一个关于jspsmartupload下载的问题

[D_ragon]

昨天作了一个简单的下载的页面，可是总是有问题，在网上找了很多解决方法但是仍然不行！希望那位高手帮忙看下，感激之至！
代码：
<%@ page contentType="text/html;charset=gb2312" import="com.jspsmart.upload.*" %>
<%response.reset();
SmartUpload su = new SmartUpload();
response.reset();
su.initialize(pageContext);
su.setContentDisposition(null);
su.downloadFile("/upload/test.txt");%>
错误信息：
java.lang.IllegalStateException: getWriter() has already been called for this response
org.apache.catalina.connector.Response.getOutputStream(Response.java:565)
org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:171)
com.jspsmart.upload.SmartUpload.downloadFile(SmartUpload.java:579)
com.jspsmart.upload.SmartUpload.downloadFile(SmartUpload.java:508)
com.jspsmart.upload.SmartUpload.downloadFile(SmartUpload.java:476)
org.apache.jsp.download_jsp._jspService(org.apache.jsp.download_jsp:50)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:325)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
EncodingFilter.doFilter(EncodingFilter.java:40)

那位高手帮小弟看一下把！非常感谢！或者谁有jspsmartupload的源码及应用实例发给我，我的邮箱是[e-mail],再次感谢！

[jerrycccc2323]

已经发给你了，带视频讲解，请查收。

[buttontwo]

[e-mail]

给我也来份

[qichunren]

我在网上找的JSPsmartupload只有CLASS文件啊,没有JAVA文件啊.哪个有,给我一份啊

[qichunren]

忘记说我的邮箱了
[e-mail]

[letian110]

[e-mail]发我一份，多谢了

[luowenwei]

我也要啊
[e-mail]