图片转pdf

/**
 * 依赖包：<dependency>
 * <groupId>org.eclipse.birt.runtime.3_7_1</groupId>
 * <artifactId>com.lowagie.text</artifactId>
 * <version>2.1.7</version>
 * </dependency>
 * <dependency>
 * <groupId>com.itextpdf</groupId>
 * <artifactId>itextpdf</artifactId>
 * <version>5.5.7</version>
 * </dependency>
 */
public class Test {

    private static final Logger LOGGER = LoggerFactory.getLogger(Test.class);

    /**
     * 多张图转为pdf
     * param imageFolderPath
     * param pdfPath
     */
    public static void toPdf(String imageFolderPath, String pdfPath) {
        try {
            long start = System.currentTimeMillis();
            ArrayList<String> list = new ArrayList<>();
            // 图片地址
            String imagePath = null;
            new File(pdfPath);
            FileOutputStream fos = new FileOutputStream(pdfPath);
            // 创建文档
            Document doc = new Document(null, 30, 30, 30, 30);
            // 写入PDF文档
            PdfWriter.getInstance(doc, fos);
            // 读取图片流
            BufferedImage img;
            // 实例化图片
            Image image;
            // 获取图片文件夹对象
            File file = new File(imageFolderPath);
            file.setReadable(true, false);
            File[] files = file.listFiles();
            // 循环获取图片文件夹内的图片
            for (File file1 : files) {
                if (file1.getName().endsWith(".png") || file1.getName().endsWith(".jpg") || file1.getName().endsWith(".gif")
                        || file1.getName().endsWith(".jpeg") || file1.getName().endsWith(".tif")) {
                    imagePath = imageFolderPath + File.separator + file1.getName();
                    list.add(file1.getName());
                    File tf = new File(imagePath);
                    // 读取图片流
                    img = ImageIO.read(tf);
                    // 根据图片大小设置文档大小
                    doc.setPageSize(new Rectangle(img.getHeight(), img.getWidth()));
                    // 实例化图片
                    image = Image.getInstance(imagePath);
                    // 添加图片到文档
                    doc.open();
                    doc.add(image);
                }
            }
            LOGGER.info("fileName is list={}", list);
            // 关闭文档
            doc.close();
            long endTime = System.currentTimeMillis();
            int time = (int) ((endTime - start) / 1000);
            LOGGER.info("用时：{}:秒！", time);
        } catch (Exception e) {
            LOGGER.error(e.getMessage());
        }
    }


    public static void main(String[] args) {
        toPdf("C:" + File.separator + "Users" + File.separator + "hp" + File.separator + "Desktop" + File.separator + "bg", "C:" + File.separator + "Users" + File.separator + "hp" + File.separator + "Desktop" + File.separator + "mypdf.pdf");
    }
}