跨域过滤器

@Component
public class CorsFilter implements Filter {
   @Override
   public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
         ServletException {
      HttpServletRequest request = (HttpServletRequest) req;
      HttpServletResponse response = (HttpServletResponse) res;
      response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
      response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT, GET");
      response.setHeader("Access-Control-Max-Age", "3600");
      response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
      response.setHeader("Access-Control-Allow-Headers", "token,userId,Content-Type,x-is-mini-program-environment");
      response.setHeader("Access-Control-Allow-Credentials", "true");
//    HttpServletRequestWrapper requestWrapper = new HttpServletRequestWrapper((HttpServletRequest) request) {
//       /**
//        */
//       @Override
//       public String getContentType() {
//          // 先从原本的Request中获取头，如果为空且名字为token，则从参数中查找并返回
//          String contentType = super.getContentType();
//
////            if("Content-Type".equals(name)){
////               String contentType = request.getHeader("Content-Type");
//             return contentType.replace("multipart/form-data,","");
////            }
////            return superHeader;
//       }
//    };


//    request.getContentType(); //setAttribute("Content-Type", contentType.replace("multipart/form-data,",""));
      chain.doFilter(request, res);
   }

   @Override
   public void init(FilterConfig filterConfig) {
   }

   @Override
   public void destroy() {
   }
}