springmvc中controller层怎么把dao层的map传回前台

Question

service层
public Object test() {

    return personalDao.test();
}

dao层
public Object test() {
Map map = new HashMap();
//中间为查询内容，最后放入map中
return map;
}
contorller层
public ModelAndView main(HttpServletRequest request) {

    Object h = hrPersonalService.test();
    ModelAndView view = new ModelAndView("test/test");
    return view;
}
需要把dao层中return的map传回前台页面

Answer 1

public ModelAndView main(HttpServletRequest request) {
Object h = hrPersonalService.test();
ModelAndView view = new ModelAndView("test/test");
return view.addObject("h", h);
}
在前台用EL表达式去取就好了