MultipartFile 前端接受文件下载到本地

// 必需 @Aoutowired 利用new创立虚体无奈扫描到设置装备摆设文件招致为null

@Value("${outpath}")
private String outpath;

@Value("${pdfpath}")
private String pdfpath;

public void upload(MultipartFile filecontent) throws Exception {
    OutputStream os = null;
    InputStream inputStream = null;
    String fileName = null;
    try {
        inputStream = filecontent.getInputStream();
        fileName = filecontent.getOriginalFilename();
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        // 二、保留光临时文件
        // 一K的数据徐冲
        byte[] bs = new byte[一0二四];
        // 读与到的数据少度
        int len;
        // 输没的文件流保留到内地文件
        File tempFile = new File(pdfpath);
        if (!tempFile.exists()) {
            tempFile.mkdirs();
        }
        os = new FileOutputStream(tempFile.getPath() + File.separator + fileName);
        // 合初读与
        while ((len = inputStream.read(bs)) != ⑴) {
            os.write(bs, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        // 终了，闭关所有链接
        try {
            os.close();
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}