code: public List<String> headerList(String name) {
  		if(StrUtil.isBlank(name)) {
  			return null;
  		}
  		
  		final CaseInsensitiveMap<String,List<String>> headersIgnoreCase = new CaseInsensitiveMap<>(this.headers);
  		return headersIgnoreCase.get(name.trim());
  	}
docs: 根据name获取头信息列表
  @param name Header名
  @return Header值
  @since 3.1.1