如何将iText PDF文档返回给客户端

我试图将iText生成的PDF从服务器端返回到客户端，以使用户能够存储它 . 我关注How to convert iTextPDF Document to Byte Array（AceFunk）

private static ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

  public static byte[] main(java.util.List<Transcript> listymAwards, String scoutName, String groupName) {
  Document document = new Document(PageSize.A4, 0f, 0f, 0f, 0f);

try {

  //PdfWriter.getInstance(document, new FileOutputStream(FILE));
  PdfWriter.getInstance(document, byteArrayOutputStream);  // Do this BEFORE document.open()

  document.open();
  addMetaData(document);
  addImages(document);
  addTitlePage(document, scoutName);

  //Add the table of achievements
  if (listymAwards == null || listymAwards.isEmpty()) {
      //Nothing to do.
      //System.out.println("Scout not found.");
  }else{

      Paragraph preface = new Paragraph();

      PdfPTable table = new PdfPTable(3);
      table.setWidths(new int[]{1, 3, 1});
      table.setHeaderRows(1);

      PdfPCell c1 = new PdfPCell(new Phrase("Section"));
      c1.setHorizontalAlignment(Element.ALIGN_CENTER);
      table.addCell(c1);

      c1 = new PdfPCell(new Phrase("Award"));
      c1.setHorizontalAlignment(Element.ALIGN_CENTER);
      table.addCell(c1);

      c1 = new PdfPCell(new Phrase("Date"));
      c1.setHorizontalAlignment(Element.ALIGN_CENTER);
      table.addCell(c1);
      table.setHeaderRows(1);

      String storedName = null;
      int noRows = 0;
      String firstTable = "Yes";
      DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");
      DateFormat df2 = new SimpleDateFormat("dd-MM-yyyy");
      // We add three empty lines
      addEmptyLine(preface, 1);
      addEmptyLine(preface, 1);
      addEmptyLine(preface, 1);

      for (final Transcript scoutNamesDescription : listymAwards) {
          if (firstTable.equals("Yes") && noRows > 30){ // Change this to number of rows required
              noRows = 0;
              firstTable = "No";
              document.add(table);
              document.newPage();
              table.flushContent();
          }else{
              if (firstTable.equals("No") && noRows > 50){ // Change this to number of rows required
                  // We add three empty lines if not the first table
                  document.add(preface);
              }
          }

          noRows++;

          if (scoutNamesDescription.getSection().equals(storedName)){
              table.addCell(" ");
          }else{
              storedName = scoutNamesDescription.getSection();
              table.addCell(scoutNamesDescription.getSection());
          }
          table.addCell(scoutNamesDescription.getAwardName());

          Date awardedDate = df1.parse(scoutNamesDescription.getAwardedDate());
          String awardedString = df2.format(awardedDate);
          table.addCell(awardedString);
      }
      //Print the remaining rows.
      // We add three empty lines if not the first table
      if (firstTable.equals("No")){
          document.add(preface);
      }else{
          firstTable = "No";
      }
      document.add(table);
  }

  //Add signature
  addSignaturePage(document, groupName);

  document.close();


} catch (Exception e) {
  e.printStackTrace();
}

byte[] pdfBytes = byteArrayOutputStream.toByteArray();
return pdfBytes;

}

这将返回到服务器端：

byte[] pdfBytes = ScoutTranscript.main(listymAwards, scoutName, groupName);
    System.out.println("Point 3");

    return pdfBytes;

然后返回到客户端：

Window.open("data:application/pdf;base64,"+result,"_parent", "location=no");

我收到错误消息的地方：

This site can’t be reached

The webpage at data:application/pdf;base64,[B@154 might be temporarily down or it may have moved permanently to a new web address.