A connector entry like mentioned here might help, assuming the Tomcat/Java version that you are using does support TLS 1.2
Enable SSL in Tomcat for CA Service Desk Manager u - CA Knowledge
<Connector SSLEnabled="true"
ciphers="TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_ CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_C BC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CB C_SHA256,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_CBC _SHA,TLS_RSA_WITH_AES_256_CBC_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WI TH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA"
clientAuth="false" keystoreFile="C:\keystore\sdmcert.pfx"
keystorePass="YOURPASSWORD" keystoreType="PKCS12"
maxThreads="150" port="8443" protocol="HTTP/1.1" scheme="https" secure="true" sslEnabledProtocols="TLSv1,TLSv1.1,TLSv1.2" sslProtocol="TLS"/>
_R