java PDF转jpg

最近需要用到pdf转图片，发现不是需要花钱就是有水印限制，不是很好，自己做了个小程序，满足大家的需求：

maven：

<dependencies><dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.5</version></dependency><dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox-tools</artifactId><version>2.0.5</version></dependency><dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk16</artifactId><version>1.46</version></dependency></dependencies>

code：

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.tools.imageio.ImageIOUtil;import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Iterator;/*** Created by Administrator on 2019-02-28.*/
public class PDF2IMG {private static final String PASSWORD = "-password";private static final String START_PAGE = "-startPage";private static final String END_PAGE = "-endPage";private static final String PAGE = "-page";private static final String IMAGE_TYPE = "-imageType";private static final String FORMAT = "-format";private static final String OUTPUT_PREFIX = "-outputPrefix";private static final String PREFIX = "-prefix";private static final String COLOR = "-color";private static final String RESOLUTION = "-resolution";private static final String DPI = "-dpi";private static final String CROPBOX = "-cropbox";private static final String TIME = "-time";public static void main(String[] args) throws IOException {System.setProperty("apple.awt.UIElement", "true");String password = "";String pdfFile = getFile().getPath();String outputFilePath="D:\\XS\\";String outputPrefix = "XSPdfTools";String imageFormat = "jpg";int startPage = 1;int endPage = 2147483647;String color = "rgb";float cropBoxLowerLeftX = 0.0F;float cropBoxLowerLeftY = 0.0F;float cropBoxUpperRightX = 0.0F;float cropBoxUpperRightY = 0.0F;boolean showTime = false;int dpi;try {dpi = Toolkit.getDefaultToolkit().getScreenResolution();} catch (HeadlessException var28) {dpi = 96;}for(int document = 0; document < args.length; ++document) {if(args[document].equals("-password")) {++document;if(document >= args.length) {usage();}password = args[document];} else if(args[document].equals("-startPage")) {++document;if(document >= args.length) {usage();}startPage = Integer.parseInt(args[document]);} else if(args[document].equals("-endPage")) {++document;if(document >= args.length) {usage();}endPage = Integer.parseInt(args[document]);} else if(args[document].equals("-page")) {++document;if(document >= args.length) {usage();}startPage = Integer.parseInt(args[document]);endPage = Integer.parseInt(args[document]);} else if(!args[document].equals("-imageType") && !args[document].equals("-format")) {if(!args[document].equals("-outputPrefix") && !args[document].equals("-prefix")) {if(args[document].equals("-color")) {++document;color = args[document];} else if(!args[document].equals("-resolution") && !args[document].equals("-dpi")) {if(args[document].equals("-cropbox")) {++document;cropBoxLowerLeftX = Float.valueOf(args[document]).floatValue();++document;cropBoxLowerLeftY = Float.valueOf(args[document]).floatValue();++document;cropBoxUpperRightX = Float.valueOf(args[document]).floatValue();++document;cropBoxUpperRightY = Float.valueOf(args[document]).floatValue();} else if(args[document].equals("-time")) {showTime = true;} else if(pdfFile == null) {pdfFile = args[document];}} else {++document;dpi = Integer.parseInt(args[document]);}} else {++document;outputPrefix = args[document];}} else {++document;imageFormat = args[document];}}if(pdfFile == null) {usage();} else {if(outputPrefix == null) {outputPrefix = pdfFile.substring(0, pdfFile.lastIndexOf(46));}PDDocument var30 = null;try {var30 = PDDocument.load(new File(pdfFile), password);ImageType imageType = null;if("bilevel".equalsIgnoreCase(color)) {imageType = ImageType.BINARY;} else if("gray".equalsIgnoreCase(color)) {imageType = ImageType.GRAY;} else if("rgb".equalsIgnoreCase(color)) {imageType = ImageType.RGB;} else if("rgba".equalsIgnoreCase(color)) {imageType = ImageType.ARGB;}if(imageType == null) {System.err.println("Error: Invalid color.");System.exit(2);}if(cropBoxLowerLeftX != 0.0F || cropBoxLowerLeftY != 0.0F || cropBoxUpperRightX != 0.0F || cropBoxUpperRightY != 0.0F) {changeCropBox(var30, cropBoxLowerLeftX, cropBoxLowerLeftY, cropBoxUpperRightX, cropBoxUpperRightY);}long startTime = System.nanoTime();boolean success = true;endPage = Math.min(endPage, var30.getNumberOfPages());PDFRenderer renderer = new PDFRenderer(var30);for(int endTime = startPage - 1; endTime < endPage; ++endTime) {BufferedImage image = renderer.renderImageWithDPI(endTime, (float)dpi, imageType);String duration = outputPrefix + (endTime + 1) + "." + imageFormat;success &= ImageIOUtil.writeImage(image, duration,dpi);}long var31 = System.nanoTime();long var32 = var31 - startTime;int count = 1 + endPage - startPage;if(showTime) {System.err.printf("Rendered %d page%s in %dms\n", new Object[]{Integer.valueOf(count), count == 1?"":"s", Long.valueOf(var32 / 1000000L)});}if(!success) {System.err.println("Error: no writer found for image format \'" + imageFormat + "\'");System.exit(1);}} catch(Exception ex){ex.printStackTrace();}finally {if(var30 != null) {var30.close();}}System.out.println("转换完成");}}private static void usage() {String message = "Usage: java -jar pdfbox-app-x.y.z.jar PDFToImage [options] <inputfile>\n\nOptions:\n  -password  <password>            : Password to decrypt document\n  -format <string>                 : Image format: " + getImageFormats() + "\n" + "  -prefix <string>                 : Filename prefix for image files\n" + "  -page <number>                   : The only page to extract (1-based)\n" + "  -startPage <int>                 : The first page to start extraction (1-based)\n" + "  -endPage <int>                   : The last page to extract(inclusive)\n" + "  -color <int>                     : The color depth (valid: bilevel, gray, rgb, rgba)\n" + "  -dpi <int>                       : The DPI of the output image\n" + "  -cropbox <int> <int> <int> <int> : The page area to export\n" + "  -time                            : Prints timing information to stdout\n" + "  <inputfile>                      : The PDF document to use\n";System.err.println(message);System.exit(1);}private static String getImageFormats() {StringBuilder retval = new StringBuilder();String[] formats = ImageIO.getReaderFormatNames();for(int i = 0; i < formats.length; ++i) {if(formats[i].equalsIgnoreCase(formats[i])) {retval.append(formats[i]);if(i + 1 < formats.length) {retval.append(", ");}}}return retval.toString();}private static void changeCropBox(PDDocument document, float a, float b, float c, float d) {Iterator i$ = document.getPages().iterator();while(i$.hasNext()) {PDPage page = (PDPage)i$.next();System.out.println("resizing page");PDRectangle rectangle = new PDRectangle();rectangle.setLowerLeftX(a);rectangle.setLowerLeftY(b);rectangle.setUpperRightX(c);rectangle.setUpperRightY(d);page.setCropBox(rectangle);}}public static File getFile(){JFileChooser jfc=new JFileChooser(); //设置当前路径为桌面路径,否则将我的文档作为默认路径FileSystemView fsv = FileSystemView .getFileSystemView();jfc.setCurrentDirectory(fsv.getHomeDirectory());//JFileChooser.FILES_AND_DIRECTORIES 选择路径和文件jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );//弹出的提示框的标题jfc.showDialog(new JLabel(), "确定");//用户选择的路径或文件File file=jfc.getSelectedFile();return file;}}

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