Java tutorial
/* This file is part of Seedoo. The COPYRIGHT file at the top level of this module contains the full copyright notices and license terms. */ package com.innoviu.signature; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import com.itextpdf.text.BaseColor; import com.itextpdf.text.DocumentException; import com.itextpdf.text.pdf.BaseFont; import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.PdfStamper; import com.itextpdf.text.pdf.PdfContentByte; public class Signature { private static void maintain(String path) { try { File maintain = new File(path + ".enc"); maintain.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } private static void fail(String path) { try { File fail = new File(path + ".fail"); fail.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { boolean isEncrypted = false; boolean isFailed = false; try { if (args.length < 2) { throw new FileNotFoundException(); } PdfReader reader = new PdfReader(args[0]); isEncrypted = reader.isEncrypted(); String suffix = ".pdf"; if (isEncrypted) { System.out.println("Encrypted"); String[] cmd = { "pdftk", args[0], "output", args[0] + ".pdftk.pdf" }; try { Process proc = Runtime.getRuntime().exec(cmd); proc.waitFor(); } catch (Exception e) { System.out.println("Exception is:" + e); } reader = new PdfReader(args[0] + ".pdftk.pdf"); suffix = ".dec.pdf"; } PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(args[0] + suffix)); PdfContentByte over = stamper.getOverContent(1); String type = args[2]; int xpos = 0; //int xpos = (type == "in") ? 120 : 10; if ("in".equals(type)) { xpos = 0; } else { xpos = 120; } over.setColorFill(BaseColor.WHITE); over.rectangle(xpos + 10, 8, 120, 8); over.fill(); over.beginText(); BaseFont bf_times = BaseFont.createFont(BaseFont.TIMES_ROMAN, "Cp1252", false); over.setFontAndSize(bf_times, 6); over.setColorFill(BaseColor.BLACK); over.showTextAligned(PdfContentByte.ALIGN_RIGHT, args[1], 120 + xpos, 10, 0); over.endText(); stamper.close(); if (isEncrypted) { File file = new File(args[0] + ".pdftk.pdf"); file.delete(); } } catch (FileNotFoundException e) { isFailed = true; e.printStackTrace(); } catch (DocumentException e) { isFailed = true; e.printStackTrace(); } catch (IOException e) { isFailed = true; e.printStackTrace(); } finally { if (isEncrypted) { maintain(args[0]); } else if (isFailed) { fail(args[0]); } else { } } } }