Exception in thread “main“ java.lang.IllegalStateException: Cannot load configuration class

Exception in thread "main" java.lang.IllegalStateException: Cannot load configuration class: com.itcast.config.SpringConfiguration
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:414)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:254)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:284)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:128)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532)
	at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:88)
	at com.itcast.test.UserController.main(UserController.java:12)
Caused by: java.lang.ExceptionInInitializerError
	at org.springframework.context.annotation.ConfigurationClassEnhancer.newEnhancer(ConfigurationClassEnhancer.java:122)
	at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:110)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:403)
	... 7 more
Caused by: org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @13969fbe
	at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:464)
	at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
	at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
	at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
	at org.springframework.cglib.core.KeyFactory$Generator.create(KeyFactory.java:221)
	at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:174)
	at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:153)
	at org.springframework.cglib.proxy.Enhancer.<clinit>(Enhancer.java:73)
	... 10 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @13969fbe
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
	at org.springframework.cglib.core.ReflectUtils$1.run(ReflectUtils.java:61)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
	at org.springframework.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:52)
	at org.springframework.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:243)
	at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
	at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:329)
	... 22 more

检查代码无果，搜索csdn得到的方法一个是换回jdk1.8版本（未尝试），另一个是因为没有导入spring-core包，检查报错内容果然如此，导入5.0.5Release版本还是报错，最后导入5.3.18问题解决。

参考：spring的注解开发 Cannot load configuration class-有问必答-CSDN问答