diff --git a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletContextResource.java b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletContextResource.java
index 599c9e3e54e..86f5794b28d 100644
--- a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletContextResource.java
+++ b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletContextResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -107,6 +107,28 @@ public class PortletContextResource extends AbstractFileResolvingResource implem
 		}
 	}
 
+	/**
+	 * This implementation delegates to <code>PortletContext.getResourceAsStream</code>,
+	 * which returns <code>null</code> in case of a non-readable resource (e.g. a directory).
+	 * @see javax.portlet.PortletContext#getResourceAsStream(String)
+	 */
+	@Override
+	public boolean isReadable() {
+		InputStream is = this.portletContext.getResourceAsStream(this.path);
+		if (is != null) {
+			try {
+				is.close();
+			}
+			catch (IOException ex) {
+				// ignore
+			}
+			return true;
+		}
+		else {
+			return false;
+		}
+	}
+
 	/**
 	 * This implementation delegates to <code>PortletContext.getResourceAsStream</code>,
 	 * but throws a FileNotFoundException if not found.
diff --git a/org.springframework.web/src/main/java/org/springframework/web/context/support/ServletContextResource.java b/org.springframework.web/src/main/java/org/springframework/web/context/support/ServletContextResource.java
index 99a028b2dc2..af73e49a436 100644
--- a/org.springframework.web/src/main/java/org/springframework/web/context/support/ServletContextResource.java
+++ b/org.springframework.web/src/main/java/org/springframework/web/context/support/ServletContextResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -107,6 +107,28 @@ public class ServletContextResource extends AbstractFileResolvingResource implem
 		}
 	}
 
+	/**
+	 * This implementation delegates to <code>ServletContext.getResourceAsStream</code>,
+	 * which returns <code>null</code> in case of a non-readable resource (e.g. a directory).
+	 * @see javax.servlet.ServletContext#getResourceAsStream(String)
+	 */
+	@Override
+	public boolean isReadable() {
+		InputStream is = this.servletContext.getResourceAsStream(this.path);
+		if (is != null) {
+			try {
+				is.close();
+			}
+			catch (IOException ex) {
+				// ignore
+			}
+			return true;
+		}
+		else {
+			return false;
+		}
+	}
+
 	/**
 	 * This implementation delegates to <code>ServletContext.getResourceAsStream</code>,
 	 * but throws a FileNotFoundException if no resource found.