public byte[] autoPrintPdf(byte[] pdf_byte) {   ByteArrayOutputStream bos=null;   try {    PdfReader reader = new PdfReader(pdf_byte);    bos = new ByteArrayOutputStream();    PdfStamper ps = new PdfStamper(reader, bos);    StringBuffer script = new StringBuffer();    script.append("this.print({bUI: false,bSilent: true,bShrinkToFit: false});").append("rnthis.closeDoc();");    ps.addJavaScript(script.toString()); //   ps.addJavaScript("this.print(true);");    ps.setFormFlattening(true);    ps.close();      } catch (Exception e) {    e.printStackTrace();   }   return bos.toByteArray();  }