Spring MVC - 会话差异 [英] Spring MVC - Session differences

问题描述

通过 HttpServletRequest.getSession（）和 HttpSession 在控制器方法中注入会话之间是否有任何区别？

Are there any differences between getting session through HttpServletRequest.getSession() and HttpSession injected in controller's method?

推荐答案

基本上，会话对象注入 Spring MVC 控制器：

Basically there is no diffrerence between the session object injected into a Spring MVC controller:

@RequestMapping(value = "/somepath", method = RequestMethod.POST)
@ResponseBody
public JsonResponse someMethod (HttpSession session)
{
 // play with session attributes
}

从 HttpServletRequest中检索的会话对象：

And the session object retrieved from the HttpServletRequest:

@RequestMapping(value = "/somepath", method = RequestMethod.POST)
@ResponseBody
public JsonResponse someMethod (HttpServletRequest request)
{
  Session session = request.getSession();
  // You are playin with the same session attributes.
}

前一种风格只为您提供了获取上下文<$ c的工具$ c> HttpSession 将对象注入控制器参数，以便 Spring 为你处理所有脏东西。

The former style just provide you with a facility to get the contextual HttpSession object by injecting it as a controller argument so that Spring takes care of the all the dirty stuff for you.

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