只有一个文件正在写入zip

Question

我想将多个xssf文件写入zip并下载。我使用以下代码但每次只有一个xssf文件在zip文件夹中。 我正在使用JSF下载zip。

public void downloadData（）抛出异常{

    FacesContext fc = FacesContext.getCurrentInstance();
    setSourceList(new ArrayList<String>());
    setTargetList(new ArrayList<String>());

    List<String> tempList = dualList.getTarget();

    System.out.println(tempList.size());

    if (tempList != null && tempList.size() > 0) {

        ExternalContext ec = fc.getExternalContext();
        ec.responseReset();

        ec.setResponseContentType("application/zip");
        ec.setResponseHeader("Content-Disposition", "attachment; filename=\"Export.zip\"");
        ByteArrayOutputStream outByteStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outByteStream);
        OutputStream outStream = ec.getResponseOutputStream();

        for (int i = 0; i < tempList.size(); i++) {

            outByteStream = new ByteArrayOutputStream();
            zip = new ZipOutputStream(outByteStream);
            // outStream = ec.getResponseOutputStream();

            int id = ownerNameIdMap.get(tempList.get(i));
            String oName = tempList.get(i);
            String fileName = oName + ".xlsx";

            if (petList != null && petList.size() > 0) {
                petList.clear();
            }

            workBook = new XSSFWorkbook();

            OwnerModel ownerModel = ownerMap.get(id);
            ownerFirstName = ownerModel.getFirstName();
            ownerLastName = ownerModel.getLastName();
            workSheet = workBook.createSheet(ownerLastName + ", " + ownerFirstName);
            petList = iOwnerRepository.getActivePetsOfOwner(ownerModel.getId());
            petCount = petList.size();
            createMasterSheet();
            renderSheet(ownerModel);

            workBook.write(outByteStream);
            addEntry(zip, fileName, outByteStream);
            workBook.write(zip);

            outStream.write(outByteStream.toByteArray());
            outStream.flush();

        }
        outStream.close();

        // zip.closeEntry();
        zip.close();
        fc.responseComplete();

    }

}
 public void addEntry(ZipOutputStream zip, String filename, ByteArrayOutputStream os) {

     System.out.println(filename);
        byte[] bytes = os.toByteArray();

    //    ZipEntry entry = new ZipEntry(filename);
      //  Date d = new Date();
       // entry.setTime(d.getTime());
        try {
            ((ZipOutputStream) zip).putNextEntry(new ZipEntry(filename));
            ((ZipOutputStream) zip).write(bytes);
            ((ZipOutputStream) zip).closeEntry();
        } catch (IOException e) {
            log.error("Can't read the file !", e);
        } catch (ClassCastException cce) {
            log.error("Bad format !", cce);
        }
 }