Aspose-将Excel转换为PDF速度很慢

Question

Am using Aspose and it is very slow in converting Excel to PDF. I have generated XSSFWorkbook

ByteArrayOutputStream excelAsByteArrayOutStream = new ByteArrayOutputStream();
xssfWorkbook.write(out_excel);
excelAsByteArrayOutStream.close();

ByteArrayOutputStream pdfAsByteArrayOutStream = new ByteArrayOutputStream();
Workbook workbook = new Workbook(new ByteArrayInputStream(excelAsByteArrayOutStream.toByteArray()));
workbook.save(out, SaveFormat.PDF);

Any other faster way to achieve this.

Answer 1

Generally, Aspose.Cells for Java is fast and efficient to convert bigger MS Excel workbooks to PDF file format. I guess the slowness issue might be on XSSFWorkbook part which is writing byte array. Or the issue might be in the module for extracting/loading file from streams. For confirmation, you may only use Aspose.Cells APIs (without involving XSSFWorkbook) to load the file from streams and then save to PDF file format. eg Sample code:

Path fileLocation = Paths.get("your_file.xlsx");
byte[] bytes = Files.readAllBytes(fileLocation);

try (FileOutputStream simpleStream = new FileOutputStream("no_aspose_file.xlsx")) {
    simpleStream.write(bytes);
}
Workbook workbook = new Workbook(new ByteArrayInputStream(bytes));
ByteArrayOutputStream dstStream = new ByteArrayOutputStream();
PdfSaveOptions saveOptions = new PdfSaveOptions(SaveFormat.PDF);
// Save Workbook to PDF format by passing the object of PdfSaveOptions
workbook.save(dstStream, saveOptions);
..........

I would recommend you to try latest version/fix v19.8 which has more enhancements. PS. I am working as Support developer/ Evangelist at Aspose.