springcloud使用nacos做配置中心报错Could not resolve placeholder

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configController': 
Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: 
Could not resolve placeholder 'nacos.config' in value "${nacos.config}"

根据上面的错误，找了很多都说nacos上dataId名没按照$prefix-${spring.profile.active}.${file-extension}配置导致错误。

或者bootstrap.yml的file-extension没配为yml。
按照例子对比了很多次确定没有错误，结果还是报错。

最后根据启动信息，发现根本没读取到bootstrap.yml的配置（Located property source: [BootstrapPropertySource {name=‘bootstrapProperties-null,DEFAULT_GROUP’}]）

2020-08-31 10:12:36.859  WARN 9104 --- [  restartedMain] c.a.c.n.c.NacosPropertySourceBuilder     : Ignore the empty nacos configuration and get it based on dataId[null.properties] & group[DEFAULT_GROUP]
2020-08-31 10:12:36.861  INFO 9104 --- [  restartedMain] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-null.properties,DEFAULT_GROUP'}]
2020-08-31 10:12:36.867  INFO 9104 --- [  restartedMain] com.mk.NacosConfigMain                   : No active profile set, falling back to default profiles: default
2020-08-31 10:12:39.395  WARN 9104 --- [  restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'nacos.config' in value "${nacos.config}"
2020-08-31 10:12:39.398  INFO 9104 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'
2020-08-31 10:12:39.400  INFO 9104 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]

解决方法：注释了pom文件的packaing就可以了
创建子项目的时候弄错了pom.xml配置
问题原因：可能是加了packaing变为父级项目的原因，有哪位大佬懂的可以评论下……

修改后启动信息变为（{name=‘bootstrapProperties-nacos-config.yml,DEFAULT_GROUP’}, BootstrapPropertySource {name=‘bootstrapProperties-nacos-config,DEFAULT_GROUP’}]）

2020-08-31 10:19:46.260  INFO 9812 --- [  restartedMain] b.c.PropertySourceBootstrapConfiguration :
 Located property source: [BootstrapPropertySource {name='bootstrapProperties-nacos-config.yml,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-nacos-config,DEFAULT_GROUP'}]
2020-08-31 10:19:49.795  INFO 9812 --- [  restartedMain] c.a.n.client.config.impl.ClientWorker    : 
[fixed-localhost_8848] [subscribe] nacos-config+DEFAULT_GROUP
2020-08-31 10:19:49.796  INFO 9812 --- [  restartedMain] c.a.nacos.client.config.impl.CacheData   :
 [fixed-localhost_8848] [add-listener] ok, tenant=, dataId=nacos-config, group=DEFAULT_GROUP, cnt=1