SpringMVC存取3大域对象

 SpringMVC存取Session的两种方法

-- -  部分来源网络

方法一：使用servlet-api

@Controller  
public class ManagerController {  
  
    @Resource  
    private ManagerService managerServiceImpl;  
      
    @RequestMapping(value = "manager/login.do",method = RequestMethod.GET)    
    public ModelAndView login(ManagerModel managerModel,HttpSession httpSession){  
          
        ManagerModel manager = managerServiceImpl.getManager(managerModel);  
        if(manager!=null){  
            manager.setPassword("");  
            httpSession.setAttribute("manager", manager);  
            return new ModelAndView(new RedirectView("../admin/main.jsp"));  
        }else{  
            return new ModelAndView(new RedirectView("../admin/login.jsp"));  
        }  
    }  
      
    @RequestMapping(value = "manager/logout.do",method = RequestMethod.GET)  
    public String logout(HttpSession httpSession){  
        httpSession.getAttribute("manager");  
        return "success";  
    }  
}  

方法二：使用SessionAttributes

@Controller  
@SessionAttributes("manager")  
public class ManagerController {  
  
    @Resource  
    private ManagerService managerServiceImpl;  
      
    @RequestMapping(value = "manager/login.do",method = RequestMethod.GET)    
    public ModelAndView login(ManagerModel managerModel,ModelMap model){  
          
        ManagerModel manager = managerServiceImpl.getManager(managerModel);  
        if(manager!=null){  
            manager.setPassword("");  
            model.addAttribute("manager", manager);  
            return new ModelAndView(new RedirectView("../admin/main.jsp"));  
        }else{  
            return new ModelAndView(new RedirectView("../admin/login.jsp"));  
        }  
    }  
      
    @RequestMapping(value = "manager/logout.do",method = RequestMethod.GET)  
    public String logout(@ModelAttribute("manager")ManagerModel managerModel){  
        return "success";  
    }  
}  





获取 ServletContext 对象 ;
WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();   
        
ServletContext servletContext = webApplicationContext.getServletContext(); 





获取(父Spring容器 )ApplicationContext对象
spring 中获取applicationContext其实也很简单只要类实现ApplicationContextAware 接口即可，这样你就可获取上下文中所有bean，很好使的。