[problem phenomenon]

When the springcloud system is built in the idea, a red error is prompted at runtime:

org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'configurationPropertiesBeans' defined in class path resource 
[org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: 
Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: 
Failed to introspect Class 
[org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] 
from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]

......

Caused by: java.lang.IllegalStateException: 
Failed to introspect Class 
[org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] 
from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]

......

Caused by: java.lang.NoClassDefFoundError: 
org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata

......

Caused by: java.lang.ClassNotFoundException: 
org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata

[reason]

This is a very common problem in the spring cloud system because the spring boot version is incompatible with the spring cloud version.

[solution]

The spring boot version and spring cloud version should be matched in strict accordance with the official version. Link to the official website:
https://spring.io/projects/spring-cloud

Different clouds need different boot versions, as shown in the figure:

Example of version change:

after version replacement, reload all Maven items, as shown in the figure:

If an error is still reported, re-execute the MVN clean package