使用pdfbox将pdf转换成图片

本文主要是介绍使用pdfbox将pdf转换成图片，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

导入pom文件

 		<dependency><groupId>org.apache.pdfbox</groupId><artifactId>fontbox</artifactId><version>2.0.22</version></dependency><dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.31</version><!--3.0及以上没有load方法，PDDocument.load(file);--></dependency><dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.2</version></dependency><dependency><groupId>net.sf.cssbox</groupId><artifactId>pdf2dom</artifactId><version>2.0.3</version></dependency><dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox-tools</artifactId><version>2.0.22</version></dependency><dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.10.1</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.2</version><scope>test</scope></dependency><dependency><groupId>com.alibaba.fastjson2</groupId><artifactId>fastjson2</artifactId><version>2.0.49</version></dependency>

整个pdf转换成图片

package pdfToPng;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;public class Pdf2Png {/*** 使用pdfbox将整个pdf转换成图片* 多页pdf会生成多页的图片，后缀会生成图片的位置序号** @param fileAddress 文件地址 如:C:\\Users\\user\\Desktop\\test* @param filename    PDF文件名不带后缀名* @param type        图片类型 png和jpg*/public static void pdf2png(String fileAddress, String filename, String type) {long startTime = System.currentTimeMillis();// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接File file = new File(fileAddress + "\\" + filename + ".pdf");try {// 写入文件PDDocument doc = PDDocument.load(file);PDFRenderer renderer = new PDFRenderer(doc);int pageCount = doc.getNumberOfPages();for (int i = 0; i < pageCount; i++) {// dpi为144，越高越清晰，转换越慢  Windows native DPIBufferedImage image = renderer.renderImageWithDPI(i, 144);// 将图片写出到该路径下ImageIO.write(image, type, new File(fileAddress + "\\" + filename + "_" + (i + 1) + "." + type));}long endTime = System.currentTimeMillis();System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒");} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {pdf2png("C:\\Users\\MES\\Desktop\\test1", "1", "png");}
}

自由确定起始页和终止页

package pdfToPng;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;public class Pdf3Png {/*** 自由确定起始页和终止页** @param fileAddress  文件地址 如:C:\\Users\\user\\Desktop\\test* @param filename     PDF文件名不带后缀名* @param indexOfStart 开始页  开始转换的页码，从0开始* @param indexOfEnd   结束页  停止转换的页码，-1为全部* @param type         图片类型 png 和jpg*/public static void pdf3png(String fileAddress, String filename, int indexOfStart, int indexOfEnd, String type) {long startTime = System.currentTimeMillis();// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接File file = new File(fileAddress + "\\" + filename + ".pdf");try {PDDocument doc = PDDocument.load(file);PDFRenderer renderer = new PDFRenderer(doc);int pageCount = doc.getNumberOfPages();for (int i = indexOfStart; i < indexOfEnd; i++) {// dpi为144，越高越清晰，转换越慢BufferedImage image = renderer.renderImageWithDPI(i, 144);// 将图片写出到该路径下ImageIO.write(image, type, new File(fileAddress + "\\" + filename + "_" + (i + 1) + "." + type));}long endTime = System.currentTimeMillis();System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒");} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {pdf3png("C:\\Users\\MES\\Desktop\\", "1", 1, 1, "png");}}

使用文件流整个pdf转换成图片

package pdfToPng;import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.*;public class Pdf4Png {/*** 使用文件流整个pdf转换成图片** @param fileAddress 文件地址 如:C:\\Users\\user\\Desktop\\test* @param filename    PDF文件名不带后缀名* @param type        图片类型 png 、jpg*/public static void pdfToImage(String fileAddress, String filename, String type) {long startTime = System.currentTimeMillis();List<Map<String, String>> list = new ArrayList<>();Map<String, String> resultMap = null;PDDocument pdDocument = null;String fileName = null;String imgPath = null;try {// 将文件地址和文件名拼接成路径 注意：线上环境不能使用\\拼接File FilePath = new File(fileAddress + "\\" + filename + ".pdf");// 文件流FileInputStream inputStream = new FileInputStream(FilePath);int dpi = 296;pdDocument = PDDocument.load(inputStream);PDFRenderer renderer = new PDFRenderer(pdDocument);int pageCount = pdDocument.getNumberOfPages();/* dpi越大转换后越清晰，相对转换速度越慢 */for (int i = 0; i < pageCount; i++) {resultMap = new HashMap<>();fileName = filename + "_" + (i + 1) + "." + type;imgPath = fileAddress + "\\" + fileName;BufferedImage image = renderer.renderImageWithDPI(i, dpi);ImageIO.write(image, type, new File(imgPath));resultMap.put("fileName", fileName);resultMap.put("filePath", imgPath); // 图片路径list.add(resultMap);}long endTime = System.currentTimeMillis();System.out.println("共耗时：" + ((endTime - startTime) / 1000.0) + "秒");  //转化用时} catch (Exception e) {e.printStackTrace();} finally {try {// 这里需要关闭PDDocument，不然如果想要删除pdf文件时会提示文件正在使用，无法删除的情况pdDocument.close();} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) throws FileNotFoundException {pdfToImage("C:\\Users\\MES\\Desktop\\", "1", "png");}
}