Support print content

spring-cloud-alibaba-examples/nacos-example/nacos-config-preference-example/src/main/resources/application.yml

@@ -15,7 +15,10 @@ spring:
       - optional:nacos:test2.yml?preference=local
   profiles:
     active: dev
-
+logging:
+  level:
+    # print content
+    org.springframework.boot.context.config: debug
 ---
 spring:
   config:

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/configdata/NacosConfigDataLoader.java

@@ -153,6 +153,9 @@ public class NacosConfigDataLoader implements ConfigDataLoader<NacosConfigDataRe
 			log.warn(String.format("[Nacos Config] config[dataId=%s, group=%s] is empty",
 					dataId, group));
 		}
+		log.debug(
+				String.format("[Nacos Config] config[dataId=%s, group=%s] content: \n%s",
+						dataId, group, config));
 	}
 
 	protected <T> T getBean(ConfigDataLoaderContext context, Class<T> type) {