leo*_*leo 5 java spring-mvc firebase spring-boot firebase-cloud-messaging
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,但我无法配置Java 中的服务器,用于向设备发送通知。我怎么能?
您可以通过以下方式实现这一目标:
第 1 步:在 firebase 上创建项目并生成服务器密钥。
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:
{
"notification":
{
"notificationType":"Test",
"title":"Title ",
"body":"Here is body"
},
"data":
{"notificationType":"Test",
"title":"Title ",
"body":"Here is body"
},
"to":"dlDQC5OPTbo:APA91bH8A6VuJ1Wl4TCOD1mKT0kcBr2bDZ-X8qdhpBfQNcXZWlFJuBMrQiKL3MGjdY6RbMNCw0NV1UmbU8eooe975vvRmqrvqJvliU54bsiT3pdvGIHypssf7r-4INt17db4KIqW0pbAkhSaIgl1eYjmzIOQxv2NwwwwXg"
}
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第 3 步:编写一个 Rest 调用者服务,它将通过以下 url 与 fcm 服务器通信:
https://fcm.googleapis.com/fcm/send
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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("\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);
}
}
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你只需要打电话,sendPushNotification(List<String> receiverKeys, String messageTitle, String message)
然后接收者就会收到推送消息
谢谢 :)
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