根据图片URL地址下载到本地

public static void main(String[] args) {
    String replace = "https://betapic.uhomecp.com/service/2020/12/09/843/202012091938511177_734_743.JPEG";
    String tempDirectoryPath = "/home/si/apache-tomcat-8.0.32/webapps/tempPath/";
    String[] split = replace.split("/");
    try {
        URL url = new URL(replace);
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
        InputStream inputStream = conn.getInputStream();
        File file = new File( tempDirectoryPath+"/"+split[split.length-1]);
        System.out.println(file);
        FileItemFactory factory = new DiskFileItemFactory(16, null);//image/jpeg:jpg
        FileItem item=factory.createItem(file.getName(),"text/plain",true,file.getName());
        int bytesRead = 0;
        byte[] buffer1 = new byte[8192];
        // 下载文件到一个指定地方
        FileUtils.copyURLToFile(url, file);
        FileInputStream fis = new FileInputStream(file);
        OutputStream os = item.getOutputStream();
        while ((bytesRead = fis.read(buffer1, 0, 8192)) != -1) {
            os.write(buffer1, 0, bytesRead);
        }
        MultipartFile multipartFile = new CommonsMultipartFile(item);
        System.out.println("4.multipartFile.getName----------图片文件"+multipartFile.getName());
        os.close();
        fis.close();
        inputStream.close();
        if (file.exists()){
            if (file.isFile()){
                FileUtils.deleteQuietly(file);
            }

        }
    } catch (IOException e) {
        // TODO 自动生成的 catch 块
        e.printStackTrace();
    }
}