第一种，通过springmvc,参数注入

@PostMapping(value = "/xxx")
public Result xxx(HttpServletRequest request) {}

第二种，通过RequestContextHolder获取
这种方式在项目任何地方都可以拿到，只要Request已经注入

 private static HttpServletRequest getRequest() {ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();HttpServletRequest request = attributes.getRequest();return request;
}