ModelAndView

我给你改一下
public ModelAndView showDept(HttpServletRequest req,HttpServletResponse resp,ModelMap model){
  //获取表中所有信息
  List list=deptInfoDao.findAll();
  //返回部门管理首页
model.addAttribute("list", list);

  return new ModelAndView("dept/showDept",model);
 }
在jsp中
<%
request.getAttribute(“list”);
%>