java.lang.IllegalStateException: Could not load TestContextBootstrapper [null]. Specify @BootstrapWi

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:143)    at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:105)    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:152)    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<init>(SpringJUnit4ClassRunner.java:143)    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 com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49)    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:498)    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)Caused by: java.lang.NoSuchMethodError: org.springframework.core.annotation.AnnotatedElementUtils.findAllMergedAnnotations(Ljava/lang/reflect/AnnotatedElement;Ljava/lang/Class;)Ljava/util/Set;    at org.springframework.test.context.BootstrapUtils.resolveExplicitTestContextBootstrapper(BootstrapUtils.java:150)    at org.springframework.test.context.BootstrapUtils.resolveTestContextBootstrapper(BootstrapUtils.java:126)    ... 23 more

错误原因：
在使用spring-test插件执行单元测试时，需要注意的是spring-webmvc的版本应该与spring-test的版本一致，否则在执行junit测试时就会出现“Java.lang.IllegalStateException: