文件下载

Question

mySmartUpload.downloadFile("g:/baktomcat/webapps/jsp/upload/a.txt","application/octet-stream");

Answer 1

问题1：下列代码报错：getOutputStream() has already been called.代码如下：
<%@ page language="java" import="com.jspsmart.upload.*"%>
<jsp:useBean id="mySmartUpload" scope="page" class="com.jspsmart.upload.SmartUpload" />
<%
     mySmartUpload.initialize(pageContext);
     Download file mySmartUpload.downloadFile("g:/baktomcat/webapps/jsp/upload/a.txt","application/octet-stream");
%>
问题2：另外下面两个语句也可以实现根据文件路径打开文件的功能,请问与上面的代码比这两种方式的区别：
java.io.FileInputStream fileInputStream = 
  new java.io.FileInputStream(filepath + filename); 
  out.write(i);