1.最简单的方式（注解法）
@Autowired
private HttpServletRequest request;
2.最麻烦的方法
a. 在web.xml中配置一个监听
<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>
b.之后在程序里可以用
HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
3.最直接的方法
public String hello(HttpServletRequest request,HttpServletResponse response)
赠送一个如何在Struts2中获取request对象
HttpServletRequest request = ServletActionContext.getRequest();