com.google.api.client.googleapis.auth.oauth2.GoogleCredential 现在已弃用

Question

Google 的视觉 API 的 sample code 显示了这一点：

  public static Vision getVisionService() throws IOException, GeneralSecurityException {
    GoogleCredential credential =
        GoogleCredential.getApplicationDefault().createScoped(VisionScopes.all());
    JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
    return new Vision.Builder(GoogleNetHttpTransport.newTrustedTransport(), jsonFactory, credential)
            .setApplicationName(APPLICATION_NAME)
            .build();
  }

但com.google.api.client.googleapis.auth.oauth2.GoogleCredential 现在已弃用。现在验证上述内容的正确方法是什么？

Answer 1

您可以通过多种方式做到这一点。

选项 1：

1. 按照此quickstart page 上的步骤进行操作
2. 设置GOOGLE_APPLICATION_CREDENTIALS，这是客户端库默认使用的东西

选项 2：

1. 自己加载服务密钥文件。

// imports
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.auth.Credentials;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.vision.v1.ImageAnnotatorClient;
import com.google.cloud.vision.v1.ImageAnnotatorSettings;

import java.io.FileInputStream;

// somewhere in your code, load the credentials
try {
  Credentials credentials = GoogleCredentials.fromStream(
        new FileInputStream("path_to_file.json"));

  FixedCredentialsProvider fixedCredentialsProvider =
        FixedCredentialsProvider.create(credentials);

  ImageAnnotatorSettings settings = 
        ImageAnnotatorSettings.newBuilder()
           .setCredentialsProvider(
               fixedCredentialsProvider).build();

  ImageAnnotatorClient client = 
        ImageAnnotatorClient.create(settings);
catch(IOException e) {
  e.printStackTrace(e);
}