How do I list / export private keys from a keystore?

For android development, to convert keystore created in eclipse ADT into public key and private key used in SignApk.jar:

export private key:

keytool.exe -importkeystore -srcstoretype JKS -srckeystore my-release-key.keystore -deststoretype PKCS12 -destkeystore keys.pk12.der
openssl.exe pkcs12 -in keys.pk12.der -nodes -out private.rsa.pem

edit private.rsa.pem and leave "-----BEGIN PRIVATE KEY-----" to "-----END PRIVATE KEY-----" paragraph, then:

openssl.exe base64 -d -in private.rsa.pem -out private.rsa.der

export public key:

keytool.exe -exportcert -keystore my-release-key.keystore -storepass <KEYSTORE_PASSWORD> -alias alias_name -file public.x509.der

sign apk:

java -jar SignApk.jar public.x509.der private.rsa.der input.apk output.apk