jsp实现下载功能

<%@ page language="java" pageEncoding="UTF-8"%>


//上面无需设置ContentType


<%


response.addHeader("Pragma", "no-cache");


response.addHeader("Cache-Control", "no-cache");


response.addHeader("Expires", "Thu,01 Jan 1970 00:00:01 GMT");


response.setContentType("bin;charset=gbk");


response.addHeader("Content-Disposition","attachment; filename=filename");


ServletOutputStream os = response.getOutputStream();


//do something with OutputStream


os.close();


%>