Send Firebase (FCM) Notification to android devices using Java. JSP Example ( Java API )
It sends Firebase Notification to android mobile. You need to pull FCMNotif android project for this, from my repository. You have to place firebase API key in FirebaseConfig class and username & password in DbConnection class. Then you can register device using android app(FCMNotif) first and then you can send notification to android device using firebase.jsp page.
You need to create a table in fcm database as
CREATE TABLE devices (
id int(11) NOT NULL,
email varchar(100) NOT NULL,
token text NOT NULL
) ;