code: public void customizeListForm(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request, ModelListForm modelListForm)
  			throws Exception {
  
  	}
docs: 定制ModelListForm
  
  缺省ModelListForm是只有一个List，包含一种Model集合
  有的应用可能是两种Model集合，可以继承ModelListForm实现Map-backed ActionForms
  再继承本Action，实现本方法。
  
  @param actionMapping
  @param actionForm
  @param request
  @param modelListForm
  @throws java.lang.Exception