3-Heights® PDF to Image Converter - convertir PDF en images en Java, C# ou par lots

// Create the converter
converter = new Pdf2Img();

// Open input file
if (!converter.open(inputPath, ""))
    throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
        inputPath, converter.getErrorMessage(), converter.getErrorCode()));

// Loop over all pages of input file and create each time a new PNG
for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
{
    // Construct path of output image in case of a multi-page input PDF
    String imagePath = outputPath.substring(0, outputPath.lastIndexOf(".")) + pageNo + ".png";

    // Create output PNG
    if (!converter.createImage(imagePath))
        throw new IOException(String.format("Output image %s cannot be created. " + 
            "%s (ErrorCode: 0x%08x).",imagePath, converter.getErrorMessage(), 
            converter.getErrorCode()));

    // Render page from PDF to output PNG
    if (!converter.renderPage(pageNo))
        throw new IOException(String.format("Page %d of PDF %d could not be rendered to PNG %s. " + 
            "%s (ErrorCode: 0x%08x).", pageNo, inputPath, imagePath, converter.getErrorMessage(), 
            converter.getErrorCode()));

    // Close output image
    if (!converter.closeImage())
        throw new IOException(String.format("Output image %s cannot be closed. " + 
            "%s (ErrorCode: 0x%08x).", imagePath, converter.getErrorMessage(), 
            converter.getErrorCode()));
}

// Create the converter
pConverter = Pdf2ImgCreateObject();

// Open input file
if (!Pdf2ImgOpen(pConverter, szInputPath, _T("")))
{
    _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szOutputPath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
    iReturnValue = 1;
    goto cleanup;
}

// Loop over all pages of input file and create each time a new PNG
for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
{
    // Change file name and extension
    _tcstok(szOutputPath, _T("."));
    _stprintf(szImagePath, _T("%s%d.png"), szOutputPath, iPage);

    // Create output PNG
    if (!Pdf2ImgCreateImage(pConverter, szImagePath))
    {
        _tprintf(_T("Output image %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
        iReturnValue = 1;
        goto cleanup;
    }

    // Render page from PDF to output PNG
    if (!Pdf2ImgRenderPage(pConverter, iPage))
    {
        _tprintf(_T("Page %d of PDF %s could not be rendered to PNG %s. %s (ErrorCode: 0x%08x).\n"), iPage, szInputPath, szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
        iReturnValue = 1;
        goto cleanup;
    }

    // Close output image
    if (!Pdf2ImgCloseImage(pConverter))
    {
        _tprintf(_T("Output image %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
        iReturnValue = 1;
        goto cleanup;
    }
}