특정 확장자 접근 비허용

WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ... >
	<servlet>
		<servlet-name>Servlet that filter forbidden</servlet-name>
		<servlet-class>my.package.ForbiddenServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>Servlet that filter forbidden</servlet-name>
		<url-pattern>*.html</url-pattern>
	</servlet-mapping>
</web-app>

my.package.ForbiddenServlet.java

public class ForbiddenServlet extends HttpServlet {
	public ForbiddenServlet() {
	
	}
	
	public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
//		super.service(req, res);
		res.sendError(HttpServletResponse.SC_FORBIDDEN);
	}
}