spring cloud 配置中心客户端启动遇到的问题
作者：qq_36481502
这篇文章主要介绍了spring cloud 配置中心客户端启动遇到的问题，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
spring cloud 配置中心客户端启动
先启动了配置中心，然后启动客户端，
发现打印的日志是这样的
2020-04-29 11:13:02.333 INFO 1856 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:9009/
2020-04-29 11:13:08.121 INFO 1856 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=test-config, profiles=[dev], label=master, version=3eb2b779d066af89af4ba5b7a722d2189a15ffd3, state=null
2020-04-29 11:13:08.122 INFO 1856 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #1)'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #0)'}]
2020-04-29 11:13:08.127 INFO 1856 --- [ main] c.z.c.ConfigCloudClientApplication : The following profiles are active: dev
2020-04-29 11:13:08.408 INFO 1856 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=3bad3006-6836-326e-9ae4-7b60b788ec28
2020-04-29 11:13:08.720 INFO 1856 --- [ main] c.z.c.ConfigCloudClientApplication : Started ConfigCloudClientApplication in 7.436 seconds (JVM running for 8.236)
从日志上看，已经获取到了配置中心的配置，但是呢，总感觉日志不对，怎么就没有启动的端口呢。
springcloud经常会一个模块包含另外模块，难道web模块没有被 spring-cloud-starter-config 包含？
那就加入web模块吧
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
加入之后再启动项目
2020-04-29 11:20:35.379 INFO 10060 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:9009/
2020-04-29 11:20:36.849 INFO 10060 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=test-config, profiles=[dev], label=master, version=3eb2b779d066af89af4ba5b7a722d2189a15ffd3, state=null
2020-04-29 11:20:36.850 INFO 10060 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #1)'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #0)'}]
2020-04-29 11:20:36.855 INFO 10060 --- [ main] c.z.c.ConfigCloudClientApplication : The following profiles are active: dev
2020-04-29 11:20:37.278 INFO 10060 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=21eb9db3-9e16-3c20-bd81-2c0ea23b0f12
2020-04-29 11:20:37.566 INFO 10060 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8201 (http)
2020-04-29 11:20:37.574 INFO 10060 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-04-29 11:20:37.574 INFO 10060 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.33]
2020-04-29 11:20:37.684 INFO 10060 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-04-29 11:20:37.684 INFO 10060 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 817 ms
2020-04-29 11:20:37.851 INFO 10060 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-04-29 11:20:38.200 INFO 10060 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8201 (http) with context path ''
2020-04-29 11:20:38.285 INFO 10060 --- [ main] c.z.c.ConfigCloudClientApplication : Started ConfigCloudClientApplication in 3.87 seconds (JVM running for 4.531)
果然，从配置中心拉取到了配置并成功启动了。
spring cloud配置中心客户端配置的坑
1. 出错信息如下
在启动配置中心的客户端时，报以下错误信息：
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'foo' in value "${foo}"
2. 度娘查了下，发现很多人碰到这个坑
首先我提交到git上到配置文件名称为下面两个文件
cloud-config-dev.properties cloud-config-test.properties
遵循配置中心配置文件的规则/{application}-{profile}.properties
所以在cloud-config-client端调用的时候，applcation.name应该是cloud-config，然而我在配置的时候，想当然的写成了cloud-config-client，导致出现上面的错误。
解决方法很简单，贴下client的配置如下
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。