java - Is there a better approach to making a Picture Gallery using Primefaces? -

i trying create little "media library" fun on own , im struggling first simple task creating simple gallery.

i using primefaces on apache tomcat server. in /wptwebapps folder have project , "file structure":

├───files │   └───root │       └───usr1 │           └───media │               ├───music │               ├───pictures │               └───video 

what trying do, is, dynamically possible, read each picture in /pictures , display them using primefaces galleria.

galleria on bilder.xhtml

    <p:galleria value="#{galleriaview.images}" var="image" panelwidth="500" panelheight="313" showcaption="true">                     <p:graphicimage name="../files/root/usr1/media/pictures/#{image}" alt="image description #{image}" title="#{image}" />                 </p:galleria> 

galleriaview.java

package com.deegee.media.gallery;  import java.util.arraylist; import java.util.list;  import javax.annotation.postconstruct; import javax.faces.bean.managedbean; import javax.faces.context.facescontext;  @managedbean(name = "galleriaview") public class galleriaview {      private list<string> images;     private list<string> dir;       @postconstruct     public void init() {         images = new arraylist<string>();         (int = 1; <= 12; i++) {             images.add("usr1_" + + ".jpg");             dir.add(facescontext.getcurrentinstance().getexternalcontext().getrealpath("../files/root/usr1/media/pictures/")                     + images.get(i));         }     }      public list<string> getimages() {         return images;     }      public list<string> getdir() {         return dir;     }  } 

the problem lies reading pictures file structure. extremely lazy im trying find easiest, simple solution (pathetic, know), i.e. want prevent using database or fancy ftp calls or stuff that.

so, can here? how can read file structure? or have resort databases etc.?