java - Convertir un archivo PDF a imagen
pdf-generation pdfbox (7)
La forma de usar PDFBox es una buena manera de evitar los enlaces nativos. Intente usar el PDFImageWriter del PDFBox, hice lo mismo en unas pocas líneas y funcionó perfectamente. Tienes que extraer el PDFDocument y usar el escritor con él.
PDFImageWriter.write(doc, "png", null, , Integer.MAX_VALUE, "picture");
Para todas las páginas.
PDFImageWriter.write(doc, "png", null, 0, 0, "picture");
Quería convertir documento PDF en imagen. Yo estaba usando Ghost4j.
Problema: Ghost4J necesita el archivo gsdll32.dll en tiempo de ejecución, y no quiero usar el archivo dll.
Pregunta 1: ¿hay alguna manera, en ghost4j para convertir la imagen sin la dll?
Pregunta 2: Encontré la solución en la API de PDFBox. org.apache.pdfbox.pdmodel.PDPagep have method convertToImage () `que convierte la página PDF al formato de imagen.
PDDocument doc = PDDocument.load(new File("/document.pdf"));
List<PDPage>pages = doc.getDocumentCatalog().getAllPages();
PDPage page = pages.get(0);
BufferedImage image =page.convertToImage();
File outputfile = new File("/image.png");
ImageIO.write(image, "png", outputfile);
doc.close();
Sólo tengo texto en el documento PDF. y tengo esa excepción cuando ejecuto este código:
Aug 12, 2013 6:00:24 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: BDC
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getawtFont(PDTrueTypeFont.java:481)
at org.apache.pdfbox.pdmodel.font.PDSimpleFont.drawString(PDSimpleFont.java:109)
at org.apache.pdfbox.pdfviewer.PageDrawer.processTextPosition(PageDrawer.java:235)
at org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:496)
at org.apache.pdfbox.util.operator.ShowTextGlyph.process(ShowTextGlyph.java:62)
at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:554)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:125)
at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:781)
at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:712)
at ge.eid.esignature.adessa.pades.sign.PDFtoImage.main(PDFtoImage.java:25)
Caused by: java.lang.IllegalArgumentException
at java.nio.Buffer.position(Buffer.java:216)
at sun.font.TrueTypeFont.lookupName(TrueTypeFont.java:1153)
at sun.font.TrueTypeFont.getPostscriptName(TrueTypeFont.java:1205)
at java.awt.Font.getPSName(Font.java:1156)
at org.apache.pdfbox.pdmodel.font.FontManager.loadFonts(FontManager.java:101)
at org.apache.pdfbox.pdmodel.font.FontManager.<clinit>(FontManager.java:53)
... 13 more
Por el error:
org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: operación no admitida / deshabilitada
Debe incluir el tarro de fontbox-1.7.1 en la ruta de clase, a excepción del jar de Apache pdfbox, que solucionará su problema ya que PDFBox utiliza de forma interna fontbox-1.7.1
Probablemente haya intentado convertir un archivo PDF dañado. Tengo los mismos errores cuando el archivo PDF contiene secuencias JPXEncoded.
Puede convertir fácilmente PDF en imagen usando PDFBox . El método renderImageWithDPI de la clase PDFRenderer de PDFBox se utiliza para convertir pdf a imagen.
PDDocument doc=PDDocument.load(new File("filepath/sample.pdf"));
PDFRenderer pdfRenderer = new PDFRenderer(doc);
BufferedImage bffim = pdfRenderer.renderImageWithDPI(pageNo, 300, ImageType.RGB);
String fileName = "image-" + page + ".png";
ImageIOUtil.writeImage(bim, fileName, 300);
Puede convertir fácilmente las páginas del archivo 04-Request-Headers.pdf al formato de imagen.
Convierta todas las páginas pdf en formato de imagen en Java usando PDF Box.
Jar requerido pdfbox-1.8.3.jar
o la dependencia maven
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>1.8.3</version>
</dependency>
Aquí está la solución:
package com.pdf.pdfbox.examples;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.List;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
@SuppressWarnings("unchecked")
public class ConvertPDFPagesToImages {
public static void main(String[] args) {
try {
String sourceDir = "C:/Documents/04-Request-Headers.pdf"; // Pdf files are read from this folder
String destinationDir = "C:/Documents/Converted_PdfFiles_to_Image/"; // converted images from pdf document are saved here
File sourceFile = new File(sourceDir);
File destinationFile = new File(destinationDir);
if (!destinationFile.exists()) {
destinationFile.mkdir();
System.out.println("Folder Created -> "+ destinationFile.getAbsolutePath());
}
if (sourceFile.exists()) {
System.out.println("Images copied to Folder: "+ destinationFile.getName());
PDDocument document = PDDocument.load(sourceDir);
List<PDPage> list = document.getDocumentCatalog().getAllPages();
System.out.println("Total files to be converted -> "+ list.size());
String fileName = sourceFile.getName().replace(".pdf", "");
int pageNumber = 1;
for (PDPage page : list) {
BufferedImage image = page.convertToImage();
File outputfile = new File(destinationDir + fileName +"_"+ pageNumber +".png");
System.out.println("Image Created -> "+ outputfile.getName());
ImageIO.write(image, "png", outputfile);
pageNumber++;
}
document.close();
System.out.println("Converted Images are saved at -> "+ destinationFile.getAbsolutePath());
} else {
System.err.println(sourceFile.getName() +" File not exists");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Posibles conversiones de imagen a formato jpg, jpeg, png, bmp, gif .
