Junit测试出现异常：Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.commons.util.

在进行单元测试时，测试出现异常

Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.commons.util.ReflectionUtils.getDefaultClassLoader()Ljava/lang/ClassLoader;
    at org.junit.platform.launcher.core.ServiceLoaderTestEngineRegistry.loadTestEngines(ServiceLoaderTestEngineRegistry.java:30)
    at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:53)
    at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:39)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:49)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

pom.xml依赖如下

<dependencies>
    <dependency>
        <groupId>junitgroupId>
        <artifactId>junitartifactId>
        <version>4.12version>
    dependency>
    <dependency>
        <groupId>org.junit.jupitergroupId>
        <artifactId>junit-jupiter-apiartifactId>
        <version>RELEASEversion>
    dependency>
dependencies>

问题原因
错误就在pom.xml的依赖中，仔细查看控制台输出你会发现IntelliJ IDEA正在尝试使用JUnit5运行我的测试用例。

at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:39)

通过pom.xml发现，我希望使用JUnit4.12运行测试用例，我们查看pom.xml发现junit-jupiter-api这个依赖会导致这个错误。

<dependency>
    <groupId>org.junit.jupitergroupId>
    <artifactId>junit-jupiter-apiartifactId>
    <version>RELEASEversion>
dependency>

因为此模块专为JUnit5而设计 -https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api

解决方案

1、删除pom.xml中org.junit.jupiter依赖
2、Reimport All Maven Project

原文（英文）地址：https://stackoverflow.com/questions/45004453/cannot-run-tests-intellij-spring-project-error-java-lang-nosuchmethoderror