1、首先獲取到需要下載的資料（list），

2、將其轉成Excel格式（具體操作可參考將list轉成Excel表格並下載）：

ExcelFileUtil excel = new ExcelFileUtil();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String date = sdf.format(new Date());
File file = excel.write("君康健康險承保資料報表           操作時間："+date, performanceDetailList, EbizPerfoemanceDetailDto.class);        

3、將得到的file檔案下載到任意位置：

response.setContentType("text/html,charset=utf-8");

        response.setCharacterEncoding("UTF-8");
try {
FileInputStream in = new FileInputStream(file);
OutputStream fos = response.getOutputStream();
response.reset();
response.setContentType("application/x-download");
response.setHeader("Content-disposition", "attachment;filename="+file.getName());
byte[] b = new byte[2048];
int read;
while ((read = in.read(b)) != -1) {
fos.write(b,0,read);
}
fos.flush();
in.close();
fos.close();
} catch (FileNotFoundException e) {
logger.error(e.getMessage());
    }

4、效果如圖：