如何解决spring cloud配置中心客户端启动遇到的问题

如何解决spring cloud配置中心客户端启动遇到的问题，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

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=null2020-04-29 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: dev2020-04-29 11:13:08.408  INFO 1856 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=3bad3006-6836-326e-9ae4-7b60b788ec282020-04-29 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

             org.springframework.boot            spring-boot-starter-web 

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=null2020-04-29 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: dev2020-04-29 11:20:37.278  INFO 10060 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=21eb9db3-9e16-3c20-bd81-2c0ea23b0f122020-04-29 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 WebApplicationContext2020-04-29 11:20:37.684  INFO 10060 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 817 ms2020-04-29 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.propertiescloud-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

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