.apache.tools.ant.taskdefs.optional.jsp;
 import java.io.File;
 
+import org.apache.tools.ant.util.StringUtils;
+
 /**
  * This is a class derived from the Jasper code
  * (org.apache.jasper.compiler.CommandLineCompiler) to map from a JSP filename
@@ -109,14 +111,7 @@ public class JspNameMangler implements JspMangler {
      * @return file without any jsp extension
      */
     private String stripExtension(File jspFile) {
-        String className;
-        String filename = jspFile.getName();
-        if (filename.endsWith(".jsp")) {
-            className = filename.substring(0, filename.length() - ".jsp".length());
-        } else {
-            className = filename;
-        }
-        return className;
+        return StringUtils.removeSuffix(jspFile.getName(), ".jsp");
     }
 
 
diff --git a/src/main/org/apache/tools/ant/util/StringUtils.java b/src/main/org/apache/tools/ant/util/StringUtils.java
index fc867355a..74c8adfc9 100644
--- a/src/main/org/apache/tools/ant/util/StringUtils.java
+++ b/src/main/org/apache/tools/ant/util/StringUtils.java
@@ -241,4 +241,19 @@ public final class StringUtils {
         }
         return factor * Long.parseLong(humanSize);
     }
+
+    /**
+     * Removes the suffix from a given string, if the string contains 
+     * that suffix.
+     * @param string String for check
+     * @param suffix Suffix to remove
+     * @return the <i>string</i> with the <i>suffix</i>
+     */
+    public static String removeSuffix(String string, String suffix) {
+        if (string.endsWith(suffix)) {
+            return string.substring(0, string.length() - suffix.length());
+        } else {
+            return string;
+        }
+    }
 }