Question

我在代码中生成csv，生成需要一些时间。因此，一旦生成csv文件，我将发送带有链接的电子邮件。当我点击它时，找不到404错误。当我在html中有相同的链接时，我可以下载它。任何洞察或样本参考

 Sample Link -http://localhost:9090/api/report/file?fileName=filename.csv

下载报告的Java代码

   @RequestMapping(value = "api/report/file")
public void downloadCSV(HttpServletResponse response, @RequestParam("fileName") String fileName) throws IOException {

    File file = new File(fileName);
    InputStream is = new FileInputStream(file);

    response.setContentType("application/octet-stream");
    // Response header
    response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
    // Read from the file and write into the response
    OutputStream os = response.getOutputStream();
    byte[] buffer = new byte[1024];
    int len;
    while ((len = is.read(buffer)) != -1) {
        os.write(buffer, 0, len);
    }
    os.flush();
    os.close();
    is.close();
}

Answer 1

向此映射添加GET方法：@RequestMapping(value = "api/report/file")

使用spring boot下载邮件中的CSV文件链接

1 个答案: