keytool -genkey -alias tomcat -keyalg RSA -keystore <filename>
2. key in the parameter
3. configuring tomcat
<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
maxThreads="150" scheme="https" secure="true"
keystoreFile="<filename>"
keystorePass="<password>"
clientAuth="false" sslProtocol="TLS" />