我有用于Google Vision API的代码。我将Google凭据用作路径和环境变量，但是Page<Bucket> buckets = storage.list();不返回任何内容，并且错误显示在try (ImageAnnotatorClient client = ImageAnnotatorClient.create())
这是代码：
public static void main(String... args) throws Exception {
authExplicit("D:\\bp-mihalova\\2\\apikey.json");
detectLabels("D:\\bp-mihalova\\2\\Jellyfish.jpg", System.out);
}
public static void detectLabels(String filePath, PrintStream out) throws Exception, IOException {
List<AnnotateImageRequest> requests = new ArrayList<>();
ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));
Image img = Image.newBuilder().setContent(imgBytes).build();
Feature feat = Feature.newBuilder().setType(Type.LABEL_DETECTION).build();
AnnotateImageRequest request =
AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();
requests.add(request);
try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
List<AnnotateImageResponse> responses = response.getResponsesList();
for (AnnotateImageResponse res : responses) {
if (res.hasError()) {
out.printf("Error: %s\n", res.getError().getMessage());
return;
}
// For full list of available annotations, see http://g.co/cloud/vision/docs
for (EntityAnnotation annotation : res.getLabelAnnotationsList()) {
annotation.getAllFields().forEach((k, v) -> out.printf("%s : %s\n", k, v.toString()));
}
}
}
}
static void authExplicit(String jsonPath) throws IOException {
// You can specify a credential file by providing a path to GoogleCredentials.
// Otherwise credentials are read from the GOOGLE_APPLICATION_CREDENTIALS environment variable.
GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))
.createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();
System.out.println("Buckets:");
Page<Bucket> buckets = storage.list();
for (Bucket bucket : buckets.iterateAll()) {
System.out.println(bucket.toString());
}
}
这是带有空Buckets和错误的控制台：
Buckets:
Exception in thread "main" java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.
at com.google.auth.oauth2.DefaultCredentialsProvider.getDefaultCredentials(DefaultCredentialsProvider.java:132)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:127)
at com.google.auth.oauth2.GoogleCredentials.getApplicationDefault(GoogleCredentials.java:100)
at com.google.api.gax.core.GoogleCredentialsProvider.getCredentials(GoogleCredentialsProvider.java:59)
at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:132)
at com.google.cloud.vision.v1.stub.GrpcImageAnnotatorStub.create(GrpcImageAnnotatorStub.java:84)
at com.google.cloud.vision.v1.stub.ImageAnnotatorStubSettings.createStub(ImageAnnotatorStubSettings.java:120)
at com.google.cloud.vision.v1.ImageAnnotatorClient.<init>(ImageAnnotatorClient.java:136)
at com.google.cloud.vision.v1.ImageAnnotatorClient.create(ImageAnnotatorClient.java:117)
at com.google.cloud.vision.v1.ImageAnnotatorClient.create(ImageAnnotatorClient.java:108)
at sk.Google.detectLabels(Google.java:40)
at sk.Google.main(Google.java:26)
Process finished with exit code 1
答案 0 :(得分：0)
发生此错误是因为ImageAnnotatorClient client = ImageAnnotatorClient.create()需要默认凭据或在环境变量中设置的服务帐户。
我成功使用以下代码发出了请求：
package com.example.vision;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.FileInputStream;
import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.io.PrintStream;
import com.google.cloud.vision.v1.ImageAnnotatorSettings;
import com.google.api.gax.core.FixedCredentialsProvider;
import com.google.cloud.vision.v1.AnnotateImageRequest;
import com.google.cloud.vision.v1.AnnotateImageResponse;
import com.google.cloud.vision.v1.BatchAnnotateImagesResponse;
import com.google.cloud.vision.v1.EntityAnnotation;
import com.google.cloud.vision.v1.Feature;
import com.google.cloud.vision.v1.Feature.Type;
import com.google.cloud.vision.v1.Image;
import com.google.cloud.vision.v1.ImageAnnotatorClient;
import com.google.protobuf.ByteString;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
public class Sample {
public static void main(String...args) throws Exception {
String jsonPath = "../../key.json";
authExplicit(jsonPath);
detectLabels(jsonPath, "../wakeupcat.jpg", System.out);
}
static void authExplicit(String jsonPath) throws IOException {
GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))
.createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();
System.out.println("Buckets:");
Page < Bucket > buckets = storage.list();
for (Bucket bucket: buckets.iterateAll()) {
System.out.println(bucket.toString());
}
}
public static void detectLabels(String jsonPath, String filePath, PrintStream out) throws Exception, IOException {
GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))
.createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));
List < AnnotateImageRequest > requests = new ArrayList < > ();
ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));
Image img = Image.newBuilder().setContent(imgBytes).build();
Feature feat = Feature.newBuilder().setType(Type.LABEL_DETECTION).build();
AnnotateImageRequest request =
AnnotateImageRequest.newBuilder().addFeatures(feat).setImage(img).build();
requests.add(request);
//Setting the credentials:
ImageAnnotatorSettings imageAnnotatorSettings = ImageAnnotatorSettings.newBuilder()
.setCredentialsProvider(FixedCredentialsProvider.create(credentials))
.build();
try (ImageAnnotatorClient client = ImageAnnotatorClient.create(imageAnnotatorSettings)) {
BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
List < AnnotateImageResponse > responses = response.getResponsesList();
for (AnnotateImageResponse res: responses) {
if (res.hasError()) {
out.printf("Error: %s\n", res.getError().getMessage());
return;
}
// For full list of available annotations, see http://g.co/cloud/vision/docs
for (EntityAnnotation annotation: res.getLabelAnnotationsList()) {
annotation.getAllFields().forEach((k, v) -> out.printf("%s : %s\n", k, v.toString()));
}
}
}
}
}