ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java

/**
 * 本地资源通用下载
 */
@GetMapping("/download/resource")
public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
        throws Exception
{
    try
    {
        if (!FileUtils.checkAllowDownload(resource))
        {
            throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
        }
        // 本地资源路径
        String localPath = RuoYiConfig.getProfile();
        // 数据库资源地址
        String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
        // 下载名称
        String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
        response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
        FileUtils.setAttachmentResponseHeader(response, downloadName);
        FileUtils.writeBytes(downloadPath, response.getOutputStream());
    }
    catch (Exception e)
    {
        log.error("下载文件失败", e);
    }
}