Java APNS (com.notnoop.apns, v0.2.3) to send Push Notifications to my iOS app

传送门：《What's the correct format for Java APNS certificate?》

TLDR：

1. Export the private key from the Keychain and name it aps_private-key.p12.
2. Convert the key with the following command

   openssl pkcs12 -nocerts -out aps_private-key.pem -in aps_private-key.p12

   make sure to enter a PEM pass phrase of at least 4 characters.

3. Download the certificate for your app from https://developer.apple.com/account/ios/identifiers/bundle/bundleList.action. The downloaded file should be called something like aps_development.cer.
4. Convert the certificate with the following command

   openssl x509 -in aps_development.cer -inform der -out aps_development.pem

5. Generate the credentials using

   openssl pkcs12 -export -in aps_development.pem -out aps_dev_credentials.p12 -inkey aps_private-key.pem

6. And I'm ready to use the credentials generated in step 5 (aps_dev_credentials.p12).

final InputStream certificate = Thread.currentThread().getContextClassLoader()
        .getResourceAsStream("aps_dev_credentials.p12");
final char[] passwd = {'1','2','3','4'};
final ApnsService apnsService = com.notnoop.apns.APNS.newService()
        .withCert(certificate, new String(passwd))
        .withSandboxDestination().build();
apnsService.testConnection();