When I was linking the Css file using the following tagline
<h:outputStylesheet library="css" name="style.css" target="body"/>
and I have the arranged directory structure as WebContent->resources->css->style.css
and I was getting result code on browser as <link type="text/css" rel="stylesheet" href="RES_NOT_FOUND" />
But when I have changed the file name to styles.css, it worked but I didn't get the reason that what was the problem with style.css.