从sslforfree网站获取到的三个文件：ca_bundle.crt，certificate.crt，private.key，怎么将这三个文件合成pfx格式的证书？
openssl pkcs12 -export -out D:\Downloads\sslforfree\certificate.pfx -inkey D:\Downloads\sslforfree\private.key -in D:\Downloads\sslforfree\certificate.crt -certfile D:\Downloads\sslforfree\ca_bundle.crt
openssl pkcs12 -export -out D:\Downloads\sslforfree\certificate.pfx -inkey D:\Downloads\sslforfree\private.key -in D:\Downloads\sslforfree\certificate.crt -certfile D:\Downloads\sslforfree\ca_bundle.crt