diff --git a/apps/showcase/src/main/java/org/apache/struts2/showcase/source/ViewSourceAction.java b/apps/showcase/src/main/java/org/apache/struts2/showcase/source/ViewSourceAction.java
index ea546c9c6..6bd91e2f6 100644
--- a/apps/showcase/src/main/java/org/apache/struts2/showcase/source/ViewSourceAction.java
+++ b/apps/showcase/src/main/java/org/apache/struts2/showcase/source/ViewSourceAction.java
@@ -57,7 +57,7 @@ public class ViewSourceAction extends ActionSupport implements ServletContextAwa
 
     public String execute() throws MalformedURLException, IOException {
 
-        if (page != null) {
+        if (page != null && page.trim().length() > 0) {
 
             InputStream in = ClassLoaderUtil.getResourceAsStream(page.substring(page.indexOf("//")+1), getClass());
             page = page.replace("//", "/");
@@ -72,7 +72,7 @@ public class ViewSourceAction extends ActionSupport implements ServletContextAwa
             pageLines = read(in, -1);
         }
 
-        if (className != null) {
+        if (className != null && className.trim().length() > 0) {
             className = "/"+className.replace('.', '/') + ".java";
             InputStream in = getClass().getResourceAsStream(className);
             if (in == null) {
@@ -81,7 +81,7 @@ public class ViewSourceAction extends ActionSupport implements ServletContextAwa
             classLines = read(in, -1);
         }
 
-        if (config != null) {
+        if (config != null && config.trim().length() > 0) {
             int pos = config.lastIndexOf(':');
             configLine = Integer.parseInt(config.substring(pos+1));
             config = config.substring(0, pos).replace("//", "/");