获取当前线程的HttpServletRequest对象

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有时候,需要获取request对象,但是方法入参里面又没有这个参数.需要另外的获取方式.如下:
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

org.springframework.web.context.request.RequestContextHolder
org.springframework.web.context.request.RequestAttributes
org.springframework.web.context.request.ServletRequestAttributes