其实springBoot 整合Eureka 是比较简单 ，可是我发现很多人整合后会启动不了，我这里列出比较常见的报错的原因
报：a child container failed during start
如图下这样
这个原因是因为pom.xml 没有添加
org.springframework.cloud spring-cloud-dependencies Finchley.SR1 pom import
假如添加后依然报错：
报错原因是因为Springboot 与 SpringCloud 版本不配对
修改后就行正常运行了！最后把他们相对应的版本贴出来，可以看着相对应的springboot版本改springCloud
Spring Boot Spring Cloud
1.2.x Angel版本
1.3.x Brixton版本
1.4.x stripes Camden版本
1.5.x Dalston版本、Edgware版本
2.0.x Finchley版本
SpringCloud异常(Euruka)
Application run failed java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder
在测试Euruka作为服务注册中心的时候碰到了这个问题，错误提示如下：
"C:\Program Files\Java\jdk1.8.0_161\bin\java" -XX:TieredStopAtLevel=1 -........ com.fangxing.springcloud.eurukaserver.EurukaServerApplication 15:04:35.690 [main] DEBUG org.springframework.boot.context.logging.ClasspathLoggingApplicationListener - Application failed to start with classpath: ....... file:/D:/Program%20Files/JetBrains/IntelliJ%20IDEA%202017.3.5/lib/idea_rt.jar] 15:04:35.867 [background-preinit] DEBUG org.jboss.logging - Logging Provider: org.jboss.logging.Log4j2LoggerProvider 15:04:35.869 [background-preinit] INFO org.hibernate.validator.internal.util.Version - HV000001: Hibernate Validator 6.0.7.Final 15:04:35.884 [background-preinit] DEBUG org.hibernate.validator.internal.engine.resolver.TraversableResolvers - Cannot find javax.persistence.Persistence on classpath. Assuming non JPA 2 environment. All properties will per default be traversable. 15:04:35.890 [background-preinit] DEBUG org.hibernate.validator.internal.xml.ValidationXmlParser - Trying to load META-INF/validation.xml for XML based Validator configuration. 15:04:35.892 [background-preinit] DEBUG org.hibernate.validator.internal.xml.ResourceLoaderHelper - Trying to load META-INF/validation.xml via TCCL 15:04:35.893 [background-preinit] DEBUG org.hibernate.validator.internal.xml.ResourceLoaderHelper - Trying to load META-INF/validation.xml via Hibernate Validator's class loader 15:04:35.894 [background-preinit] DEBUG org.hibernate.validator.internal.xml.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only. 15:04:36.086 [background-preinit] DEBUG org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator - Loaded expression factory via original TCCL 15:04:36.090 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator as ValidatorFactory-scoped message interpolator. 15:04:36.090 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver. 15:04:36.090 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider. 15:04:36.090 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider. 15:04:36.090 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory. 15:04:36.404 [main] ERROR org.springframework.boot.SpringApplication - Application run failed java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.([Ljava/lang/Object;)V at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:120) at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:84) at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:62) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127) at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74) at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:351) at org.springframework.boot.SpringApplication.run(SpringApplication.java:317) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1241246) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234) at com.fangxing.springcloud.eurukaserver.EurukaServerApplication.main(EurukaServerApplication.java:16) Process finished with exit code 1
其根本原因是依赖包的版本冲突，我的这个pom.xml文件如下：
4.0.0 com.fangxing.springcloud euruka-server 0.0.1-SNAPSHOT jar euruka-server Demo project for Eureka Server org.springframework.boot spring-boot-starter-parent 2.0.0.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-web org.springframewor k.boot spring-boot-starter-test test org.springframework.cloud spring-cloud-starter-eureka-server org.springframework.cloud spring-cloud-dependencies Camden.SR3 pom import org.springframework.boot spring-boot-maven-plugin
这里用到的SpringBoot版本为2.0.0.0版本，我们调整一下版本，改用下面的pom.xml
4.0.0 com.fangxing.springcloud euruka-server 0.0.1-SNAPSHOT jar euruka-server Demo project for Eureka Server org.springframework.boot spring-boot-starter-parent 1.4.0.RELEASE UTF-8 1.8 org.springframework.cloud spring-cloud-starter-eureka-server org.springframework.boot spring-boot-starter-test test org.springframework.cloud spring-cloud-dependencies Camden.SR3 pom import org.springframework.boot spring-boot-maven-plugin
启用正常。
