设置tomcat访问http时自动跳转到https

tomcat8
conf/server.xml
中原属于80端口的http修改为(tomcat默认是8080端口)

    <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="443" />
之后在conf/web.xml的最下面</web-app>前加上

    <login-config>
        <!-- Authorization setting for SSL -->
        <auth-method>CLIENT-CERT</auth-method>
        <realm-name>Client Cert Users-only Area</realm-name>
    </login-config>
    <security-constraint>
        <!-- Authorization setting for SSL -->
        <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>
之后重启tomcat即可