SpringCloud Gateway网关 全局过滤器[AntPathMatcher 某些路径url禁止访问] 实现用户鉴权

前提：先保证Gateway网关项目 和 Nacos注册中心 等可以正常访问和调用，搭建方法可查看博文
SpringCloud Gateway网关 项目创建 及 整合Nacos开发_spring gateway如何设置工程名称-CSDN博客

类似的全局鉴权方案，参考如下： 
SpringCloud Gateway网关 全局过滤器[header token] 实现用户鉴权_gateway添加鉴权过滤器-CSDN博客

核心代码如下： 

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;import java.nio.charset.StandardCharsets;@Component
public class GlobalAuthFilter implements GlobalFilter, Ordered {private AntPathMatcher antPathMatcher = new AntPathMatcher();@Overridepublic Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {ServerHttpRequest serverHttpRequest = exchange.getRequest();String path = serverHttpRequest.getURI().getPath();// 判断路径中是否包含 system，如果包含system,则不允许访问if (antPathMatcher.match("/**/system/**", path)) {ServerHttpResponse response = exchange.getResponse();response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");response.setStatusCode(HttpStatus.FORBIDDEN);DataBufferFactory dataBufferFactory = response.bufferFactory();DataBuffer dataBuffer = dataBufferFactory.wrap("无权限".getBytes(StandardCharsets.UTF_8));return response.writeWith(Mono.just(dataBuffer));//设置状态码 未授权401//exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);//个人理解,终止输出访问//return exchange.getResponse().setComplete();}return chain.filter(exchange);}/*** 优先级提到最高** @return*/@Overridepublic int getOrder() {return 0;}
}