Java已知图片路径下载图片到本地

public CommonResp download()
{
    FileOutputStream fos = null;
    BufferedInputStream bis = null;
    HttpURLConnection httpUrl = null;
    int size = 0;
    byte[] buf = new byte[1024];

    try
    {
        HashMap<String,String> map = new HashMap();
        map.put("白.jpg","https://images.cnblogs.com/cnblogs_com/qq1445496485/1909145/o_2103030645361045.jpg");
        map.put("橙.jpg","https://images.cnblogs.com/cnblogs_com/qq1445496485/1909145/o_210421003829%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_202104210831492.jpg");

        URL url = null;
        File file = null;
        for (Map.Entry<String, String> entry : map.entrySet()) {
            file = new File("D:/" + entry.getKey());
            url = new URL(entry.getValue());
            httpUrl = (HttpURLConnection)url.openConnection();
            httpUrl.connect();
            bis = new BufferedInputStream(httpUrl.getInputStream());
            fos = new FileOutputStream(file);
            while ((size = bis.read(buf)) != -1)
            {
                fos.write(buf, 0, size);
            }
            bis.close();
            fos.close();
            logger.info("生成图片：{}", entry.getKey());
        }

    }
    catch (Exception e)
    {
        logger.error(e.getMessage(),e);
    }
    return CommonResp.success();
}