import com.google.api.services.vision.v1.model.BatchAnnotateImagesRequest; //导入依赖的package包/类
private BatchAnnotateImagesRequest createRequest() {
    ImmutableList.Builder<AnnotateImageRequest> requests = ImmutableList.builder();
    requestFiles.forEach(f -> {
        requests.add(
                new AnnotateImageRequest()
                        .setImage(new Image().encodeContent(f.getContent()))
                        .setFeatures(ImmutableList.of(
                                new Feature()
                                        .setType("TEXT_DETECTION")
                                        .setMaxResults(config.getMaxResult())
                        ))
        );
    });

    return new BatchAnnotateImagesRequest().setRequests(requests.build());
}
 

import com.google.api.services.vision.v1.model.BatchAnnotateImagesRequest; //导入依赖的package包/类
/**
 * Construct an annotated image request for the provided image to be executed
 * using the provided API interface.
 *
 * @param imageBytes image bytes in JPEG format.
 * @return collection of annotation descriptions and scores.
 */
public static Map<String, Float> annotateImage(byte[] imageBytes) throws IOException {
    // Construct the Vision API instance
    HttpTransport httpTransport = AndroidHttp.newCompatibleTransport();
    JsonFactory jsonFactory = GsonFactory.getDefaultInstance();
    VisionRequestInitializer initializer = new VisionRequestInitializer(CLOUD_VISION_API_KEY);
    Vision vision = new Vision.Builder(httpTransport, jsonFactory, null)
            .setVisionRequestInitializer(initializer)
            .build();

    // Create the image request
    AnnotateImageRequest imageRequest = new AnnotateImageRequest();
    Image img = new Image();
    img.encodeContent(imageBytes);
    imageRequest.setImage(img);

    // Add the features we want
    Feature labelDetection = new Feature();
    labelDetection.setType(LABEL_DETECTION);
    labelDetection.setMaxResults(MAX_LABEL_RESULTS);
    imageRequest.setFeatures(Collections.singletonList(labelDetection));

    // Batch and execute the request
    BatchAnnotateImagesRequest requestBatch = new BatchAnnotateImagesRequest();
    requestBatch.setRequests(Collections.singletonList(imageRequest));
    BatchAnnotateImagesResponse response = vision.images()
            .annotate(requestBatch)
            // Due to a bug: requests to Vision API containing large images fail when GZipped.
            .setDisableGZipContent(true)
            .execute();

    return convertResponseToMap(response);
}
 

import com.google.api.services.vision.v1.model.BatchAnnotateImagesRequest; //导入依赖的package包/类
@Test
    public void testTextDetection() throws Exception {

        // 認証情報
        GoogleCredential credential = GoogleCredential.fromStream(
                    Files.newInputStream(Paths.get("/tmp/google-cloud-api-service-account.json")))
                    .createScoped(VisionScopes.all());
//        GoogleCredential credential = GoogleCredential.getApplicationDefault().createScoped(VisionScopes.all());

        // Google Cloud Vision APIクライアント
        Vision vision = new Vision.Builder(GoogleNetHttpTransport.newTrustedTransport(), JacksonFactory.getDefaultInstance(), credential)
                .setApplicationName("GoogleVisionApiClient/1.0")
                .build();

        // 解析対象画像ファイルごとに処理を行う
        ImmutableList<String> imageFiles = ImmutableList.<String>of(
                "/tmp/sample1.jpg",
                "/tmp/sample2.jpg",
                "/tmp/sample3.jpg",
                "/tmp/sample4.jpg"
                );
        ImmutableList.Builder<AnnotateImageRequest> requests = ImmutableList.builder();
        imageFiles.forEach(f -> {
            byte[] data = new byte[0];
            try {
                data = Files.readAllBytes(Paths.get(f));
                requests.add(
                        new AnnotateImageRequest()
                                .setImage(new Image().encodeContent(data))
                                .setFeatures(ImmutableList.of(
                                        new Feature()
                                                .setType("TEXT_DETECTION")
                                                .setMaxResults(1)
                                ))
                );
            } catch (IOException e) {
                e.printStackTrace();
            }
        });

        // 実行
        Vision.Images.Annotate annotate =
                vision.images().annotate(new BatchAnnotateImagesRequest().setRequests(requests.build()));
        annotate.setDisableGZipContent(true);
        BatchAnnotateImagesResponse batchResponse = annotate.execute();

        batchResponse.getResponses().forEach(response -> {
            List<EntityAnnotation> entityAnnotations =
                    MoreObjects.firstNonNull(response.getTextAnnotations(), ImmutableList.<EntityAnnotation>of());
            entityAnnotations.stream()
                    .findFirst()
                    .ifPresent(a -> {
                        System.out.println(a.getDescription());
                        System.out.println("----------------------------------------------------");
                    });
        });
    }