spring在任何地方使用request

1：配置
web.xml

    <listener>       <listener-class>         org.springframework.web.context.request.RequestContextListener       </listener-class>      </listener> 

2在代码任何地方

import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();