购买阿里云免费https证书，配置tomcat实现https加密访问

<Connector port="80" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="443" />
<Connector port="443" protocol="org.apache.coyote.http11.Http11Protocol" SSLEnabled="true"
               maxThreads="150" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" 
            keystoreFile="cert/xxx.jks" keystorePass="xxxxx"/>

<Connector port="8009" protocol="AJP/1.3" redirectPort="443" />

 1     <welcome-file-list>
 2         <welcome-file>index.html</welcome-file>
 3         <welcome-file>index.htm</welcome-file>
 4         <welcome-file>index.jsp</welcome-file>
 5     </welcome-file-list>
 6 
 7 <login-config>
 8  <!-- Authorization setting for SSL -->
 9  <auth-method>CLIENT-CERT</auth-method>
10  <realm-name>Client Cert Users-only Area</realm-name>
11  </login-config>
12 
13  <security-constraint>
14 <!-- Authorization setting for SSL -->
15  <web-resource-collection >
16  <web-resource-name >SSL</web-resource-name>
17  <url-pattern>/*</url-pattern>
18  </web-resource-collection>
19  <user-data-constraint>
20  <transport-guarantee>CONFIDENTIAL</transport-guarantee>
21  </user-data-constraint>
22  </security-constraint>