I found several ways to write in properties files.

server.ssl.key-store-type=PKCS12
server.ssl.key-store=
server.ssl.key-store-password=

server.ssl.certificate=
server.ssl.certificate-private-key=

And I've also read the official document.

spring.ssl.bundle.jks.mybundle.truststore.location=classpath:server.p12
spring.ssl.bundle.jks.mybundle.truststore.password=secret

The contents are different, but the results are the same.

I'd like to read a document on the first method, does anyone know