将浏览器中的文件 url转换为File流

/**      * 将图片转为file      *      * @param url 图片url      * @return File      * @author dyc      * date:   2020/9/4 14:54      */     public File getFile(String url) throws Exception {         //以当地文件命名         String fileName = url.substring(url.lastIndexOf("."),url.length());         File file = null;          URL urlfile;         InputStream inStream = null;         OutputStream os = null;         try {             file = File.createTempFile("net_url", fileName);             //下载             urlfile = new URL(url);             inStream = urlfile.openStream();             os = new FileOutputStream(file);              int bytesRead = 0;             byte[] buffer = new byte[8192];             while ((bytesRead = inStream.read(buffer, 0, 8192)) != -1) {                 os.write(buffer, 0, bytesRead);             }         } catch (Exception e) {             e.printStackTrace();         } finally {             try {                 if (null != os) {                     os.close();                 }                 if (null != inStream) {                     inStream.close();                 }              } catch (Exception e) {                 e.printStackTrace();             }         }          return file;     }