在Java Spring中獲取資源URL路徑

Question

試圖獲取我在資源文件夾中的JSON文件的路徑，但無法通過getResource().getPath() 。 我想以盡可能可靠的方式獲取此URL。

public static void initializeFirebase() {
        try {
            URL url = getResource("google-services.json");
            System.out.println(url.getPath());
            FirebaseOptions options = new FirebaseOptions
                    .Builder()
                    .setServiceAccount(new FileInputStream(url.getPath()))
                    .setDatabaseUrl("https://XXXXX.firebaseio.com/")
                    .build();
            FirebaseApp.initializeApp(options);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

上面的函數在拋出錯誤之前會打印： /Users/username/Documents/Spring_Project/springbackend/build/resources/main/google-services.json ：

Exception in thread "main" java.lang.RuntimeException: Failed to read service account
    at com.google.firebase.FirebaseOptions$Builder.setServiceAccount(FirebaseOptions.java:82)
    at live.cibc.labs.springbackend.SpringbackendApplication.initializeFirebase(SpringbackendApplication.java:188)
    at live.cibc.labs.springbackend.SpringbackendApplication.main(SpringbackendApplication.java:61)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: org.json.JSONException: JSONObject["project_id"] not found.

顯然，它找不到我的project_id，因為我的google-services.json位於src/main/resources/google-services.json 。

我應該如何獲取路徑盡可能健壯的方式？

谷歌，services.json

{
  "project_info": {
    "project_number": "XXXXXXXX",
    "firebase_url": "https://XXXXXX.firebaseio.com",
    "project_id": "XXXX-XXX",
    "storage_bucket": "XXXXXXXX.appspot.com"
  },
  "client": [
    {
      "client_info": {
        "mobilesdk_app_id": "1:XXXXXXXXX:android:XXXXXXX",
        "android_client_info": {
          "package_name": "my.spring.project"
        }
      },
      "oauth_client": [
        {
          "client_id": "XXXXX-XXXXX.apps.googleusercontent.com",
          "client_type": 3
        }
      ],
      "api_key": [
        {
          "current_key": "XXXXXX"
        }
      ],
      "services": {
        "analytics_service": {
          "status": 1
        },
        "appinvite_service": {
          "status": 1,
          "other_platform_oauth_client": []
        },
        "ads_service": {
          "status": 2
        }
      }
    }
  ],
  "configuration_version": "1"
}

Answer 1

答案最終對我而言真是愚蠢！ 在Firebase控制台中，您可以下載2個JSON文件。

• google-services.json用於客戶端
• service-account-credentials.json用於服務器admin SDK（我應該一直使用的那個）

不要把兩者混在一起！

Answer 2

如果我正確理解您使用Spring，那么最好的方法是使用Springs ClassPathResource ：

public static void initializeFirebase() {    
  try {
      Resource googleServicesResource = new ClassPathResource("google-services.json");
      FirebaseOptions options = new FirebaseOptions
              .Builder()
              .setServiceAccount(googleServicesResource.getInputStream())
              .setDatabaseUrl("https://XXXXX.firebaseio.com/")
              .build();
      FirebaseApp.initializeApp(options);
  } catch (IOException e) {
      e.printStackTrace();
  }
}