;utf-8"); } //告知浏览器文件的类型(响应体) response.setContentType(getServletContext().getMimeType(filename)); //告知浏览器以附件的方式提供下载功能 而不是解析 response.setHeader("Content-Disposition","attachment;filename="+filenameEncoder); //服务器获取后开始进行复制的程序:获取字节输出流 ServletOutputStream sos = response.getOutputStream(); //获取数据源的绝对路径 String realpath = getServletContext().getRealPath("download/"+filename); //获取字节输入流 FileInputStream fis =new FileInputStream(realpath); //开始复制 byte[] bytes=new byte[1024]; int len=0; while((len=fis.read(bytes))!=-1){ sos.write(bytes, 0, len); } //释放资源 fis.close(); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); }
}
2、response细节点:
①、response获得的流不需要手动关闭,web容器(tomcat容器)会帮助我们关闭,
②、getWriter和getOutputStream不能同时调用
③、重定向语句一般作为终结代码
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