Spring单元测试抛ExceptionInInitializerError

使用了@Runwith和@ContextConfiguration两个注解来构建一个测试类

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Mybatis {
    @Autowired
    private MoviesDao moviesDao;
 
    @Test
    public void testFindAll() {
        List<Movie> movies = moviesDao.findAll();
        System.out.println(movies);
    }

运行测试项目的时候，弹出了异常

java.lang.ExceptionInInitializerError
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:29)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
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:26)
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:31)
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.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
at org.springframework.util.Assert.state(Assert.java:76)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.(SpringJUnit4ClassRunner.java:104)
… 15 more

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发现异常是 java.lang.ExceptionInInitializerError ，查了一下是静态代码块加载时出现的异常

自己写的里面也没有含静态代码块的代码，所以也没啥解决头绪

回去看异常信息，往下翻发现了这一行

Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.

噢……那就是junit版本太低了

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解决方法：将Junit依赖改成4.12即可

<!--单元测试-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

一直习惯用4.11，查阅资料才发现spring测试类的话需要的版本是junit4.12起步，果然东西还是用新的好，大意了_(:з」∠)_