Option 1
Enable directory listing for specific URL pattern in web.xml
listImages org.apache.catalina.servlets.DefaultServlet debug 0 listings true 100 listImages /listImages/*
Option 2 NOTE: This will affects all folders in the webapp. It is best to enable directory listing only for an individual folder by writing own Servlet to handle the request.
1.Create a Context element in an XML file: Image.xml
2.Copy the Image.xml file to $CATALINA_HOME/conf/Catalina/localhost/.
3.Enable Directory listing in in Tomcat. Edit the default servlet in the {$CATALINA_HOME}/conf/web.xml file.
default org.apache.catalina.servlets.DefaultServlet debug 0 listings true 1
4.Change the param-value; to true for the param-name listing section.
listings true