RequestContextHolder 的使用与实践
以下这种方式可以在service层不需要通过改现有的方法去获取到request、responce、session
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = requestAttributes.getRequest();
借鉴《看透SpringMVC的分析与实践》中的理解
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