SmartUpload su = new SmartUpload();
     su.initialize(pageContext);
pageContext变量找不到，并且不能用new PageContext()定义该变量，如何解决呢？

在class="tags" href="/tags/ACTION.html" title=action>action中可以这样得到pageContetext对象  
class="tags" href="/tags/IMPORT.html" title=import>import javax.class="tags" href="/tags/SERVLET.html" title=servlet>servlet.jsp.JspFactory;
class="tags" href="/tags/IMPORT.html" title=import>import com.jspsmart.upload.SmartUpload;
SmartUpload su = new SmartUpload();
JspFactory _jspxFactory = JspFactory.getDefaultFactory();
        javax.class="tags" href="/tags/SERVLET.html" title=servlet>servlet.jsp.PageContext pageContext =
                                        _jspxFactory.getPageContext(
                                                this.getServlet(),
                                                request,
                                                response,
                                                null,
                                                true,
                                                8192,true);
su.initialize(pageContext);

class="tags" href="/tags/SERVLET.html" title=servlet>servlet中
public   class   class="tags" href="/tags/SERVLET.html" title=servlet>servletUpload   extends   HttpServlet  
  {  
      private   ServletConfig   config;  
      public   void   destroy()     {     }  
      public   void   doGet(HttpServletRequest   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletrequest,    
                                          HttpServletResponse   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletresponse)              
                                          throws   ServletException,   IOException     {     }  
      protected   void   doPost(HttpServletRequest   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletrequest,    
                                                  HttpServletResponse   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletresponse)  
                                                  throws   ServletException,   IOException  
      {  
          SmartUpload   smartupload   =   new   SmartUpload();  
          try  
          {  
              smartupload.initialize(getServletConfig(),   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletrequest,   httpclass="tags" href="/tags/SERVLET.html" title=servlet>servletresponse);  
              smartupload.upload();  
              ......  
          }  
          catch(Exception   class="tags" href="/tags/EXCEPTION.html" title=exception>exception)  
          {  
          }  
      }  
   
      public   final   ServletConfig   getServletConfig()     {         return   config;     }  
      public   final   void   init(ServletConfig   class="tags" href="/tags/SERVLET.html" title=servlet>servletconfig)             throws   ServletException  
      {  
          config   =   class="tags" href="/tags/SERVLET.html" title=servlet>servletconfig;  
      }