利用jspsmart，怎么写sevelet以下载服务器上的文件？

Question

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

Answer 1

public class up_downloadSevelet extends HttpServlet {

private ServletConfig config;
final public void init(ServletConfig config) throws ServletException {
this.config = config;
}

final public ServletConfig getServletConfig() {
return config;
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

String filename=request.getParameter("filename");//需要处理一下文件路径
response.addHeader("Content-Disposition","attachment;filename="+filename);

//SmartUpload su=new SmartUpload(getConfig().getServletContext(),request,response);
SmartUpload mySmartUpload=new SmartUpload();
try
{
mySmartUpload.initialize(config,request,response);
mySmartUpload.setContentDisposition(null);
mySmartUpload.downloadFile("d:\\"+filename);
}
catch(Exception e)
{}
}


public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
this.doGet(req, resp);
}
}
这是我写的，但是不能实现文件的下载

Answer 2

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")%>

Answer 3

<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