1. Goto Tomcat installation folder > conf 
2. Create a folder ‘ssl’ and add 3 certificate files to the folder
   1. private.key : certificateKeyFile (Private Key)
   2. certificate.cer : certificateFile (Certificate)
   3. chain.cer : certificateChainFile(Root/Intermediate)
3. Take a backup of “server.xml” file before editing
4. Add the following snippet in the “server.xml” file

<Connector port="443" protocol="org.apache.coyote.http11.Http11AprProtocol" maxThreads="150" SSLEnabled="true" >
  <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
  <SSLHostConfig>
    <Certificate certificateKeyFile="conf/ssl/private.key"
                 certificateFile="conf/ssl/certificate.cer"
                 certificateChainFile="conf/ssl/chain.cer"
                 type="RSA" />
   </SSLHostConfig>
</Connector>

5. Add a redirection rule in “server.xml” from HTTP to HTTPs as:

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

6. This configuration acts if you have configured a CONFIDENTIAL transport guarantee for a web application inside that servlet container.

Edit “web.xml” file to add the following snippet

<security-constraint>
  <web-resource-collection>
    <web-resource-name>Secured</web-resource-name>
    <url-pattern>/*</url-pattern>
  </web-resource-collection>
  <user-data-constraint>
    <transport-guarantee>CONFIDENTIAL</transport-guarantee>
  </user-data-constraint>
</security-constraint>

Then, Tomcat will redirect any matching url-pattern to the configured port in order to use HTTPS as a guarantor of confidentiality in transport.

So, if you want to redirect a specific URL, you have to complement the connector’s configuration with specific application configuration.

7. Start “run” and Open Services by typing “services.msc”

8. Find “Apache Tomcat” and restart the server.