public class Route implements Ordered {

	private final String id;

	private final URI uri;

	private final int order;

	private final AsyncPredicate<ServerWebExchange> predicate;

	private final List<GatewayFilter> gatewayFilters;

	private final Map<String, Object> metadata;
}

public interface RouteLocator {
	Flux<Route> getRoutes();
}

public interface RouteDefinitionLocator {
	Flux<RouteDefinition> getRouteDefinitions();
}

@Bean
@Primary
public RouteDefinitionLocator routeDefinitionLocator(List<RouteDefinitionLocator> routeDefinitionLocators) {
    return new CompositeRouteDefinitionLocator(Flux.fromIterable(routeDefinitionLocators));
}

@Bean
@ConditionalOnMissingBean
public PropertiesRouteDefinitionLocator propertiesRouteDefinitionLocator(GatewayProperties properties) {
    return new PropertiesRouteDefinitionLocator(properties);
}

@Bean
@ConditionalOnMissingBean(RouteDefinitionRepository.class)
public InMemoryRouteDefinitionRepository inMemoryRouteDefinitionRepository() {
    return new InMemoryRouteDefinitionRepository();
}

@Bean
public RouteLocator routeDefinitionRouteLocator(GatewayProperties properties,
        List<GatewayFilterFactory> gatewayFilters, List<RoutePredicateFactory> predicates,
        RouteDefinitionLocator routeDefinitionLocator, ConfigurationService configurationService) {
    return new RouteDefinitionRouteLocator(routeDefinitionLocator, predicates, gatewayFilters, properties,
            configurationService);
}

@Bean
@Primary
@ConditionalOnMissingBean(name = "cachedCompositeRouteLocator")
public RouteLocator cachedCompositeRouteLocator(List<RouteLocator> routeLocators) {
    return new CachingRouteLocator(new CompositeRouteLocator(Flux.fromIterable(routeLocators)));
}

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

@Component
public class DynamicRouteDefinitionLocator implements RouteDefinitionLocator {

    @NacosConfig(dataId = "gateway-routes.json", group = "DEFAULT_GROUP")
    private String routesJson;
    private final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    @Autowired
    private ApplicationEventPublisher eventPublisher;
    @Autowired
    private RouteDefinitionWriter routeDefinitionWriter;

    @NacosConfigListener(dataId = "gateway-routes.json", group = "DEFAULT_GROUP")
    public void routesListener(String data) {
        this.routesJson = data;
        // 發(fā)送路由刷新事件，getRouteDefinitions()會重新觸發(fā)
        eventPublisher.publishEvent(new RefreshRoutesEvent(this));
    }

    @Override
    public Flux<RouteDefinition> getRouteDefinitions() {
        try {
            return Flux.fromIterable(OBJECT_MAPPER.readerForListOf(RouteDefinition.class).readValue(routesJson));
        } catch (JsonProcessingException e) {
            return Flux.empty();
        }
    }
}

[
    {
        "id": "tb_route",
        "uri": "https://www.taobao.com",
        "predicates": [
            {
                "name": "Path",
                "args": {
                    "pattern": "/tb/**"
                }
            }
        ],
        "filters": [
            {
                "name": "StripPrefix",
                "args": {
                    "parts": "1"
                }
            }
        ]
    }
]

[
     {
        "id": "jd_route",
        "uri": "https://www.jd.com/",
        "predicates": [
            {
                "name": "Path",
                "args": {
                    "pattern": "/jd/**"
                }
            }
        ],
        "filters": [
            {
                "name": "StripPrefix",
                "args": {
                    "parts": "1"
                }
            }
        ]
    }
]