PDF文件转jpg格式图片

public static void pdfToJpg(String filepath) throws IOException{
        File file = new File(filepath);
        // 加载解析PDF文件
        PDDocument doc = PDDocument.load(file);
        PDFRenderer pdfRenderer = new PDFRenderer(doc);
        PDPageTree pages = doc.getPages();
        int pageCount = pages.getCount();
        for (int i = 0; i < pageCount; i++) {
            BufferedImage bim = pdfRenderer.renderImageWithDPI(i, 200);
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            ImageIO.write(bim, "jpg", os);
            byte[] datas = os.toByteArray();
            //jpg文件转出路径
            FileOutputStream fs = new FileOutputStream("e:/jpg/" + i + ".jpg");
            fs.write(datas);
            fs.close();
        }
    }

　　　　本方法的实现需要用到  pdfbox-2.0.15.jar