Java spring的maven项目中的ClassNotFoundException

我目前正在学习springframework。我试图为springframework构建一个maven项目。当我选择“Runwith”->“maven测试”时，出现了一些错误

java.lang.IllegalStateException: Could not load CacheAwareContextLoaderDelegate [class org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
    at org.springframework.test.context.BootstrapUtils.createCacheAwareContextLoaderDelegate(BootstrapUtils.java:101)
    at org.springframework.test.context.BootstrapUtils.createBootstrapContext(BootstrapUtils.java:70)
    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 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.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:250)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
    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 org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.lang.NoClassDefFoundError: org/springframework/beans/BeanUtils
    at org.springframework.test.context.BootstrapUtils.createCacheAwareContextLoaderDelegate(BootstrapUtils.java:98)
    ... 26 more
Caused by: java.lang.ClassNotFoundException: org.springframework.beans.BeanUtils
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 27 more

我的springConfiguration类，也在src/main/soundsystem包中

public interface CompactDisc {
    void play();
}

@Component
public class SgtPeppers implements CompactDisc {
    private String title = "Sgt title";
    private String artist = "the Beatles";
    public void play() {
        // TODO Auto-generated method stub
        System.out.println("Playing " + title + " by " + artist);
    }
}

@Configuration
@ComponentScan
public class CDPlayerConfig {
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes=CDPlayerConfig.class)
public class CDPlayerTest {

    @Autowired
    private CompactDisc cd;

    @Test
    public void cdShouldNotBeNull() {
        assertNotNull(cd);
    }
}

我的测试类，在src/Test/soundsystem包中

public interface CompactDisc {
    void play();
}

@Component
public class SgtPeppers implements CompactDisc {
    private String title = "Sgt title";
    private String artist = "the Beatles";
    public void play() {
        // TODO Auto-generated method stub
        System.out.println("Playing " + title + " by " + artist);
    }
}

@Configuration
@ComponentScan
public class CDPlayerConfig {
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes=CDPlayerConfig.class)
public class CDPlayerTest {

    @Autowired
    private CompactDisc cd;

    @Test
    public void cdShouldNotBeNull() {
        assertNotNull(cd);
    }
}

---

我也遇到了类似的问题：

java.lang.NoSuchMethodError： org.springframework.beans.BeanUtils.InstanceClass

问题是“spring测试”没有使用指定的“SpringBeans”依赖项，而是使用另一个依赖项正在使用的“spring”库。

---

执行

mvn dependency:tree

查找您的依赖项。

CompactDisc实际上是Springbean吗？除此之外，很难确定您的实际问题是什么……我刚刚修改了我的问题，所有的源代码都在这里所有的mvn依赖项都在这个问题描述中（所有的spring依赖项都是4.3.1.RELEASE），当我执行

mvn依赖项：tree

，消息“BUILD SUCCESS”当我试图将SpringMaven依赖项从4.3.1.RELEASE更改为4.3.3.RELEASE时，我刚刚解决了这个问题。。。