Index: src/main/java/org/mortbay/jetty/plugin/JettyWebAppContext.java
===================================================================
--- src/main/java/org/mortbay/jetty/plugin/JettyWebAppContext.java	(revision 5898)
+++ src/main/java/org/mortbay/jetty/plugin/JettyWebAppContext.java	(revision )
@@ -16,10 +16,16 @@
 package org.mortbay.jetty.plugin;
 
 import java.io.File;
-import java.util.List;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.*;
 
 import org.eclipse.jetty.annotations.AnnotationConfiguration;
 import org.eclipse.jetty.plus.webapp.EnvConfiguration;
+import org.eclipse.jetty.util.URIUtil;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.resource.FileResource;
 import org.eclipse.jetty.util.resource.Resource;
 import org.eclipse.jetty.webapp.Configuration;
 import org.eclipse.jetty.webapp.FragmentConfiguration;
@@ -40,6 +46,9 @@
  */
 public class JettyWebAppContext extends WebAppContext
 {
+    private static final String WEB_INF_CLASSES_PREFIX = "/WEB-INF/classes";
+    private static final String WEB_INF_LIB_PREFIX = "/WEB-INF/lib";
+
     private List<File> classpathFiles;
     private String jettyEnvXml;
     private MavenWebInfConfiguration webInfConfig = new MavenWebInfConfiguration();
@@ -54,8 +63,9 @@
     private Configuration[] configs;
     private List<Resource> overlays;
     private boolean unpackOverlays;
+    private File classesDir;
+    private Map<String, File> classpathJarFiles = new TreeMap<String, File>();
-    
+
-
     public JettyWebAppContext ()
     throws Exception
     {
@@ -103,11 +113,31 @@
         return this.jettyEnvXml;
     }
 
+    public File getClassesDir()
+    {
+        return classesDir;
+    }
 
+    public void setClassesDir(File classesDir)
+    {
+        this.classesDir = classesDir;
+    }
+
+
     public void doStart () throws Exception
     {
         setConfigurations(configs);
-        
+
+        // Initialize map containing all jars in /WEB-INF/lib
+        classpathJarFiles.clear();
+        for (File file : classpathFiles)
+        {
+            // Return all jar files from class path
+            String fileName = file.getName();
+            if (fileName.endsWith(".jar"))
+                classpathJarFiles.put(fileName, file);
+        }
+
         if (this.jettyEnvXml != null)
             envConfig.setJettyEnvXml(new File(this.jettyEnvXml).toURL());
         setShutdown(false);
@@ -121,4 +151,78 @@
         Thread.currentThread().sleep(500L);
         super.doStop();
     }
+
+    @Override
+    public Resource getResource(String uriInContext) throws MalformedURLException
+    {
+        Resource resource = null;
+        // Try to get regular resource
+        resource = super.getResource(uriInContext);
+
+        // If no regular resource exists check for access to /WEB-INF/lib or /WEB-INF/classes
+        if ((resource == null || !resource.exists()) && uriInContext != null && classesDir != null)
+        {
+            String uri = URIUtil.canonicalPath(uriInContext);
+
+            try {
+                // Replace /WEB-INF/classes with real classes directory
+                if (uri.startsWith(WEB_INF_CLASSES_PREFIX))
+                {
+                    String classesPath = classesDir.getPath();
+                    String newPath = uri.replace(WEB_INF_CLASSES_PREFIX, classesPath);
+                    return Resource.newResource(newPath);
-}
+                }
+                // Return the real jar file for all accesses to /WEB-INF/lib/*.jar
+                else if (uri.startsWith(WEB_INF_LIB_PREFIX))
+                {
+                    String jarName = uri.replace(WEB_INF_LIB_PREFIX, "");
+                    if (jarName.startsWith("/") || jarName.startsWith("\\"))
+                        jarName = jarName.substring(1);
+                    if (jarName.isEmpty())
+                        return null;
+                    File jarFile = classpathJarFiles.get(jarName);
+                    return Resource.newResource(jarFile.getPath());
+                }
+            }
+            catch (MalformedURLException e)
+            {
+                throw e;
+            }
+            catch (IOException e)
+            {
+                Log.ignore(e);
+            }
+        }
+        return resource;
+    }
+
+    @Override
+    public Set<String> getResourcePaths(String path)
+    {
+        // Try to get regular resource paths
+        Set<String> paths = super.getResourcePaths(path);
+
+        // If no paths are returned check for virtual paths /WEB-INF/classes and /WEB-INF/lib
+        if (paths.isEmpty() && path != null)
+        {
+            path = URIUtil.canonicalPath(path);
+            if (path.startsWith(WEB_INF_LIB_PREFIX))
+            {
+                paths = new TreeSet<String>();
+                for (String fileName : classpathJarFiles.keySet())
+                {
+                    // Return all jar files from class path
+                    paths.add(WEB_INF_LIB_PREFIX + "/" + fileName);
+                }
+            }
+            else if (path.startsWith(WEB_INF_CLASSES_PREFIX))
+            {
+                String classesPath = classesDir.getPath();
+                String newPath = path.replace(WEB_INF_CLASSES_PREFIX, classesPath);
+                super.getResourcePaths(newPath);
+            }
+        }
+        return paths;
+    }
+
+}
Index: src/main/java/org/mortbay/jetty/plugin/JettyRunMojo.java
===================================================================
--- src/main/java/org/mortbay/jetty/plugin/JettyRunMojo.java	(revision 6011)
+++ src/main/java/org/mortbay/jetty/plugin/JettyRunMojo.java	(revision )
@@ -529,7 +529,10 @@
             classPathFiles.add(testClassesDirectory);
         
         if (getClassesDirectory() != null)
+        {
+            webAppConfig.setClassesDir(getClassesDirectory());
             classPathFiles.add(getClassesDirectory());
+        }
         
         //now add all of the dependencies
         classPathFiles.addAll(getDependencyFiles());