Today in this article I am going to demonstrate you how to read or extract text from pdf files using java code.
Why do I even need to read the pdf files ?
Okay, suppose you are programming a E-commerce website using java and you need to analyze Invoices of the customers, obviously the Invoices will be saved in the pdf format you need to get a token number of the customer, In that case you can use this program to find the string token.
I am going to demonstrate using the two methods
1) Using the iText Package
2) Using the apache Package
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | package com.codingsec; import java.io.IOException; //iText imports import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.parser.PdfTextExtractor; public class iTextReadDemo { public static void main(String[] args) { try { PdfReader reader = new PdfReader("c:/temp/test.pdf"); System.out.println("This PDF has "+reader.getNumberOfPages()+" pages."); String page = PdfTextExtractor.getTextFromPage(reader, 2); System.out.println("Page Content:\n\n"+page+"\n\n"); System.out.println("Is this document tampered: "+reader.isTampered()); System.out.println("Is this document encrypted: "+reader.isEncrypted()); } catch (IOException e) { e.printStackTrace(); } } } |
AND THE SECOND CODE USING APACHE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | import java.io.*; import org.apache.pdfbox.pdmodel.*; import org.apache.pdfbox.util.*; public class PDFTest { public static void main(String[] args){ PDDocument pd; BufferedWriter wr; try { File input = new File("C:\\Invoice.pdf"); // The PDF file from where you would like to extract File output = new File("C:\\SampleText.txt"); // The text file where you are going to store the extracted data pd = PDDocument.load(input); System.out.println(pd.getNumberOfPages()); System.out.println(pd.isEncrypted()); pd.save("CopyOfInvoice.pdf"); // Creates a copy called "CopyOfInvoice.pdf" PDFTextStripper stripper = new PDFTextStripper(); wr = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(output))); stripper.writeText(pd, wr); if (pd != null) { pd.close(); } // I use close() to flush the stream. wr.close(); } catch (Exception e){ e.printStackTrace(); } } } |
Take your time to comment on this article share your views.