Java 将PDF文件转换为图像
我想把PDF文档转换成图像。我用的是Ghost4j 问题:Ghost4J在运行时需要gsdll32.dll文件,我不想使用该dll文件 问题1:在ghost4j中,有没有办法在没有dll的情况下转换图像 问题2:我在PDFBox API中找到了解决方案<代码>org.apache.pdfbox.pdmodel.PDPagep 使用方法convertToImage()`将PDF页面转换为图像格式Java 将PDF文件转换为图像,java,pdf,pdf-generation,pdfbox,ghost4j,Java,Pdf,Pdf Generation,Pdfbox,Ghost4j,我想把PDF文档转换成图像。我用的是Ghost4j 问题:Ghost4J在运行时需要gsdll32.dll文件,我不想使用该dll文件 问题1:在ghost4j中,有没有办法在没有dll的情况下转换图像 问题2:我在PDFBox API中找到了解决方案org.apache.pdfbox.pdmodel.PDPagep 使用方法convertToImage()`将PDF页面转换为图像格式 PDDocument doc = PDDocument.load(new File("/document.pd
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();
PDDocument doc=PDDocument.load(新文件(“/document.pdf”);
Listpages=doc.getDocumentCatalog().getAllPages();
PDPage=pages.get(0);
BuffereImage image=page.convertToImage();
File outputfile=新文件(“/image.png”);
写入(图像,“png”,输出文件);
doc.close();
我只有PDF文档上的文本。当我运行此代码时,我有一个例外:
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
2013年8月12日下午6:00:24 org.apache.pdfbox.util.PDFStreamEngine processOperator
信息:不支持/禁用的操作:BDC
线程“main”java.lang.ExceptionInInitializeError中出现异常
位于org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getawtFont(PDTrueTypeFont.java:481)
位于org.apache.pdfbox.pdmodel.font.PDSimpleFont.drawString(PDSimpleFont.java:109)
位于org.apache.pdfbox.pdfviewer.PageDrawer.processTextPosition(PageDrawer.java:235)
位于org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:496)
位于org.apache.pdfbox.util.operator.ShowTextGlyph.process(ShowTextGlyph.java:62)
位于org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:554)
位于org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
位于org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
位于org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
位于org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:125)
位于org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:781)
位于org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:712)
位于ge.eid.esignature.adessa.pades.sign.PDFtoImage.main(PDFtoImage.java:25)
原因:java.lang.IllegalArgumentException
位于java.nio.Buffer.position(Buffer.java:216)
在sun.font.TrueTypeFont.lookupName(TrueTypeFont.java:1153)中
位于sun.font.TrueTypeFont.getPostscriptName(TrueTypeFont.java:1205)
位于java.awt.Font.getPSName(Font.java:1156)
位于org.apache.pdfbox.pdmodel.font.FontManager.loadFonts(FontManager.java:101)
位于org.apache.pdfbox.pdmodel.font.FontManager.(FontManager.java:53)
... 还有13个
绕过PDFBox是避免本机绑定的好方法。
尝试使用PDFBox中的PDFImageWriter,我在几行中使用了它,效果非常好。
您必须提取PDFDocument并使用writer
PDFImageWriter.write(doc, "png", null, , Integer.MAX_VALUE, "picture");
适用于所有页面
PDFImageWriter.write(doc, "png", null, 0, 0, "picture");
见:
您可能试图转换损坏的PDF文件。当PDF文件包含JPXEncoded流时,我也会遇到同样的错误。您可以尝试使用非序列LParser来避免某些PDF文件出现错误(增量更新): PDDocument doc=PDDocument.loadNonSeq(新文件(“/document.pdf”) 您可以轻松地将文件页转换为图像格式
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();
使用pdf框将所有pdf页面转换为Java中的图像格式
针对Apache PDFBox 1.8的解决方案。*版本:
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
package com.pdf.pdfbox.examples;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
/**
*
* @author venkataudaykiranp
*
* @version 2.0.16(Apache PDFBox version support)
*
*/
public class ConvertPDFPagesToImages {
public static void main(String[] args) {
try {
String sourceDir = "C:\\Users\\venkataudaykiranp\\Downloads\\04-Request-Headers.pdf"; // Pdf files are read from this folder
String destinationDir = "C:\\Users\\venkataudaykiranp\\Downloads\\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 Location: "+ destinationFile.getAbsolutePath());
PDDocument document = PDDocument.load(sourceFile);
PDFRenderer pdfRenderer = new PDFRenderer(document);
int numberOfPages = document.getNumberOfPages();
System.out.println("Total files to be converting -> "+ numberOfPages);
String fileName = sourceFile.getName().replace(".pdf", "");
String fileExtension= "png";
/*
* 600 dpi give good image clarity but size of each image is 2x times of 300 dpi.
