Java后端获取前端传过来header中的值

Java后端获取前端传过来header中的值
比如获取前端传值token值：
方法一：不需要在参数中写HttpServletRequest request

ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request1 = attributes.getRequest();
String token=request1.getHeader("token");

 

方法二：需要在参数中写HttpServletRequest request

String token = request.getHeader("token");