微服务重大升级说明（暂时只升级后台3.4.0）

-升级Spring Cloud Alibaba 2021.0.1.0，使用 spring.config.import 方式引入nacos配置
-拆分jeecg-boot-starter出来，使用独立项目维护

jeecg-boot/jeecg-cloud-module/jeecg-demo-cloud-start/src/main/java/JeecgDemoCloudApplication.java

@@ -0,0 +1,35 @@
+package org.jeecg;
+
+import org.jeecg.common.base.BaseMap;
+import org.jeecg.common.constant.GlobalConstants;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.data.redis.core.RedisTemplate;
+
+@SpringBootApplication
+@EnableFeignClients
+public class JeecgDemoCloudApplication implements CommandLineRunner {
+    @Autowired
+    private RedisTemplate<String, Object> redisTemplate;
+
+    public static void main(String[] args) {
+        SpringApplication.run(JeecgDemoCloudApplication.class, args);
+    }
+
+    /**
+     * 启动的时候，触发下gateway网关刷新
+     *
+     * 解决： 先启动gateway后启动服务，Swagger接口文档访问不通的问题
+     * @param args
+     */
+    @Override
+    public void run(String... args) {
+        BaseMap params = new BaseMap();
+        params.put(GlobalConstants.HANDLER_NAME, GlobalConstants.LODER_ROUDER_HANDLER);
+        //刷新网关
+        redisTemplate.convertAndSend(GlobalConstants.REDIS_TOPIC_NAME, params);
+    }
+}