* Ex: 1. For 300dpi 04-Request-Headers_2.png expected size is 797 KB
* 2. For 600dpi 04-Request-Headers_2.png expected size is 2.42 MB
*/
int dpi = 300;// use less dpi for to save more space in harddisk. For professional usage you can use more than 300dpi
for (int i = 0; i < numberOfPages; ++i) {
File outPutFile = new File(destinationDir + fileName +"_"+ (i+1) +"."+ fileExtension);
BufferedImage bImage = pdfRenderer.renderImageWithDPI(i, dpi, ImageType.RGB);
ImageIO.write(bImage, fileExtension, outPutFile);
}
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();
}
}
}
需要罐子吗
还是maven依赖
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>1.8.3</version>
</dependency>
控制台输出:
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
package com.pdf.pdfbox.examples;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
/**
*
* @author venkataudaykiranp
*
* @version 2.0.16(Apache PDFBox version support)
*
*/
public class ConvertPDFPagesToImages {
public static void main(String[] args) {
try {
String sourceDir = "C:\\Users\\venkataudaykiranp\\Downloads\\04-Request-Headers.pdf"; // Pdf files are read from this folder
String destinationDir = "C:\\Users\\venkataudaykiranp\\Downloads\\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 Location: "+ destinationFile.getAbsolutePath());
PDDocument document = PDDocument.load(sourceFile);
PDFRenderer pdfRenderer = new PDFRenderer(document);
int numberOfPages = document.getNumberOfPages();
System.out.println("Total files to be converting -> "+ numberOfPages);
String fileName = sourceFile.getName().replace(".pdf", "");
String fileExtension= "png";
/*
* 600 dpi give good image clarity but size of each image is 2x times of 300 dpi.
* Ex: 1. For 300dpi 04-Request-Headers_2.png expected size is 797 KB
* 2. For 600dpi 04-Request-Headers_2.png expected size is 2.42 MB
*/
int dpi = 300;// use less dpi for to save more space in harddisk. For professional usage you can use more than 300dpi
for (int i = 0; i < numberOfPages; ++i) {
File outPutFile = new File(destinationDir + fileName +"_"+ (i+1) +"."+ fileExtension);
BufferedImage bImage = pdfRenderer.renderImageWithDPI(i, dpi, ImageType.RGB);
ImageIO.write(bImage, fileExtension, outPutFile);
}
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();
}
}
}
Apache PDFBox 2.0解决方案。*版本:
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
package com.pdf.pdfbox.examples;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
/**
*
* @author venkataudaykiranp
*
* @version 2.0.16(Apache PDFBox version support)
*
*/
public class ConvertPDFPagesToImages {
public static void main(String[] args) {
try {
String sourceDir = "C:\\Users\\venkataudaykiranp\\Downloads\\04-Request-Headers.pdf"; // Pdf files are read from this folder
String destinationDir = "C:\\Users\\venkataudaykiranp\\Downloads\\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 Location: "+ destinationFile.getAbsolutePath());
PDDocument document = PDDocument.load(sourceFile);
PDFRenderer pdfRenderer = new PDFRenderer(document);
int numberOfPages = document.getNumberOfPages();
System.out.println("Total files to be converting -> "+ numberOfPages);
String fileName = sourceFile.getName().replace(".pdf", "");
String fileExtension= "png";
/*
* 600 dpi give good image clarity but size of each image is 2x times of 300 dpi.
