根据一个oss的地址把图片转换成一个文件
//图片转换 public static File getFileByUrl(String fileUrl) { ByteArrayOutputStream outStream =new ByteArrayOutputStream(); BufferedOutputStream stream =null; InputStream inputStream =null; File file =null; String suffix =""; try { suffix = fileUrl.split("\\.")[1]; URL imageUrl =new URL(fileUrl); HttpURLConnection conn =(HttpURLConnection)imageUrl.openConnection(); conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); inputStream = conn.getInputStream(); byte[] buffer =new byte[1024]; int len =0; while( (len=inputStream.read(buffer)) != -1 ){ outStream.write(buffer, 0, len); } file = File.createTempFile("pattern", "." + suffix); log.info("临时文件创建成功={}", file.getCanonicalPath()); FileOutputStream fileOutputStream =new FileOutputStream(file); stream =new BufferedOutputStream(fileOutputStream); stream.write(outStream.toByteArray()); } catch (Exception e) { log.error("创建人脸获取服务器图片异常", e); } finally { try { if (inputStream !=null) inputStream.close(); if (stream !=null) stream.close(); outStream.close(); } catch (Exception e) {log.error("关闭流异常", e);} } return file; }