用jsmartcom上传文件出错

我是初学者，测试用jsmartcom上传文件时出错
jsp代码如下：

正在上传文件...

        <%
        mysmartUpload.initialize(pageContext);
        try {
            mysmartUpload.setAllowedFilesList("jpg,gif");//此处的文件格式可以根据需要自己修改
            mysmartUpload.setMaxFileSize(4000000);
            //上载文件 
            mysmartUpload.upload();
        } catch (Exception e) {
    %>
        <SCRIPT language=javascript> 

alert("只允许上传.jpg和.gif类型图片文件");
window.location='Upload.htm';

<%
}
%>

        <%
        try{
                //mysmartUpload.initialize(pageContext);
                //mysmartUpload.service(request, response);
                System.out.println("11111111111111111111111111111111");
                //mysmartUpload.upload();
                String fn = mysmartUpload.getFiles().getFile(0).getFieldName();
                System.out.println("222222222222222222" + fn);
                mysmartUpload.save("upload/");
                System.out.println("11111111111111111111111111111111");
                out.println("已经成功上传了文件，请查看<a href=upload/" + fn
                + ">这里</a>,看文件是否上传成功");
            } catch (Exception e) {
                e.printStackTrace();
            }
        %>
        <a href=Upload.html>重新上传</a>
</body>

抛出的异常如下：
java.lang.IllegalArgumentException: Files' name is invalid or does not exist (1205).
at com.jspsmart.upload.Files.getFile(Files.java:73)
at org.apache.jsp.Upload_jsp._jspService(Upload_jsp.java:104)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:257)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:184)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:206)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:833)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:732)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:619)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:688)
at java.lang.Thread.run(Thread.java:595)

肯请各路高手支招

[b]问题补充：[/b]
此页为上传页

Untitled Document

---

upload file

name:

[b]问题补充：[/b]
好像不行，没有对应的getName()方法，还是谢谢你
[b]问题补充：[/b]
哥们儿，把我的q加上吧，这样不太方便，876840307
[b]问题补充：[/b]
:idea: 多谢，送你积分，祝你快乐

看下就ok了

http://www.knowsky.com/3136.html
http://www.blogjava.net/hijackwust/archive/2007/08/22/138598.html

把上传页面代码粘出来看

String fn = mysmartUpload.getFiles().getFile(0).getFieldName();
应该是这行抛的异常
改成
String fn = mysmartUpload.getFiles().getFile(0).getName();看看，

对了，你先把mysmartUpload.getFiles()打印出来，看里面是不是有文件