As fvu explained, the contents inside are WEB-INFnot accessible via HTTP. The directory Webcontentin your directory structure looks like it was created for this specific purpose: storing CSS files, images, and JavaScript files.
CSS HTTP , Spring MVC
HTTP-. <mvc:resources> bean:
<mvc:resources mapping="/webcontent/**" location="/Webcontent/" />
CSS URL-:
http://localhost:8080/you-app-name/webcontent/...
<mvc:resources> Stackoverflow.