Windows平台JAVA将PDF转换成PNG图片

爱被打了一巴掌 2023-10-18 13:42 133阅读 0赞

引用的jar有：core-renderer.jar  
fontbox-2.0.13.jar  
pdfbox-2.0.13.jar  
iText-2.0.8.jar  
commons-logging-1.2.jar

工具类：

import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    
    import javax.imageio.ImageIO;
    
    import org.apache.log4j.Logger;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.rendering.PDFRenderer;
    
    import com.lowagie.text.pdf.PdfReader;
    
    public class PDFToIMGUtil {
    	
    	private static Logger logger = Logger.getLogger(PDFToIMGUtil.class);
    			
    	public static void main(String[] args) {
    		pdf2Png("E:\\ECG\\ANSI\\20180511115333.pdf", "E:\\ECG\\ANSI\\", 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 dpi dpi越大转换后越清晰，相对转换速度越慢
    	 * @return
    	 */
    	public static void pdf2Png(String PdfFilePath, String imgFolderPath, int dpi) {
    		File file = new File(PdfFilePath);
    		PDDocument pdDocument;
    		try {   
    				int dot = file.getName().lastIndexOf('.');
    				String imagePDFName = file.getName().substring(0, dot); // 获取图片文件名
    				imgFolderPath =file.getParent();;
    				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 + imagePDFName;
    				imgFilePath = new StringBuffer();
    				imgFilePath.append(imgFilePathPrefix);
    				imgFilePath.append(".png");
    				File dstFile = new File(imgFilePath.toString());
    				BufferedImage image = renderer.renderImageWithDPI(i, dpi);
    				ImageIO.write(image, "png", dstFile);
    			}
    				logger.info("PDF文档转PNG图片成功！");
     
    		} catch (IOException e) {
    			logger.error("PDF文档转PNG图片的异常："+e.getMessage());
    		}
    	}