JKS转PK8

1. JKS转P12

keytool -importkeystore -srckeystore temp.JKS -destkeystore tmp.p12 -srcstoretype JKS -deststoretype PKCS12

2. P12转pem

openssl pkcs12 -in tmp.p12 -nodes -out tmp.rsa.pem

3. pem转pk8

openssl pkcs8 -topk8 -outform DER -in tmp.rsa.pem -inform PEM -out my_private.pk8 -nocrypt

4. pem转x509.pem

cat tmp.rsa.pem

复制-----BEGIN CERTIFICATE-----到

-----END CERTIFICATE-----的部分，粘贴到temp.x509.pem 即可