一、前言
最近小编在学习springcloud的项目知识，初出茅庐，跟着视频敲，发现不对劲。视频出的时间太早了，导致和现在的SpringBoot版本不一样，这是个头疼的问题，一个不小心就版本不兼容。击退你的学习信心的往往不是复杂的技术和业务，而是简简单单的环境版本问题。下面跟着小编一起解决问题吧！！
二、报错信息(省略部分)
代码语言：javascript复制Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans]: Factory method 'configurationPropertiesBeans' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.10.jar:5.3.10]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.10.jar:5.3.10]
... 34 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
at org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration.configurationPropertiesBeans(ConfigurationPropertiesRebinderAutoConfiguration.java:56) ~[spring-cloud-context-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1b4f1aed.CGLIB$configurationPropertiesBeans$2(<generated>) ~[spring-cloud-context-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1b4f1aed$$FastClassBySpringCGLIB$$92bb4cd3.invoke(<generated>) ~[spring-cloud-context-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.3.10.jar:5.3.10]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-5.3.10.jar:5.3.10]
at org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1b4f1aed.configurationPropertiesBeans(<generated>) ~[spring-cloud-context-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.10.jar:5.3.10]
... 35 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_121]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_121]
... 46 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:53071', transport: 'socket'
Process finished with exit code 1三、解决问题
不难发现是因为Springboot和SpringCloud版本不兼容，我们打开：--->Spring Cloud官网，找到对应的版本对照，果然官网不会骗人哈，这样就可以解决问题了。大家跟着自己的版本进行对照选择！！
这里不是很详细，我们可以去Github上看详细版的：--->==springboot与springcloud详细对照信息==
小编的是根据视频的springboot版本是==2.1.8==，所以对应==Greenwich.SR6==
四、总结
找了这么久恍然发现，一定要看官网，不然你要走好多弯路。
Q.E.D.
