java直接获取request、response

第一种、参数

@RequestMapping("/test")
@ResponseBody
public void saveTest(HttpServletRequest req, HttpServletResponse resp){　　
}

第二种、注解

@Autowired  
private  HttpServletRequest request;  

第三种、上下文获取

1、在web.xml配置监听器

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

2、程序使用(!!!!!!---比较重要,能够凭空获取)(获取当前线程的request ，response)

HttpServletRequest req = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
HttpServletResponse resp = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getResponse();