非常好用的PDF转图片工具_pdf转图片 知乎

package com.aukey.supply.chain.utils;
 
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import javax.imageio.ImageIO;
 
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
 
import com.lowagie.text.pdf.PdfReader;
 
public class PDFToImageUtil {
 
	public static void main(String[] args) {
 
		pdf2Image("D:/test.pdf", "D:/contract","contract", 300);
 
	}
 
	/***
	 * PDF文件转PNG图片，全部页数
	 * 
	 * @param PdfFilePath
	 *            pdf完整路径
	 * @param imgFilePath
	 *            图片存放的文件夹
	 * @param packageName
	 * 			打包子包名
	 * @param dpi
	 *            dpi越大转换后越清晰，相对转换速度越慢
	 * @return
	 */
 
	public static List<String> pdf2Image(String PdfFilePath, String dstImgFolder, String packageName,int dpi) {
 
		File file = new File(PdfFilePath);
 
		PDDocument pdDocument;
		
		//存储转换后的图片地址
		List<String> imageFileUrlList=new ArrayList<String>();
		
		try {
 
			String imgPDFPath = file.getParent();
 
			/*int dot = file.getName().lastIndexOf('.');
			String imagePDFName = file.getName().substring(0, dot);*/ // 获取图片文件名
 
			String imgFolderPath = null;
 
			if (dstImgFolder.equals("")) {
 
				imgFolderPath = imgPDFPath + File.separator + packageName;// 获取图片存放的文件夹路径
 
			} else {
 
				imgFolderPath = dstImgFolder + File.separator + packageName;
 
			}
 
			if (createDirectory(imgFolderPath)) {
 
				pdDocument = PDDocument.load(file);
 
				PDFRenderer renderer = new PDFRenderer(pdDocument);
 
				/* dpi越大转换后越清晰，相对转换速度越慢 */
 
				PdfReader reader = new PdfReader(PdfFilePath);
 
				int pages = reader.getNumberOfPages();
 
				StringBuffer imgFilePath = null;
 
				for (int i = 0; i < pages; i++) {
 
					String imgFilePathPrefix = imgFolderPath + File.separator;
 
					imgFilePath = new StringBuffer();
 
					imgFilePath.append(imgFilePathPrefix);
 
					/*imgFilePath.append("_");*/
 
					imgFilePath.append(String.valueOf(i + 1));
 
					imgFilePath.append(".jpg");
 
					File dstFile = new File(imgFilePath.toString());
 
					BufferedImage image = renderer.renderImageWithDPI(i, dpi);
 
					
					ImageIO.write(image, "jpg", dstFile);
					
					//存储文件地址名 然后打包发送
					imageFileUrlList.add(imgFilePath.toString());
				}
 
				System.out.println("PDF文档转jpg图片成功！");
				
				pdDocument.close();
 
			} else {
 
				System.out.println("PDF文档转jpg图片失败：" + "创建" + imgFolderPath + "失败");
 
			}
 
		} catch (IOException e) {
 
			e.printStackTrace();
 
		}
		return imageFileUrlList;
	}
	//专门的转换PDF转换图片
	public static List<String> pdfToImage(String PdfFilePath, String dstImgFolder, String packageName,int dpi) {
 
		File file = new File(PdfFilePath);
 
		PDDocument pdDocument;
		
		//存储转换后的图片地址
		List<String> imageFileUrlList=new ArrayList<String>();
		
		try {
 
			String imgPDFPath = file.getParent();
 
			/*int dot = file.getName().lastIndexOf('.');
			String imagePDFName = file.getName().substring(0, dot);*/ // 获取图片文件名
 
			String imgFolderPath = null;
 
			if (dstImgFolder.equals("")) {
 
				imgFolderPath = imgPDFPath + File.separator + packageName;// 获取图片存放的文件夹路径
 
			} else {
 
				imgFolderPath = dstImgFolder + File.separator + packageName;
 
			}
 
			if (createDirectory(imgFolderPath)) {
 
				pdDocument = PDDocument.load(file);
 
				PDFRenderer renderer = new PDFRenderer(pdDocument);
 
				/* dpi越大转换后越清晰，相对转换速度越慢 */
 
				PdfReader reader = new PdfReader(PdfFilePath);
 
				int pages = reader.getNumberOfPages();
 
				StringBuffer imgFilePath = null;
 
				for (int i = 0; i < pages; i++) {
 
					String imgFilePathPrefix = imgFolderPath + File.separator;
 
					imgFilePath = new StringBuffer();
 
					imgFilePath.append(imgFilePathPrefix);
 
					/*imgFilePath.append("_");*/
 
					imgFilePath.append(String.valueOf(i + 1));
 
					imgFilePath.append(".jpg");
 
					File dstFile = new File(imgFilePath.toString());
 
					BufferedImage image = renderer.renderImageWithDPI(i, dpi);
 
					
					ImageIO.write(image, "jpg", dstFile);
					
					//存储文件地址名 然后打包发送
					imageFileUrlList.add(imgFilePath.toString());
				}
 
				System.out.println("PDF文档转jpg图片成功！");
				pdDocument.close();
			} else {
 
				System.out.println("PDF文档转jpg图片失败：" + "创建" + imgFolderPath + "失败");
 
			}
 
		} catch (IOException e) {
 
			e.printStackTrace();
 
		}
		return imageFileUrlList;
	}
	
	
	
	private static boolean createDirectory(String folder) {
 
		File dir = new File(folder);
 
		if (dir.exists()) {
 
			return true;
 
		} else {
 
			return dir.mkdirs();
 
		}
 
	}
 
}

附带jar包下载地址：https://download.csdn.net/download/qq_24818689/10893420