[mvc] HttpServletRequest

[Alice52]

构建带有 Header 的HttpServletRequest

1. 目的是为了应对 RequestContextHolder 获取上线文信息

2. code

     public static void main(String[] args) {
   
         HttpServletRequestWrapper wrapper = new HttpServletRequestWrapper(new Request(null)) {
             @Override
             public String getHeader(String name) {
                 if (HISTORY_FLG_HEADER.equals(name)) {
                     return HISTORY_FLG_TRUE.toString();
                 }
                 return null;
             }
         };
   
         RequestAttributes bi = new ServletRequestAttributes(wrapper);
         RequestContextHolder.setRequestAttributes(bi);
   
         RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
         ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes)requestAttributes;
         String header = servletRequestAttributes.getRequest().getHeader(HISTORY_FLG_HEADER);
     }

reference

1. autowire HttpServeletRequest 原理