javaPDF转图片

佚名 6年前 (2019-05-08) 随笔 1018人围观抢沙发百度已收录

import java.io.FileNotFoundException;
import java.io.IOException;

@SpringBootApplication
@EnableScheduling
public class ApplicationProject extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication application = new SpringApplication(new Class<?>[] { ApplicationProject.class });
        application.run(args);
        pdf2Image("F:/tpl.pdf", "F:/pdf2", 300);

    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(ApplicationProject.class);
    }

    /***
     * PDF文件转PNG图片，全部页数
     *
     * @param PdfFilePath pdf完整路径
     * @param dstImgFolder 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 pdf2Image(String PdfFilePath, String dstImgFolder, int dpi) {
        File file = new File(PdfFilePath);
        PDDocument pdDocument = null;
        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 + imagePDFName;// 获取图片存放的文件夹路径
            } else {
                imgFolderPath = dstImgFolder + File.separator + imagePDFName;
            }

            if (createDirectory(imgFolderPath)) {

                try {
                    pdDocument = PDDocument.load(file);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                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("_");
                    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);
                }
                System.out.println("PDF文档转PNG图片成功！");

            } else {
                System.out.println("PDF文档转PNG图片失败：" + "创建" + imgFolderPath + "失败");
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static boolean createDirectory(String folder) {
        File dir = new File(folder);
        if (dir.exists()) {
            return true;
        } else {
            return dir.mkdirs();
        }
    }



}

我要引入一个jar包，我是用maven来管理的，maven引入的方式如下：

 1   <!-- PDF转图片 -->
 2         <dependency>
 3             <groupId>org.apache.pdfbox</groupId>
 4             <artifactId>fontbox</artifactId>
 5             <version>2.0.1</version>
 6         </dependency>
 7         <dependency>
 8             <groupId>org.apache.pdfbox</groupId>
 9             <artifactId>pdfbox</artifactId>
10             <version>2.0.1</version>
11         </dependency>