文件MultipartFile 转 file 工具类

r囧r小猫 2022-12-31 05:22 128阅读 0赞

>     @Component
>     public class MultipartFileToFile {
>         /**
>          * MultipartFile 转 File
>          *
>          * @param file
>          * @throws Exception
>          * @return
>          */
>         public static File multipartFileToFile(MultipartFile file) throws Exception {
>     
>             File toFile = null;
>             if (file.equals("") || file.getSize() <= 0) {
>                 file = null;
>             } else {
>                 InputStream ins = null;
>                 ins = file.getInputStream();
>                 toFile = new File(file.getOriginalFilename());
>                 inputStreamToFile(ins, toFile);
>                 ins.close();
>             }
>             return toFile;
>         }
>     
>         //获取流文件
>         private static void inputStreamToFile(InputStream ins, File file) {
>             try {
>                 OutputStream os = new FileOutputStream(file);
>                 int bytesRead = 0;
>                 byte[] buffer = new byte[8192];
>                 while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
>                     os.write(buffer, 0, bytesRead);
>                 }
>                 os.close();
>                 ins.close();
>             } catch (Exception e) {
>                 e.printStackTrace();
>             }
>         }
>     
>         /**
>          * 删除本地临时文件
>          *
>          * @param file
>          */
>         public static void delteTempFile(File file) {
>             if (file != null) {
>                 File del = new File(file.toURI());
>                 del.delete();
>             }
>         }
>     
>     }

获取Md5 哈希值

>     DigestUtils.md5Hex(new FileInputStream(MultipartFileToFile.multipartFileToFile(file)))