Question

In my web application, as per the requirement I need to print PDF file to laser printer without opening windows default “Print” popup.

So here I am using applet to print the bytes which are stored in HTML text area.

But it seems that the bytes generated after new String(pdf.getByte[]) is different than the actual PDF bytes.

In my controller I am storing the bytes to request scope as mentioned below :

request.setAttribute(PageRenderConstant.MULTI_SEL_PDF,new String(printOutputVO.getPdfBytes()));

And in HTML … I am storing the byte as below ..

<textarea style="visibility: hidden;"  name="laserPrintData"  id="laserPrintData" >
   ${multiselpdffile}                   
</textarea>

And here is the applet code to print the document to laser pritner…

function print(){                                                           
  var applet = document.jZebra;
  if (applet != null) {    
  var data = $("#laserPrintData").val();
  //applet.append(data);
  applet.appendPDF(data);              
  applet.printPS();
  }
}

But it says “The provided PDF is corrupted file.” So the bytes after new String() operation are different.

So How can I retain the same bytes as it was before new String() operation ??

Answer 1

Use Base64 methods to convert byte[] to String and decode it back to byte[]

public static byte[] decode(String encoded)
public static String encode(byte[] binaryData) {