小狼-java补零/根据网址读取文件

咱是汝的什么

于 2021-06-18 19:34:48 发布

阅读量121

点赞数 1

本文链接：https://blog.youkuaiyun.com/qq_44729800/article/details/118032579

版权

public void a() throws IOException {
    for (int i = 0; i < 9999; i++) {
        try {
            String format = String.format("%04d", Integer.valueOf(i));
            URL url = new URL("https://i.i8tq.com/alarm_icon/" + format + ".png");
            URLConnection conn = url.openConnection();
            InputStream inputStream = conn.getInputStream();
            FileOutputStream fos = new FileOutputStream("d://2//" + format + ".png");
            byte[] b = new byte[1024];
            int length;
            while ((length = inputStream.read(b)) > 0) {
                fos.write(b, 0, length);
            }
            System.out.println("第" + format + "张图片已完成");
        } catch (Exception e) {
            System.out.println("第" + i + "张图片不存在");
        }
    }
}