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web.xml

<welcome-file>redirect.jsp</welcome-file>
  </welcome-file-list>

redirect.jsp

<%--
Views should be stored under the WEB-INF folder so that
they are not accessible except through controller process.

This JSP is here to provide a redirect to the dispatcher
servlet but should be the only JSP outside of WEB-INF.
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<jsp:forward page="/energy-rent/html/index.html"/>

spring-mvc.xml

<mvc:resources mapping="/redirect.jsp" location="/" />