利用jspsmart，怎么写sevelet以下载服务器上的文件？
我想利用jspsmart组件，写一个sevelet，以实现对文件的下载？请大家帮忙

------解决方案--------------------
jspSmartUpload的例子：

<%@ page language= "java " import= "com.jspsmart.upload.* "%> <jsp:useBean id= "mySmartUpload " scope= "page " class= "com.jspsmart.upload.SmartUpload " /> <%

// Initialization
mySmartUpload.initialize(pageContext);

// Download file
mySmartUpload.downloadFile( "/upload/sample.zip ");

// With a physical path
// mySmartUpload.downloadFile( "c:\\temp\\sample.zip ")

// With options
// mySmartUpload.downloadFile( "/upload/sample.zip ", "application/x-zip-compressed ", "downloaded.zip ")

%>
------解决方案--------------------
<jsp:useBean id= "mySmartUpload " scope= "page " class= "com.jspsmart.upload.SmartUpload " /> <%
mySmartUpload.initialize(pageContext);
// 设定contentDisposition为null以禁止浏览器自动打开文件，
//保证点击链接后是下载文件。若不设定，则下载的文件扩展名为txt时，直接在浏览器打开。
//文件类型为doc时，浏览器将自动用word打开它。扩展名为pdf时浏览器将用acrobat打开。
mySmartUpload.setContentDisposition(null);
// 下载文件
mySmartUpload.downloadFile( "/upload/test.txt ");%>


servlet就不知道了