如何将PDF转换为XLSX Formatt的Excel工作表

Question

我必须将pdf转换为任何格式的excel ...它会生成一个excel工作表，但没有写任何内容

Document doc = new Document("C:\\Users\\user\\Desktop\\pdf\\NL-28.pdf");
ExcelSaveOptions ex = new ExcelSaveOptions();
doc.save("C:\\Users\\user\\Desktop\\pdf\\NL-28.xml", ex);
com.aspose.cells.Workbook workbook = new com.aspose.cells.Workbook("C:\\Users\\user\\Desktop\\pdf\\NL-28.xml");
workbook.save("C:\\Users\\user\\Desktop\\pdf\\NL-28.xlsx", com.aspose.cells.SaveFormat.XLSX);