一个关于jspsmartupload下载的问题
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lzq_dragon@163.com,再次感谢！

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