jsp页面 下载文件

下载页面

String lj = application.getRealPath("/")+"wireless/hw/tzhsy/";
  File file = new File(lj+"tzhsymd.txt");

<a href="./bmmd.jsp?flag=dcmd" >导出所有选手名单</a><%if(show){ %> <a href="download.jsp?filename=tzhsymd.txt&filepath=<%=lj %>" >下载名单</a><%} %>

download.jsp

<%    
     String filename = request.getParameter("filename");//"tzhsymd.txt";    
     String filepath = request.getParameter("filepath");//"lj";    
      int i = 0;    
     response.setContentType("application/octet-stream");    
     response.setHeader("Content-Disposition","attachment;filename = "+filename);    
     java.io.FileInputStream fileInputStream = new java.io.FileInputStream(filepath+filename);    
     while((i= fileInputStream.read()) != -1){    
         out.write(i);    
     }    
 %> 

可以下载文件保存，而不是直接打开txt