Compare PDF using java

This post is all about Comparing two PDF files in different ways using PFDBOX and PDFUTIL API'S in Java. It Compares the files in text, JPG and xml formats

package com.nga.comparepdf;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

import org.apache.commons.io.output.NullOutputStream;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.PDFTextStripperByArea;

import com.testautomationguru.utility.CompareMode;
import com.testautomationguru.utility.PDFUtil;

public class FinalPDF {

 private static String Actual_ROI403LPRD_P60 = "Actual_ROI403LPRD_P60.pdf";
 private static String Expected_ROI403LPRD_P60 = "Expected_ROI403LPRD_P60.pdf";
 private static String Actual_ROI404LPRD_P60 = "Actual_ROI404LPRD_P60.pdf";
 private static String Expected_ROI404LPRD_P60 = "Expected_ROI404LPRD_P60.pdf";
 private static String sample = "_20161108_102115.pdf";

 public static void main(String[] args) throws IOException{
  //same files

  //  comparePDF(Actual_ROI403LPRD_P60,Expected_ROI403LPRD_P60,true,false);
  //same files compare pdf as image and xml is true
  //  comparePDF(Actual_ROI403LPRD_P60,Expected_ROI403LPRD_P60,true,true);
  //same number of pages but content is differ
  comparePDF(Actual_ROI403LPRD_P60,Expected_ROI404LPRD_P60,false,true);
  //same number of pages but content is differ and compare as image is true
  //  comparePDF(Actual_ROI403LPRD_P60,Expected_ROI404LPRD_P60,true,false);
  //same number of pages but content is differ and compare as image and xml is true
  //  comparePDF(Actual_ROI403LPRD_P60,Expected_ROI404LPRD_P60,true,true);
  //differ in number of pages
  //  comparePDF(Actual_ROI403LPRD_P60,sample,false,false);
  //null files
  //  comparePDF(null,Actual_ROI404LPRD_P60,false,false);
 }

 public static void comparePDF(String expectedPDF, String actualPDF, boolean comparePdfAsImage, boolean convertPDFToXml) throws IOException{

  String actPdfData = "";
  String expPdfData = "";
  boolean comparePdfAsImages = false;
  boolean convertToXml = false;

  if(!comparePdfAsImages){
   comparePdfAsImages = comparePdfAsImage;
  }
  if(!convertToXml){
   convertToXml = convertPDFToXml;
  }
  List<String> expListData = new ArrayList<String>();
  List<String> actListData = new ArrayList<String>();

  java.lang.System.setErr(new PrintStream(new NullOutputStream()));

  if((expectedPDF  == null || actualPDF ==null)){
   System.out.println("Please provide the file names");
   return;
  }

  //Creating the object for the files
  PDDocument expPdfDocument = PDDocument.load(new File(expectedPDF));
  PDDocument actPdfDocument = PDDocument.load(new File(actualPDF));

  if(!(expPdfDocument.getNumberOfPages() == actPdfDocument.getNumberOfPages())){
   System.out.println("Both the files pages are not equal, first file page count is "+expPdfDocument.getNumberOfPages()+" and second file is "+actPdfDocument.getNumberOfPages());
   return;
  }

  //Gets the PDF document data and stores them into strings
  if (!expPdfDocument.isEncrypted() && !actPdfDocument.isEncrypted()) {
   PDFTextStripperByArea stripper = new PDFTextStripperByArea();
   stripper.setSortByPosition(true);
   PDFTextStripper Tstripper = new PDFTextStripper();
   expPdfData = Tstripper.getText(expPdfDocument);
   actPdfData = Tstripper.getText(actPdfDocument);
  }

  if(expPdfData.equals(actPdfData)){
   System.out.println("Both the files are having same data");
  }

  else{
   //System.out.println("Data in the files are not same");
   StringTokenizer stExpPdf1 = new StringTokenizer(expPdfData,"\n");
   StringTokenizer stActPdf1 = new StringTokenizer(actPdfData,"\n");
   while(stExpPdf1.hasMoreTokens()){
    expListData.add(stExpPdf1.nextToken());
   }

   while(stActPdf1.hasMoreTokens()){
    actListData.add(stActPdf1.nextToken());
   }

   for(int i=0;i<actListData.size();i++){
    if((!actListData.get(i).equals(expListData.get(i))) && comparePdfAsImages == false){
     System.out.println("PDF FILE ACT "+actListData.get(i)+"PDF FILE EXP "+expListData.get(i));
    }

    if((!actListData.get(i).equals(expListData.get(i))) && comparePdfAsImages == true){
     PDFUtil pdfUtil = new PDFUtil();
     pdfUtil.setCompareMode(CompareMode.VISUAL_MODE);
     pdfUtil.setImageDestinationPath(System.getProperty("user.dir"));
     pdfUtil.highlightPdfDifference(true);
     pdfUtil.compare(expectedPDF, actualPDF, 0, pdfUtil.getPageCount(expectedPDF), true, true);
    }
   }
  }

  if(convertToXml == true){
   Runtime rt = Runtime.getRuntime();
   Process epr = rt.exec("cmd /c pdf2txt.py -o "+System.getProperty("user.dir")+"//"+expectedPDF+"_expected_output.xml"+" "+expectedPDF);
   Process apr = rt.exec("cmd /c pdf2txt.py -o "+System.getProperty("user.dir")+"//"+actualPDF+"_actual_output.xml"+" "+actualPDF);
  }
 }
}