java服务端对接apns的几个sdk

1. JavaPNS
   https://code.google.com/archive/p/javapns/

2. Java APNS(notnoop)
   https://github.com/notnoop/java-apns

3. dbay-apns-for-java
   https://github.com/RamosLi/dbay-apns-for-java

4. Turo的pushy
   https://github.com/relayrides/pushy

5. golang版本
   https://github.com/sideshow/apns2