会话重定向到URL时到期

Question

It seems that when I attempt to call a URL with ModelAndView(), my session is ended and when the view is loaded, a new session is created without any of the data I hope to persist.

     return new ModelAndView("redirect:http//.....)

Is there a better way to handle sessions besides @SessionAttributes when moving to different controllers?

Answer 1

@SessionAttributes session objects are not meant to be shared among controllers. Here are some alternatives:

You can store attributes directly into HttpSession object. You can obtain HttpSession object by adding it to controller method as parameter:

public ModelAndView myControllerMethod(..., HttpSession session) {
  ...
  session.setAttribute("someAttribute", someValue);
  ...
}

You can also autowire HttpSession object and then use it in controller methods:

@Autowired
private HttpSession httpSession;

You can create a session scoped bean and inject that bean into controllers that need it:

<bean id="mySessionDataBean" class="com.example.MySessionDataBeanImpl" scope="session">
    <aop:scoped-proxy />
</bean>

And then use it in controllers (MySessionDataBeanImpl implements SessionDataBean interface in this example):

public class MyController {
    ....
    @Autowired
    SessionDataBean sessionDataBean;

    @RequestMapping(...)
    public ModelAndView controllerMethod(...) {
         ...
         sessionDataBean.setSomeValue(someValue);
    }
}