Nota: mencioné los formatos de imagen utilizados principalmente.
ImageIO.write(image , "jpg", new File( destinationDir +fileName+"_"+pageNumber+".jpg" ));
ImageIO.write(image , "jpeg", new File( destinationDir +fileName+"_"+pageNumber+".jpeg" ));
ImageIO.write(image , "png", new File( destinationDir +fileName+"_"+pageNumber+".png" ));
ImageIO.write(image , "bmp", new File( destinationDir +fileName+"_"+pageNumber+".bmp" ));
ImageIO.write(image , "gif", new File( destinationDir +fileName+"_"+pageNumber+".gif" ));
Salida de consola:
Images copied to Folder: Converted_PdfFiles_to_Image
Total files to be converted -> 13
Aug 06, 2014 1:35:49 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_1.png
Aug 06, 2014 1:35:50 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_2.png
Aug 06, 2014 1:35:51 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_3.png
Aug 06, 2014 1:35:51 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_4.png
Aug 06, 2014 1:35:52 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_5.png
Aug 06, 2014 1:35:52 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_6.png
Aug 06, 2014 1:35:53 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_7.png
Aug 06, 2014 1:35:53 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_8.png
Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_9.png
Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_10.png
Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_11.png
Aug 06, 2014 1:35:55 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_12.png
Aug 06, 2014 1:35:55 PM org.apache.pdfbox.util.PDFStreamEngine processOperator
INFO: unsupported/disabled operation: i
Image Created -> 04-Request-Headers_13.png
Converted Images are saved at -> C:/Documents/Converted_PdfFiles_to_Image
Puede intentar usar NonSequentialParser para evitar errores con algunos archivos PDF (con actualizaciones incrementales):
PDDocument doc = PDDocument.loadNonSeq (nuevo archivo ("/ document.pdf"));
try {
PDDocument document = PDDocument.load(PdfInfo.getPDFWAY());
if (document.isEncrypted()) {
document.decrypt(PdfInfo.getPASSWORD());
}
if ("bilevel".equalsIgnoreCase(PdfInfo.getCOLOR())) {
PdfInfo.setIMAGETYPE( BufferedImage.TYPE_BYTE_BINARY);
} else if ("indexed".equalsIgnoreCase(PdfInfo.getCOLOR())) {
PdfInfo.setIMAGETYPE(BufferedImage.TYPE_BYTE_INDEXED);
} else if ("gray".equalsIgnoreCase(PdfInfo.getCOLOR())) {
PdfInfo.setIMAGETYPE(BufferedImage.TYPE_BYTE_GRAY);
} else if ("rgb".equalsIgnoreCase(PdfInfo.getCOLOR())) {
PdfInfo.setIMAGETYPE(BufferedImage.TYPE_INT_RGB);
} else if ("rgba".equalsIgnoreCase(PdfInfo.getCOLOR())) {
PdfInfo.setIMAGETYPE(BufferedImage.TYPE_INT_ARGB);
} else {
System.exit(2);
}
PDFImageWriter imageWriter = new PDFImageWriter();
boolean success = imageWriter.writeImage(document, PdfInfo.getIMAGE_FORMAT(),PdfInfo.getPASSWORD(),
PdfInfo.getSTART_PAGE(),PdfInfo.getEND_PAGE(),PdfInfo.getOUTPUT_PREFIX(),PdfInfo.getIMAGETYPE(),PdfInfo.getRESOLUTION());
if (!success) {
System.exit(1);
}
document.close();
} catch (IOException | CryptographyException | InvalidPasswordException ex) {
Logger.getLogger(PdfToImae.class.getName()).log(Level.SEVERE, null, ex);
}
public class PdfInfo {
private static String PDFWAY;
private static String OUTPUT_PREFIX;
private static String PASSWORD;
private static int START_PAGE=1;
private static int END_PAGE=Integer.MAX_VALUE;
private static String IMAGE_FORMAT="jpg";
private static String COLOR="rgb";
private static int RESOLUTION=256;
private static int IMAGETYPE=24;
private static String filename;
private static String filePath="";
}