Google vision API 从文件中加载凭据答案

【问题标题】：Google vision API load credentials from fileGoogle vision API 从文件中加载凭据
【发布时间】：2018-02-18 10:08:11
【问题描述】：

我想在创建 Annotator 客户端时使用不同的凭据文件。我目前可以像这样使用 transalte API 来做到这一点：

 Credentials creds = ServiceAccountCredentials.fromStream(new FileInputStream("path/to/credentials.json"));
 return TranslateOptions.newBuilder().setCredentials(creds).build().getService();

ImageAnnotatorClient 有没有等效的方法？

编辑：我正在使用 google cloud java sdk 版本：1.16.0

【问题讨论】：

标签： java credentials google-cloud-vision

【解决方案1】：

Credentials?->CredentialsProvider?

ImageAnnotatorSettings.Builder -> ImageAnnotatorSettings -> ImageAnnotatorClient

示例（主要从文档中复制）：

Credentials myCredentials = ServiceAccountCredentials.fromStream(
    new FileInputStream("path/to/credentials.json"));

ImageAnnotatorSettings imageAnnotatorSettings =
    ImageAnnotatorSettings.newBuilder()
    .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
    .build();

ImageAnnotatorClient imageAnnotatorClient =
    ImageAnnotatorClient.create(imageAnnotatorSettings);

ImageAnnotatorClient：com.google.cloud.vision.v1.ImageAnnotatorClient?
ImageAnnotatorSettings：com.google.cloud.vision.v1.ImageAnnotatorSettings?
ClientSettings.Builder：com.google.api.gax.rpc.ClientSettings.Builder?
FixedCredentialsProvider: com.google.api.gax.core.FixedCredentialsProvider ?
ServiceAccountCredentials：com.google.auth.oauth2.ServiceAccountCredentials?

注意：以上内容适用于 Java。 API for C# 不同。

【讨论】：

这是什么版本？我正在链接 1.16.0，您在示例中说明的大多数方法都不存在
刚刚注意到您引用的文档是针对 0.8.3 版的，并且似乎他们已经删除了许多方法和类。

【解决方案2】：

private static ImageAnnotatorSettings  setImageAnnotator() {
    Credentials myCredentials = null;
    try {
        myCredentials = ServiceAccountCredentials.fromStream(
                new FileInputStream("C:\\Users\\Pictures\\Cloudvision\\credentials.json"));
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
        ImageAnnotatorSettings imageAnnotatorSettings = null;
        try {
            imageAnnotatorSettings = ImageAnnotatorSettings.newBuilder()
            .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
            .build();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

【讨论】：

或许添加一些解释？