How to convert PEM to JKS
First convert to PCKS12
openssl pkcs12 -export -in cert.pem -inkey key.pem -out cert.p12 -name "cert"Import PCKS12 to JKS
keytool -importkeystore -srckeystore cert.p12 -srcstoretype pkcs12 -destkeystore cert.jksFirst convert to PCKS12
openssl pkcs12 -export -in cert.pem -inkey key.pem -out cert.p12 -name "cert"Import PCKS12 to JKS
keytool -importkeystore -srckeystore cert.p12 -srcstoretype pkcs12 -destkeystore cert.jks