如何实现在Spring Boot，JSP，JavaScript，MySQL数据库中点击下载CSV文件？

@Controller
public class DownloadController {

    @GetMapping("/download")
    public void downloadCSV(HttpServletResponse response) {
        // 连接到MySQL数据库，查询需要导出为CSV文件的数据
        List<User> userList = userRepository.findAll();

        // 构建CSV文件的内容
        StringBuilder csvContent = new StringBuilder();
        csvContent.append("ID,Name,Email\n");
        for (User user : userList) {
            csvContent.append(user.getId()).append(",")
                    .append(user.getName()).append(",")
                    .append(user.getEmail()).append("\n");
        }

        try {
            // 设置HTTP响应的头部信息
            response.setContentType("text/csv");
            response.setHeader("Content-Disposition", "attachment; filename=users.csv");

            // 将CSV文件的内容写入HTTP响应的输出流中
            PrintWriter writer = response.getWriter();
            writer.write(csvContent.toString());
            writer.flush();
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

function downloadCSV() {
    window.location.href = "/download";
}