SpringBoot实现文件下载

最新推荐文章于 2025-06-13 09:53:42 发布

zhangvalue

最新推荐文章于 2025-06-13 09:53:42 发布

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分类专栏： Java

本文链接：https://blog.youkuaiyun.com/zhangvalue/article/details/89387261

在写java 的文件下载的时候一直抛出异常

getOutputStream() has already been called for this response

抛出异常getOutputStream() has already been called for this response

直到使用了下面的方法：

 /**
     * 稿源周报excel表格下载
     * @return
     */

    @RequestMapping(value = "/downExcel", method = RequestMethod.GET, produces = "application/json;charset=UTF-8")
    @ResponseBody
    public String downExcel(HttpServletResponse response) throws UnsupportedEncodingException {
        LocalDate end = LocalDate.now();
        LocalDate start = end.minusDays(14);
        String filename = "稿源抓取周报-" + end.format(DateTimeFormatter.ISO_DATE) + ".xlsx";
        String filepath = "files/" + filename;
        writeExcelFile(start, end, filepath);
        // 如果文件名不为空，则进行下载
        if (filename != null) {
            File file = new File(filepath);
            // 如果文件存在，则进行下载
            if (file.exists()) {