Cắt tài liệu PDF trong SDK Java

    package com.aspose.asposecloudpdfusecases.change_layout;

    import java.io.File;
    import java.nio.file.Path;
    import java.nio.file.StandardCopyOption;
    import com.aspose.asposecloudpdf.api.PdfApi;
    import com.aspose.asposecloudpdf.model.AsposeResponse;
    import com.aspose.asposecloudpdf.model.Rectangle;
    import com.aspose.asposecloudpdfusecases.acroforms.AcroformHelper;
    import com.aspose.asposecloudpdfusecases.annotations.AnnotationsHelper;

    public class CropDocumentPages {
        public static void Perform() {
            String REMOTE_FOLDER   = "Your_Temp_Pdf_Cloud";
            String LOCAL_FOLDER    = "c:\\Samples";
            String PDF_DOCUMENT    = "sample.pdf";
            String PDF_OUTPUT      = "crop_document_pages_output.pdf";
            Double CROP_HEIGHT     = 400.;
            Double CROP_WIDTH      = 800.;
            Double CROP_LLX        = 0.;
            Double CROP_LLY        = 0.;

            try {
                PdfApi pdfApi = new PdfApi(API_KEY, API_SECRET);

                // upload local PDF file to remote storage
                File file = new File(Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString());
                pdfApi.uploadFile(Path.of(REMOTE_FOLDER , PDF_DOCUMENT).toString(), file, null);
                System.out.println(String.format("File '%s' successfully uploaded!", Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString()));

                Rectangle rect = new Rectangle()
                    .LLX(CROP_LLX)
                    .LLY(CROP_LLY)
                    .URX(CROP_WIDTH)
                    .URY(CROP_HEIGHT);

                AsposeResponse response = pdfApi.postDocumentPagesCrop(PDF_DOCUMENT, "2-3", rect, null, REMOTE_FOLDER, null);
                if (response.getCode() != 200)
                    System.err.println("Error: unexpected error when cropping pages! '" + response.getStatus() + "'");
                else {
                    // download changed PDF file from remote folder...
                        File f = pdfApi.downloadFile(Path.of(REMOTE_FOLDER , PDF_DOCUMENT).toString(), null, null);
                        java.nio.file.Files.copy(Path.of(f.getPath()), Path.of(LOCAL_FOLDER, PDF_OUTPUT), StandardCopyOption.REPLACE_EXISTING);
                        System.out.println(String.format("File '%s' successfully dowloaded!", Path.of(LOCAL_FOLDER, PDF_OUTPUT).toString()));                
                        System.out.println("Successfully cropped pages in document ! '" + PDF_OUTPUT + "'");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }