web.xml中配置http訪問轉向https

 <login-config>
  <auth-method>CLIENT-CERT</auth-method> 
  <realm-name>Client Cert Users-only Area</realm-name> 
 </login-config> 
 <security-constraint> 
  <web-resource-collection > 
   <web-resource-name >SSL</web-resource-name> 
   <url-pattern>/*</url-pattern> 
  </web-resource-collection> 
  <user-data-constraint> 
   <transport-guarantee>CONFIDENTIAL</transport-guarantee> 
  </user-data-constraint> 
 </security-constraint>