Having trouble accessing CSS images in JSF

Issue Details : I am currently facing a problem with setting menu background images in my JSF application using CSS properties.

The file structure is as follows

  • This is the CSS snippet

Style.css

  #menu 
  {
   height:35px;
   width:950px;
   background:url(images/default.gif);
   /*background:url(#{resource['images:default.gif']}); 
   background:url(#{resource['images/default.gif']});
   */
  }

The CSS file is located under /resources/css directory, and it is imported in Facelets page using

<h:head>
<h:outputStylesheet library="css" name="style.css"></h:outputStylesheet>
</h:head>

No issues with importing the CSS file

Problem Statement

  • FacesServlet is mapped to *.xhtml:

     <servlet-mapping>
     <servlet-name>Faces Servlet</servlet-name>
     <url-pattern>*.xhtml</url-pattern>
     </servlet-mapping>
    

    Upon running the home page, the menu images specified in the css are not loading

  • Removing the FacesServlet mapping on *.xhtml resolves the image loading issue

Attempts Made

Tried various methods in the css file to load an image

  1. background:url(images/default.gif);
  2. background:url(#{resource['images:default.gif']});
  3. background:url(#{resource['images/default.gif']});

However, a solution has not been found yet.

Updated Solution

  • Added Resource handler in faces-config.xml

    <application><resource-handler>org.omnifaces.resourcehandler.UnmappedResourceHandler</resource-handler>
    </application>

  • FacesServlet Configuration in web.xml

    <servlet-mapping>
      <servlet-name>Faces Servlet</servlet-name>
      <url-pattern>*.xhtml</url-pattern>
      <url-pattern>/javax.faces.resource/*</url-pattern>
    </servlet-mapping>
    
  • Place images under /resources/images directory

  • Format for accessing images in css file

    #menu
    {background: url(images/bg.png)
    }

Answer №1

A solution to your problem can be found using the UnmappedResourceHandler created by OmniFaces.

With this resource handler, you will be able to generate unmapped URLs such as /javax.faces.resource/css/style.css. This eliminates the need for developers to use the #{resource} EL expression to correctly reference relative URLs in CSS files.

If you want additional information, check out a similar question and answer on this topic here: Prevent suffix from being added to resources when page loads

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