1. 在web.xml中添加監(jiān)聽：

<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

或者

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

2. 寫一個(gè)靜態(tài)方法：

import org.springframework.web.context.request.RequestContextHolder;  
import org.springframework.web.context.request.ServletRequestAttributes;  

/**
 * 獲取 request
 */
public static HttpServletRequest getRequest() {
	return ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
}

/**
 * 獲取 session
 */
public static HttpSession getSession(){
	return getRequest().getSession();
}