Leer Pdf desde Java

Vamos a utilizar la libreria PDFBox, que nos permite manejar diferntes tipos de PDF y convertir pdf a texto.

Mediante lineas de comando convertimos el pdf en un archivo de texto.

Aqui tenemos un ejemplo de una clase para Leer PDF

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.util.List;

import org.pdfbox.cos.COSDocument;
import org.pdfbox.pdfparser.

PDFParser;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.pdmodel.PDDocumentInformation;
import org.pdfbox.util.PDFTextStripper;

public class LeerPDF {

PDFParser parser;
String parsedText;
PDFTextStripper pdfStripper;
PDDocument pdDoc;
COSDocument cosDoc;
PDDocumentInformation pdDocInfo;

// PDFTextParser Constructor
public LeerPDF() {
}

// Extract text from PDF Document
public String pdftoText(String fileName) {

//System.out.println("Parsing text from PDF file " + fileName + "....");
File f = new File(fileName);

if (!f.isFile()) {
System.out.println("File " + fileName + " does not exist.");
return null;
}

try {
parser = new PDFParser(new FileInputStream(f));
} catch (Exception e) {
System.out.println("Unable to open PDF Parser.");
return null;
}

try {
parser.parse();
cosDoc = parser.getDocument();
pdfStripper = new PDFTextStripper();
pdDoc = new PDDocument(cosDoc);
parsedText = pdfStripper.getText(pdDoc);
} catch (Exception e) {
System.out.println("An exception occured in parsing the PDF Document.");
e.printStackTrace();
try {
if (cosDoc != null) cosDoc.close();
if (pdDoc != null) pdDoc.close();
} catch (Exception e1) {
e.printStackTrace();
}
return null;
}
System.out.println("Done.");
return parsedText;
}

// Write the parsed text from PDF to a file
/* void writeTexttoFile(String pdfText, String fileName) {

System.out.println("\nWriting PDF text to output text file " + fileName + "....");
try {
PrintWriter pw = new PrintWriter(fileName);
pw.print(pdfText);
pw.close();
} catch (Exception e) {
System.out.println("An exception occured in writing the pdf text to file.");
e.printStackTrace();
}
System.out.println("Done.");
}*/

// Extracts text from a PDF Document and writes it to a text file
public static void main(String args[]) {

/* if (args.length != 2) {
System.out.println("Usage: java PDFTextParser ");
System.exit(1);
}*/

LeerPDF pdfTextParserObj = new LeerPDF();
//String pdfToText = pdfTextParserObj.pdftoText(args[0]);
String pdfToText = pdfTextParserObj.pdftoText("C:/datos/Java2.pdf");
System.out.println(pdfToText);

/* if (pdfToText == null) {
System.out.println("PDF to Text Conversion failed.");
}
else {
System.out.println("\nThe text parsed from the PDF Document....\n" + pdfToText);
// pdfTextParserObj.writeTexttoFile(pdfToText, args[1]);

pdfTextParserObj.writeTexttoFile(pdfToText, "C:/datos/Java2.txt");
}*/
}
}