* Ex: 1. For 300dpi 04-Request-Headers_2.png expected size is 797 KB
* 2. For 600dpi 04-Request-Headers_2.png expected size is 2.42 MB
*/
int dpi = 300;// use less dpi for to save more space in harddisk. For professional usage you can use more than 300dpi
for (int i = 0; i < numberOfPages; ++i) {
File outPutFile = new File(destinationDir + fileName +"_"+ (i+1) +"."+ fileExtension);
BufferedImage bImage = pdfRenderer.renderImageWithDPI(i, dpi, ImageType.RGB);
ImageIO.write(bImage, fileExtension, outPutFile);
}
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();
}
}
}
所需的罐子
或者从pom.xml依赖项
<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox -->
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/fontbox -->
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>fontbox</artifactId>
<version>2.0.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
org.apache.pdfbox
pdfbox
2.0.16
org.apache.pdfbox
方盒
2.0.16
公用记录
公用记录
1.2
2.0.16版本的解决方案:
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
package com.pdf.pdfbox.examples;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
/**
*
* @author venkataudaykiranp
*
* @version 2.0.16(Apache PDFBox version support)
*
*/
public class ConvertPDFPagesToImages {
public static void main(String[] args) {
try {
String sourceDir = "C:\\Users\\venkataudaykiranp\\Downloads\\04-Request-Headers.pdf"; // Pdf files are read from this folder
String destinationDir = "C:\\Users\\venkataudaykiranp\\Downloads\\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 Location: "+ destinationFile.getAbsolutePath());
PDDocument document = PDDocument.load(sourceFile);
PDFRenderer pdfRenderer = new PDFRenderer(document);
int numberOfPages = document.getNumberOfPages();
System.out.println("Total files to be converting -> "+ numberOfPages);
String fileName = sourceFile.getName().replace(".pdf", "");
String fileExtension= "png";
/*
* 600 dpi give good image clarity but size of each image is 2x times of 300 dpi.
* Ex: 1. For 300dpi 04-Request-Headers_2.png expected size is 797 KB
* 2. For 600dpi 04-Request-Headers_2.png expected size is 2.42 MB
*/
int dpi = 300;// use less dpi for to save more space in harddisk. For professional usage you can use more than 300dpi
for (int i = 0; i < numberOfPages; ++i) {
File outPutFile = new File(destinationDir + fileName +"_"+ (i+1) +"."+ fileExtension);
BufferedImage bImage = pdfRenderer.renderImageWithDPI(i, dpi, ImageType.RGB);
ImageIO.write(bImage, fileExtension, outPutFile);
}
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();
}
}
}
package com.pdf.pdfbox.examples;
导入java.awt.image.buffereImage;
导入java.io.File;
导入javax.imageio.imageio;
导入org.apache.pdfbox.pdmodel.PDDocument;
导入org.apache.pdfbox.rendering.ImageType;
导入org.apache.pdfbox.rendering.PDFRenderer;
/**
*
*@venkataudaykiranp作者
*
*@version 2.0.16(Apache PDFBox版本支持)
*
*/
公共类ConvertPDFPagesToImages{
公共静态void main(字符串[]args){
试一试{
String sourceDir=“C:\\Users\\venkataudaykiranp\\Downloads\\04 Request Headers.pdf”;//从该文件夹读取pdf文件
String destinationDir=“C:\\Users\\venkataudaykiranp\\Downloads\\Converted_PdfFiles_to_Image/”;//从pdf文档转换的图像保存在此处
文件sourceFile=新文件(sourceDir);
文件destinationFile=新文件(destinationDir);
如果(!destinationFile.exists()){
destinationFile.mkdir();
System.out.println(“创建的文件夹->”+destinationFile.getAbsolutePath());
}
if(sourceFile.exists()){
System.out.println(“复制到文件夹位置的图像:”+destinationFile.getAbsolutePath());
PDDocument=PDDocument.load(sourceFile);
PDFRenderer PDFRenderer=新的PDFRenderer(文件);
int numberOfPages=document.getNumberOfPages();
System.out.println(“要转换的文件总数->”+页数);
字符串文件名=sourceFile.getName().replace(“.pdf”,”);
字符串fileExtension=“png”;
/*
*600 dpi可以提供良好的图像清晰度,但每个图像的大小是300 dpi的2倍。
*例:1.对于300dpi 04-Request-Headers_2.png,预期大小为797KB
*2.对于600dpi 04-Request-Headers_2.png,预期大小为2.42 MB
*/
int dpi=300;//使用更少的dpi来节省更多硬盘空间。对于专业用途,可以使用超过300dpi的dpi
对于(int i=0