MultipartFile轉base64

MultipartFile首先轉換成file然后再講file轉換成base64格式

 public String getBase64String(MultipartFile multiPartFile) throws IOException {
        String baseStr = null;

        //把MultipartFile轉化為File
        File file = new File(multiPartFile.getOriginalFilename());
        FileUtils.copyInputStreamToFile(multiPartFile.getInputStream(), file);

        try {
　　　　　　　　//file轉base64
            FileInputStream inputStream = new FileInputStream(file);
            byte[] buffer = new byte[(int) file.length()];
            inputStream.read(buffer);
            inputStream.close();
            baseStr = new BASE64Encoder().encode(buffer);

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        //刪除臨時文件
        if (file.exists()) {
            file.delete();
        }
        baseStr = baseStr.replaceAll("\r\n", "");
        return baseStr;
    }

 

 

MultipartFile直接轉base64

public String getBase64String(MultipartFile multiPartFile) throws IOException {
        String baseStr = null;
        BASE64Encoder encoder = new BASE64Encoder();
        baseStr= encoder.encode(multiPartFile.getBytes());
        baseStr = baseStr.replaceAll("\r\n", "");
        return baseStr;
    }