tomcat http를 https 로 redirect

web.xml 파일에 </web-app> 태그 마지막 부분에 추가

<!-- Automatisch alle requests redirecten naar https -->
<security-constraint>
      <web-resource-collection>
              <web-resource-name>Automatic SSL Forward</web-resource-name>
              <url-pattern>/*</url-pattern>
      </web-resource-collection>
      <user-data-constraint>
              <transport-guarantee>
                      CONFIDENTIAL
              </transport-guarantee>
      </user-data-constraint>
</security-constraint>

출처 : http://sysengineers.wordpress.com/2011/03/16/tomcat-automatic-redirect-https/