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springcloud Gateway网关自定义过滤器类型主要分全局和指定路由两种：

GatewayFilter又有两种实现方式：

@Componentpublic class SignFilter implements GatewayFilter, Ordered {    @Override    public Mono
   
     filter(ServerWebExchange exchange, GatewayFilterChain chain) {        exchange.getResponse().setStatusCode(HttpStatus.OK);        //exchange.getResponse().getHeaders().add("Content-Type", "application/json;charset=UTF-8");        ApiResponse result = new ApiResponse();                String sign = exchange.getRequest().getQueryParams().getFirst("sign");        if(StringUtils.isEmpty(sign)) {            result.setCode("99");            result.setMessage("签名验证失败");            DataBuffer dataBuffer = exchange.getResponse().bufferFactory().wrap(JsonUtil.objToJsonBytes(result));            return exchange.getResponse().writeWith(Flux.just(dataBuffer));        }        return chain.filter(exchange);    }    /**过滤器群执行顺序     * 值越大则优先级越低     * */    @Override    public int getOrder() {        return 0;    }  }
   

注入bean：

@SpringBootApplicationpublic class GateWayApplicationMain {    public static void main(String[] args) {        SpringApplication.run(GateWayApplicationMain.class, args);    }        /**自定义过滤器有两种实现方式*/    @Bean    public RouteLocator routeLocator(RouteLocatorBuilder builder) {        return builder.routes().route(r ->                r.path("/sys/**")                .uri("http://localhost:6320")                .filters(new SignFilter())                .id("apiweb"))            .build();    }    }

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