jeecgboot启动gateway找不到路由的问题（跨域访问的问题）
将nacos改为本地，并且将gateway获取路由的方式改为从nacos获取，结果无法获取。
开始排查问题，首先看打印日志，发现已经连接本地nacos但是没有找到路由。
2021-10-05 21:51:58.483 [main] INFO org.jeecg.loader.DynamicRouteLoader:70 - 初始化路由，dataType：nacos 2021-10-05 21:52:00.477 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [After] 2021-10-05 21:52:00.477 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Before] 2021-10-05 21:52:00.478 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Between] 2021-10-05 21:52:00.478 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Cookie] 2021-10-05 21:52:00.478 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Header] 2021-10-05 21:52:00.478 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Host] 2021-10-05 21:52:00.478 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Method] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Path] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Query] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [ReadBodyPredicateFactory] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [RemoteAddr] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [Weight] 2021-10-05 21:52:00.479 [main] INFO o.s.c.gateway.route.RouteDefinitionRouteLocator:139 - Loaded RoutePredicateFactory [CloudFoundryRouteService] 2021-10-05 21:52:00.540 [boundedElastic-1] INFO com.alibaba.nacos.client.naming:64 - initializer namespace from System Property :null 2021-10-05 21:52:00.540 [boundedElastic-1] INFO com.alibaba.nacos.client.naming:73 - initializer namespace from System Environment :null 2021-10-05 21:52:00.541 [boundedElastic-1] INFO com.alibaba.nacos.client.naming:83 - initializer namespace from System Property :null 2021-10-05 21:52:00.541 [main] INFO com.alibaba.nacos.client.config.impl.ClientWorker:262 - [fixed-192.168.0.2_8848] [subscribe] jeecg-gateway-router.json+DEFAULT_GROUP 2021-10-05 21:52:00.542 [main] INFO com.alibaba.nacos.client.config.impl.CacheData:93 - [fixed-192.168.0.2_8848] [add-listener] ok, tenant=, dataId=jeecg-gateway-router.json, group=DEFAULT_GROUP, cnt=1 2021-10-05 21:52:00.621 [boundedElastic-3] INFO com.alibaba.nacos.client.naming:191 - new ips(1) service: DEFAULT_GROUP@@jeecg-gateway -> [{"instanceId":"192.168.0.2#9999#DEFAULT#DEFAULT_GROUP@@jeecg-gateway","ip":"192.168.0.2","port":9999,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-gateway","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:00.621 [boundedElastic-4] INFO com.alibaba.nacos.client.naming:191 - new ips(1) service: DEFAULT_GROUP@@jeecg-system -> [{"instanceId":"192.168.0.2#7001#DEFAULT#DEFAULT_GROUP@@jeecg-system","ip":"192.168.0.2","port":7001,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-system","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:00.621 [boundedElastic-2] INFO com.alibaba.nacos.client.naming:191 - new ips(1) service: DEFAULT_GROUP@@jeecg-activiti -> [{"instanceId":"192.168.0.2#8099#DEFAULT#DEFAULT_GROUP@@jeecg-activiti","ip":"192.168.0.2","port":8099,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-activiti","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:00.627 [boundedElastic-2] INFO com.alibaba.nacos.client.naming:228 - current ips:(1) service: DEFAULT_GROUP@@jeecg-activiti -> [{"instanceId":"192.168.0.2#8099#DEFAULT#DEFAULT_GROUP@@jeecg-activiti","ip":"192.168.0.2","port":8099,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-activiti","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:00.627 [boundedElastic-3] INFO com.alibaba.nacos.client.naming:228 - current ips:(1) service: DEFAULT_GROUP@@jeecg-gateway -> [{"instanceId":"192.168.0.2#9999#DEFAULT#DEFAULT_GROUP@@jeecg-gateway","ip":"192.168.0.2","port":9999,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-gateway","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:00.627 [boundedElastic-4] INFO com.alibaba.nacos.client.naming:228 - current ips:(1) service: DEFAULT_GROUP@@jeecg-system -> [{"instanceId":"192.168.0.2#7001#DEFAULT#DEFAULT_GROUP@@jeecg-system","ip":"192.168.0.2","port":7001,"weight":1.0,"healthy":true,"enabled":true,"ephemeral":true,"clusterName":"DEFAULT","serviceName":"DEFAULT_GROUP@@jeecg-system","metadata":{"preserved.register.source":"SPRING_CLOUD"},"instanceHeartBeatTimeOut":15000,"instanceHeartBeatInterval":5000,"ipDeleteTimeout":30000}] 2021-10-05 21:52:01.522 [main] WARN com.netflix.config.sources.URLConfigurationSource:121 - No URLs will be polled as dynamic configuration sources. 2021-10-05 21:52:01.522 [main] INFO com.netflix.config.sources.URLConfigurationSource:122 - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 2021-10-05 21:52:01.525 [main] WARN com.netflix.config.sources.URLConfigurationSource:121 - No URLs will be polled as dynamic configuration sources. 