Question

我需要将 xlsx 文档转换为 pdf 格式。我知道 iText 可以保存pdf文档， Docx4j 可以读取和写入xslx。事实上，我们的应用程序同时用于构建报告。但是我们有非常困难的模板，因此我不能只读取xslx（docx4j）并将其写入pdf（iText）。格式化将丢失，所以我需要另一个转换库。我也听说过像（Jxcell ）这样的商业图书馆，但想要使用开源解决方案。

任何人都可以帮助我吗？

Answer 1

我使用了iText和apache poi：

    FileInputStream filecontent = new FileInputStream(new File(sourcepath));
    FileOutputStream out = new FileOutputStream(new File(destinationPath));
    HSSFWorkbook my_xls_workbook = null;
    HSSFSheet my_worksheet = null;
    XSSFWorkbook my_xlsx_workbook = null;
    XSSFSheet my_worksheet_xlsx = null;
    Document document = new Document(PageSize.ARCH_E, 0, 0, 0, 0);
    PdfWriter writer = PdfWriter.getInstance(document, out);
    document.open();
    PdfDestination magnify = null;
    float magnifyOpt = (float) 70.0;
    magnify = new PdfDestination(PdfDestination.XYZ, -1, -1, magnifyOpt / 100);
    int pageNumberToOpenTo = 1;
    PdfAction zoom = PdfAction.gotoLocalPage(pageNumberToOpenTo, magnify, writer);
    writer.setOpenAction(zoom);
    document.addDocListener(writer);

    Iterator<Row> rowIterator = null;
    int maxColumn = 0;
    if (fileType.equals(".xls")) {
        try {
            my_xls_workbook = new HSSFWorkbook(filecontent);
            my_worksheet = my_xls_workbook.getSheetAt(0);
            rowIterator = my_worksheet.iterator();
            maxColumn = my_worksheet.getRow(0).getLastCellNum();
        } catch (IOException ex) {
            Logger.getLogger(PdfConversion.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    if (fileType.equals(".xlsx")) {
        try {
            my_xlsx_workbook = new XSSFWorkbook(filecontent);
            my_worksheet_xlsx = my_xlsx_workbook.getSheetAt(0);
            rowIterator = my_worksheet_xlsx.iterator();
            maxColumn = my_worksheet_xlsx.getRow(0).getLastCellNum();
        } catch (IOException ex) {
            Logger.getLogger(PdfConversion.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    PdfPTable my_table = new PdfPTable(maxColumn);
    my_table.setHorizontalAlignment(Element.ALIGN_CENTER);
    my_table.setWidthPercentage(100);
    my_table.setSpacingBefore(0f);
    my_table.setSpacingAfter(0f);
    PdfPCell table_cell;
    while (rowIterator.hasNext()) {
        Row row = rowIterator.next();
        Iterator<Cell> cellIterator = row.cellIterator();
        while (cellIterator.hasNext()) {
            Cell cell = cellIterator.next(); //Fetch CELL
            switch (cell.getCellType()) { //Identify CELL type
                case Cell.CELL_TYPE_STRING:
                    //Push the data from Excel to PDF Cell
                    table_cell = new PdfPCell(new Phrase(cell.getStringCellValue()));
                    if (row.getRowNum() == 0) {
                        table_cell.setBackgroundColor(BaseColor.LIGHT_GRAY);
                        table_cell.setBorderColor(BaseColor.BLACK);
                    }
                    my_table.addCell(table_cell);
                    break;
            }
        }
    }
    document.add(my_table);
    document.close();
    System.out.println("Excel file converted to PDF successfully");

Answer 2

是否必须用Java完成？如果是，请查看Apache POI

否则，为什么不使用一个使用PDF打印机的小型本机应用程序，并调用相关的API将文件直接打印到PDF？当然Java并不是真正做这种工作的......

例如，这是一个非Java框架：PDF Class Library from Solidworks

java excel到pdf转换

2 个答案: