I found Aliyun"s free ssl certificate from the Internet to test the https URL, but according to the online tutorials, I can"t access it with https all the time. What"s the reason for not adjusting it? Still, you can only use http to access the URL. Find the reason
URL
server.xml key values are as follows:

    <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="443" />

this is configured for https, but it is not successful

<Connector port="443"
    protocol="org.apache.coyote.http11.Http11Protocol"
    SSLEnabled="true"
    scheme="https"
    secure="true"
    keystoreFile="cert/20165323****.pfx"
    keystoreType="PKCS12"
    keystorePass="bacdxx"
    clientAuth="false"
    SSLProtocol="TLSv1+TLSv1.1+TLSv1.2"
    ciphers="TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA256"/>

there is no problem with the path here. The cert folder is under the conf directory.
other configurations:

      <Host name="xuyunrui.cn"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
        <Context docBase="SteeringAI" reloadable="true" path=""/>