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最新推荐文章于 2021-01-07 23:01:28 发布

qq_16009267

最新推荐文章于 2021-01-07 23:01:28 发布

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本文链接：https://blog.youkuaiyun.com/qq_16009267/article/details/52959467

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public void fileOutputStream(HttpServletRequest req, HttpServletResponse resp) 
            throws ServletException, IOException {
        String filepath = req.getRequestURI();
        int index = filepath.indexOf(Global.USERFILES_BASE_URL);
        if(index >= 0) {
            filepath = filepath.substring(index + Global.USERFILES_BASE_URL.length());
        }
        try {
            filepath = UriUtils.decode(filepath, "UTF-8");
        } catch (UnsupportedEncodingException e1) {
            logger.error(String.format("解释文件路径失败，URL地址为%s", filepath), e1);
        }
        File file = new File(Global.getUserfilesBaseDir() + Global.USERFILES_BASE_URL + filepath);
        try {
            FileCopyUtils.copy(new FileInputStream(file), resp.getOutputStream());
            resp.setHeader("Content-Type", "application/octet-stream");
            return;
        } catch (FileNotFoundException e) {
            req.setAttribute("exception", new FileNotFoundException("请求的文件不存在"));
            req.getRequestDispatcher("/WEB-INF/views/error/404.jsp").forward(req, resp);
        }
    }