Avoid direct access to JSP in put JSP files into the web/src/class, or add the below code to your web.xml file:
<security-constraint>
<web-resource-collection>
<web-resource-name>Deny Direct Access</web-resource-name>
<description></description>
<url-pattern>*.jsp</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>Denied</role-name>
</auth-constraint>
</security-constraint>
<security-role>
<role-name>Denied</role-name>
</security-role>