pdf转jpg

package msdev.card;

import com.itextpdf.text.pdf.PdfReader;
import org.apache.pdfbox.pdmodel.PDdocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;

public class PDFToImgUtil {

public static void pdf2ImageDemo(File file, String dstImgFolder, int dpi) {
    PDdocument pddocument;
    try {
        String imgPDFPath = file.getParent();
        int dot = file.getName().lastIndexOf('.');
        // 获取图片文件名
        String imagePDFName = file.getName().substring(0, dot);
        String imgFolderPath = null;
        if (dstImgFolder.equals("")) {
            // 获取图片存放的文件夹路径
            imgFolderPath = imgPDFPath + File.separator + imagePDFName;
        } else {
            imgFolderPath = dstImgFolder + File.separator + imagePDFName;
        }
        if (createDirectory(imgFolderPath)) {
            pddocument = PDdocument.load(file);
            PDFRenderer renderer = new PDFRenderer(pddocument);
            StringBuffer imgFilePath = null;
            String imgFilePathPrefix = imgFolderPath
                    + File.separator + imagePDFName;
            imgFilePath = new StringBuffer();
            imgFilePath.append(imgFilePathPrefix);
            imgFilePath.append("_");
            imgFilePath.append(String.valueOf(1));
            imgFilePath.append(".png");// PNG
            File dstFile = new File(imgFilePath.toString());
            BufferedImage image = renderer.renderImageWithDPI(0, dpi);
            ImageIO.write(image, "png", dstFile);// PNG
            System.out.println("PDF文档转JPG图片成功！");
        } else {
            System.out.println("PDF文档转JPG图片失败："
                    + "创建" + imgFolderPath + "失败");
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}


public static void pdf2ImageDemo(String PdfFilePath, String dstImgFolder, int dpi) {
    File file = new File(PdfFilePath);
    PDdocument pddocument;
    try {
        String imgPDFPath = file.getParent();
        int dot = file.getName().lastIndexOf('.');
        // 获取图片文件名
        String imagePDFName = file.getName().substring(0, dot);
        String imgFolderPath = null;
        if (dstImgFolder.equals("")) {
            // 获取图片存放的文件夹路径
            imgFolderPath = imgPDFPath + File.separator + imagePDFName;
        } else {
            imgFolderPath = dstImgFolder + File.separator + imagePDFName;
        }

        if (createDirectory(imgFolderPath)) {
            pddocument = PDdocument.load(file);
            PDFRenderer renderer = new PDFRenderer(pddocument);
            PdfReader reader = new PdfReader(PdfFilePath);
            int pages = reader.getNumberOfPages();// 获取PDF页数
            System.out.println("PDF page number is:" + pages);
            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(".png");// PNG
                File dstFile = new File(imgFilePath.toString());
                BufferedImage image = renderer.renderImageWithDPI(i, dpi);
                ImageIO.write(image, "png", dstFile);// PNG
            }
            System.out.println("PDF文档转JPG图片成功！");
        } else {
            System.out.println("PDF文档转JPG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();
    }
}

}