Firebase云消息传递RESTAPI spring

Question

我必须在SpringJava中为多层架构制作一个RESTAPI，其中需要为Firebase云消息传递（FCM）构建DAO、控制器和服务管理器，以向android应用程序发送推送通知消息，但我无法在Java中配置服务器以向设备发送通知。我怎么能？

Answer 1

以下是实现这一目标的方法：

步骤1：在firebase上创建项目并生成服务器密钥。

步骤2：为fcm服务器生成一个json对象。这里消息可以包含数据对象和通知对象。它还必须有接收器fcm ID。示例json是这样的：

{
    "notification":
        {
            "notificationType":"Test",
        "title":"Title ",
        "body":"Here is body"
        },
    "data":
        {"notificationType":"Test",
        "title":"Title ",
        "body":"Here is body"
        },
        "to":"dlDQC5OPTbo:APA91bH8A6VuJ1Wl4TCOD1mKT0kcBr2bDZ-X8qdhpBfQNcXZWlFJuBMrQiKL3MGjdY6RbMNCw0NV1UmbU8eooe975vvRmqrvqJvliU54bsiT3pdvGIHypssf7r-4INt17db4KIqW0pbAkhSaIgl1eYjmzIOQxv2NwwwwXg"
}

步骤3：编写一个Rest调用方服务，该服务将通过以下url与fcm服务器通信：

https://fcm.googleapis.com/fcm/send

下面是示例工作代码：

public class PushNotificationServiceImpl {
    private final String FIREBASE_API_URL = "https://fcm.googleapis.com/fcm/send";
    private final String FIREBASE_SERVER_KEY = "YOUR_SERVER_KEY";


    public void sendPushNotification(List<String> keys, String messageTitle, String message) {


        JSONObject msg = new JSONObject();

        msg.put("title", messageTitle);
        msg.put("body", message);
        msg.put("notificationType", "Test");

        keys.forEach(key -> {
            System.out.println("\nCalling fcm Server >>>>>>>");
            String response = callToFcmServer(msg, key);
            System.out.println("Got response from fcm Server : " + response + "\n\n");
        });

    }

    private String callToFcmServer(JSONObject message, String receiverFcmKey) {
        RestTemplate restTemplate = new RestTemplate();
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.set("Authorization", "key=" + FIREBASE_SERVER_KEY);
        httpHeaders.set("Content-Type", "application/json");

        JSONObject json = new JSONObject();

        json.put("data", message);
        json.put("notification", message);
        json.put("to", receiverFcmKey);

        System.out.println("Sending :" + json.toString());

        HttpEntity<String> httpEntity = new HttpEntity<>(json.toString(), httpHeaders);
        return restTemplate.postForObject(FIREBASE_API_URL, httpEntity, String.class);
    }
}

您只需调用sendPushNotification（列表

谢谢：）