由于jspsmartupload上传文件，当前端页面没有file控件时，后端用jspsmartupload控件upload时将会走入一个死循环。现在采用struts自己提供的功能实现文件的上传。
1、前端页面upload.jsp
<html:form action="/filesave.do" styleId="formItem" method="post"  enctype="multipart/form-data">
<INPUT  class='input-file' type="file" name="theFile">
</html:form>
2、struts-config.xml文件配置
<form-bean name="UploadForm" type="yhp.test.web.UploadForm" />
<action input="/upload.jsp" name="UploadForm"   path="/filesave" scope="request" type="yhp.test.web.UploadAction" validate="false">
      <forward name="success" path="/success.jsp" />
      <forward name="error" path="/error.jsp" />
    </action>
3、UploadForm.java文件
package yhp.test.web;

import org.apache.struts.upload.FormFile;
import org.apache.struts.action.ActionForm;

public class UploadForm extends ActionForm {
  protected String theText;   //使用protected ,其它需要上传的form可以继承此form
  protected boolean writeFile = true;
  protected FormFile theFile;
  protected String filePath;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

public class UploadAction extends Action {
  public ActionForward execute(ActionMapping actionMapping,
                               ActionForm actionForm,
                               HttpServletRequest httpServletRequest,
                               HttpServletResponse httpServletResponse) throws
      Exception {
    if (actionForm instanceof UploadForm) {
      // 获取上传的目录
      String path = getServlet().getServletContext().getInitParameter("UPLOADPATH");
      File f = new File(path);
      if (!f.isDirectory()) {
        f.mkdir();
      }

      UploadForm theForm = (UploadForm) actionForm;
      String text = theForm.getTheText();
      FormFile file = theForm.getTheFile();
      String fileName = file.getFileName();
      String contentType = file.getContentType();
      boolean writeFile = theForm.getWriteFile();
      String desFileName=path fileName ;
      String size = (file.getFileSize() + " bytes");
      try {
          InputStream stream = file.getInputStream();
   OutputStream bos = new FileOutputStream(strFileName);         
          byte[] buffer = new byte[file.getFileSize()];
          stream.read(buffer);
          bos.write(buffer);
   stream.close(); 
          bos.close();
          return actionMapping.findForward("success");
      }
      catch (FileNotFoundException fnfe) {
          return actionMapping.findForward("success");
      }
      catch (IOException ioe) {
          return actionMapping.findForward("success");
      }
      catch(Exception eo){
          return actionMapping.findForward("error");
      } 
    }else{
      return actionMapping.findForward("error");
    }
  }
}