控制台错误信息如下：

APPLICATION FAILED TO START

Description:

The bean ‘eurekaRegistration’, defined in class path resource
[org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$EurekaClientConfiguration.class],couldnotberegistered.Abeanwiththatnamehasalreadybeendefinedinclasspathresource[org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaC
lientConfiguration.class] and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow
-bean-definition-overriding=true

***************************
APPLICATION FAILED TO START
***************************
 
Description:
 
The bean 'eurekaRegistration', defined in class path resource
 [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$EurekaClientConfigu
ration.class], could not be registered. A bean with that name has already been defined in
 class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaC
lientConfiguration.class] and overriding is disabled.
 
Action:
 
Consider renaming one of the beans or enabling overriding by setting spring.main.allow
-bean-definition-overriding=true

错误分析：
当时我的第一反应是按照控制台说的加上这句话允许重复注册，然后报错更严重了，没有解决问题

然后我网上看了一下，说是由于springboot和springcloud版本冲突导致的，但是在这个新创建的工程中我只引入了cloud的版本管理，用的springboot也是这里自带的的怎么会冲突呢

解决办法：
错误信息是已经注册过了，还有一个重复的导致的，所以我认为是我在子工程引入eureka-server的时候引入错误了

原来引入的pom文件

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-netflix-eureka-server</artifactId>
</dependency>

修改为：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>