Firebase 云消息传递 REST API Spring

Firebase cloud messaging rest API spring(Firebase 云消息传递 REST API Spring)

问题描述

我必须在 Spring Java 中为多层架构创建一个 Rest API，其中需要为 Firebase 云消息传递 (FCM) 构建 DAO、控制器、服务管理器以将推送通知消息发送到 android 应用程序，但我可以无法在 Java 中配置服务器以向设备发送通知.我怎么可能?

I have to make a Rest API in Spring Java for a multi tier arch in which DAO, Controller, Service manager needs to be build for a Firebase Cloud Messaging (FCM) to send push notifications messages to android application, but I can not able configure a server in Java to send notifications to devices. How could I?

推荐答案

以下是实现此目的的方法:

Here is the way that you can achieve this:

第 1 步:在 firebase 上创建项目并生成服务器密钥.

Step 1: Create project on firebase and generate server key.

第 2 步:为 fcm 服务器生成一个 json 对象.这里的消息可能包含数据对象和通知对象.它还必须具有接收器 fcm id.示例 json 是这样的:

Step 2: Generate a json object for fcm server. Here message may contains data object and notification object. It must also have receiver fcm id. Sample json is like:

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

第 3 步:编写一个 Rest 调用者服务，它将通过以下 url 与 fcm 服务器进行通信:

Step 3 : Write a Rest caller service that will communicate with fcm server by following url:

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

这是示例工作代码:

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("
Calling fcm Server >>>>>>>");
            String response = callToFcmServer(msg, key);
            System.out.println("Got response from fcm Server : " + response + "

");
        });

    }

    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);
    }
}

你只需要调用 sendPushNotification(ListreceiverKeys, String messageTitle, String message) 然后接收者就会收到推送消息

You have to just call sendPushNotification(List<String> receiverKeys, String messageTitle, String message) then receiver will get push message

谢谢:)

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