spring mvc实现下载一个excel文件的java web程序

1.设置文件名

String fileName="batch_fund_template.xls";

2设置ContentType

response.setContentType("application/vnd.ms-excel");

3.设置文件路径

String nowPath=request.getSession().getServletContext().getRealPath("/")+"/"+"WEB-INF"+"/"+"template"+"/"+fileName;

4.新建文件对象

File file=new File(nowPath);

5.清空response

response.reset();

6.设置response的header

response.addHeader("Content-Disposition", "attachment;filename="+new String(fileName.getBytes("gbk"),"iso-8859-1"));
response.addHeader("Content-Length", ""+file.length());
7.以流的方式下载文件

            InputStream fis=new BufferedInputStream(new FileInputStream(nowPath));
           byte[] buffer=new byte[fis.available()];
           fis.read(buffer);
           fis.close();

           toClient=new BufferedOutputStream(response.getOutputStream());
           toClient.write(buffer);
           toClient.flush();
           toClient.close();

项目截图