Spring Boot单元测试报错java.lang.IllegalStateException: Could not load TestContextBootstrapper [null]

一：运行test类方法时候报错

报错
java.lang.IllegalStateException: Could not load TestContextBootstrapper [null]. Specify @BootstrapWith's 'value' attribute or make the default bootstrapper class available.at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:147)at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:122)at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:151)at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<init>(SpringJUnit4ClassRunner.java:142)at org.springframework.test.context.junit4.SpringRunner.<init>(SpringRunner.java:49)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:423)at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:36)at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49)at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: java.lang.NoClassDefFoundError: org/springframework/util/ConcurrentLruCacheat org.springframework.test.context.TestContextAnnotationUtils.<clinit>(TestContextAnnotationUtils.java:74)at org.springframework.test.context.BootstrapUtils.resolveExplicitTestContextBootstrapper(BootstrapUtils.java:157)at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:130)... 19 more
Caused by: java.lang.ClassNotFoundException: org.springframework.util.ConcurrentLruCacheat java.net.URLClassLoader.findClass(URLClassLoader.java:382)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)... 22 more

二：分析原因，发现版本不一致