使用Apache POI下载文件

时间:2016-03-11 09:52:07

标签: java download apache-poi

我目前使用的是Apache POI。为了开发我的应用程序,我使用了大多数教程中提出的方法。

public void generateExcel() {

    HSSFWorkbook wb = new HSSFWorkbook();
    HSSFSheet sheet = wb.createSheet("ma feuille");

    HSSFRow row = sheet.createRow(0);
    HSSFCell cell = row.createCell((short)0);
    cell.setCellValue(10);

    row.createCell((short)1).setCellValue(20);

    FileOutputStream fileOut;
    try {
      fileOut = new FileOutputStream("monfichier.xls");
      wb.write(fileOut);
      fileOut.close(); 
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
}

但是为了进一步开发,我需要能够下载文件,而不仅仅是在目录中创建。我看了一点HttpServletRequest,但我完全迷失了。

提前谢谢!

1 个答案:

答案 0 :(得分:0)

您需要创建某种端点来调用,即Spring Controller端点。你应该调用这个函数:

public void createExcelFile(final HttpServletResponse response) {
    XSSFWorkbook xssfWorkbook = null;
    try {
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setHeader("Content-Disposition", "attachment; filename=" file.xlsx");

        xssfWorkbook = new XSSFWorkbook();
        final XSSFSheet sheet = xssfWorkbook.createSheet("sheet1");

        writeExcelOutputData(//WRITE DATA TO FILE/SHEET/CELLS);

        xssfWorkbook.write(response.getOutputStream());
        xssfWorkbook.close();
    } catch (final Exception e) {
        LOGGER.error("File not created for download"));
    }
}