java控制Pdf自动打印的小例子

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("\r\nthis.closedoc();");
   ps.addjavascript(script.tostring());
//   ps.addjavascript("this.print(true);");
   ps.setformflattening(true);
   ps.close();   
  } catch (exception e) {
   e.printstacktrace();
  }
  return bos.tobytearray();
 }