2021-10-05 21:52:01.526 [main] INFO com.netflix.config.sources.URLConfigurationSource:122 - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 2021-10-05 21:52:02.889 [main] INFO c.a.c.s.gateway.scg.SentinelSCGAutoConfiguration:144 - [Sentinel SpringCloudGateway] register SentinelGatewayFilter with order: -2147483648 2021-10-05 21:52:03.110 [main] INFO o.s.b.actuate.endpoint.web.EndpointLinksResolver:58 - Exposing 21 endpoint(s) beneath base path '/actuator' 2021-10-05 21:52:03.183 [main] INFO c.a.c.s.gateway.scg.SentinelSCGAutoConfiguration:134 - [Sentinel SpringCloudGateway] register SentinelGatewayBlockExceptionHandler 2021-10-05 21:52:04.615 [main] INFO o.s.boot.web.embedded.netty.NettyWebServer:109 - Netty started on port(s): 9999 2021-10-05 21:52:06.182 [main] INFO com.alibaba.nacos.client.naming:81 - [BEAT] adding beat: BeatInfo{port=9999, ip='192.168.0.2', weight=1.0, serviceName='DEFAULT_GROUP@@jeecg-gateway', cluster='DEFAULT', metadata={preserved.register.source=SPRING_CLOUD}, scheduled=false, period=5000, stopped=false} to beat map. 2021-10-05 21:52:06.183 [main] INFO com.alibaba.nacos.client.naming:223 - [REGISTER-SERVICE] public registering service DEFAULT_GROUP@@jeecg-gateway with instance: Instance{instanceId='null', ip='192.168.0.2', port=9999, weight=1.0, healthy=true, enabled=true, ephemeral=true, clusterName='DEFAULT', serviceName='null', metadata={preserved.register.source=SPRING_CLOUD}} 2021-10-05 21:52:06.186 [main] INFO c.a.cloud.nacos.registry.NacosServiceRegistry:71 - nacos registry, DEFAULT_GROUP jeecg-gateway 192.168.0.2:9999 register finished 2021-10-05 21:52:06.401 [main] INFO org.jeecg.JeecgGatewayApplication:61 - Started JeecgGatewayApplication in 12.123 seconds (JVM running for 13.387) 2021-10-05 21:52:06.402 [main] INFO org.jeecg.loader.DynamicRouteLoader:70 - 初始化路由，dataType：nacos 2021-10-05 21:52:06.479 [main] INFO com.alibaba.nacos.client.config.impl.ClientWorker:262 - [fixed-192.168.0.2_8848] [subscribe] jeecg-gateway-router.json+DEFAULT_GROUP 2021-10-05 21:52:06.479 [main] INFO com.alibaba.nacos.client.config.impl.CacheData:93 - [fixed-192.168.0.2_8848] [add-listener] ok, tenant=, dataId=jeecg-gateway-router.json, group=DEFAULT_GROUP, cnt=1 2021-10-05 21:52:06.482 [main] INFO com.alibaba.nacos.client.config.impl.ClientWorker:262 - [fixed-192.168.0.2_8848] [subscribe] jeecg.yaml+DEFAULT_GROUP 2021-10-05 21:52:06.482 [main] INFO com.alibaba.nacos.client.config.impl.CacheData:93 - [fixed-192.168.0.2_8848] [add-listener] ok, tenant=, dataId=jeecg.yaml, group=DEFAULT_GROUP, cnt=1 2021-10-05 21:52:06.482 [main] INFO com.alibaba.nacos.client.config.impl.ClientWorker:262 - [fixed-192.168.0.2_8848] [subscribe] jeecg+DEFAULT_GROUP 2021-10-05 21:52:06.482 [main] INFO com.alibaba.nacos.client.config.impl.CacheData:93 - [fixed-192.168.0.2_8848] [add-listener] ok, tenant=, dataId=jeecg, group=DEFAULT_GROUP, cnt=1
日志已经打印，初始化路由，dataType：nacos，于是从这里继续排查。
找到代码中的这个日志输出位置。
@PostConstruct public void init() { String dataType = GatewayRoutersConfiguration.DATA_TYPE; log.info("初始化路由，dataType："+ dataType); if (RouterDataType.nacos.toString().endsWith(dataType)) { loadRoutesByNacos(); } //从数据库加载路由 if (RouterDataType.database.toString().endsWith(dataType)) { loadRoutesByRedis(); } }
进入loadRoutesByNacos这个方法。
/** * 从nacos中读取路由配置 * * @return */ private void loadRoutesByNacos() { List<RouteDefinition> routes = Lists.newArrayList(); configService = createConfigService(); if (configService == null) { log.warn("initConfigService fail"); } try { String configInfo = configService.getConfig(GatewayRoutersConfiguration.DATA_ID, GatewayRoutersConfiguration.ROUTE_GROUP, GatewayRoutersConfiguration.DEFAULT_TIMEOUT); if (StringUtils.isNotBlank(configInfo)) { log.info("获取网关当前配置:\r\n{}", configInfo); routes = JSON.parseArray(configInfo, RouteDefinition.class); } } catch (NacosException e) { log.error("初始化网关路由时发生错误", e); e.printStackTrace(); } for (RouteDefinition definition : routes) { log.info("update route : {}", definition.toString()); dynamicRouteService.add(definition); } this.publisher.publishEvent(new RefreshRoutesEvent(this)); dynamicRouteByNacosListener(GatewayRoutersConfiguration.DATA_ID, GatewayRoutersConfiguration.ROUTE_GROUP); }
走到标红的地方，再往下走就是空了，所以问题基本定位到这一行，开始检查三个参数。
第一个DATA_ID，就发现了这行代码，通过配置获取data-id之后，他这里又进行了一次处理，拼接了“.json”，坑人！！！。
@Value("${jeecg.route.config.data-id:#{null}}") public void setRouteDataId(String dataId) { DATA_ID = dataId + ".json"; }
敲黑板了！！！我是这样配的，以前没用过nacos，以为这个dataId是data ID+配置格式（也就是后缀），结果啪啪打脸了，想的太多了，后台找的是jeecg-gateway-router.json，咱们配的没有.json这个后缀，所以肯定找不到咯！！！
于是使用克隆，克隆时data ID加上.json后缀就可以了，完美解决问题！！！
以下总结了这次排查问题的步骤流程图。
