java.lang.NoClassDefFoundError:使用log4j velocity自定义布局
我正在使用velocity为log4j附加器编写一个自定义布局，但是我无法让它运行
错误如下：
org/apache/commons/collections/ExtendedProperties at org.apache.velocity.runtime.RuntimeInstance.(RuntimeInstance.java:183) at org.apache.velocity.app.VelocityEngine.(VelocityEngine.java:60) at nz.ac.massey.cs.sdc.assign1.s06013597.VelocityLayout.(VelocityLayout.java:16) at nz.ac.massey.cs.sdc.assign1.s06013597.VelocityLayoutTest.test(VelocityLayoutTest.java:36) at
java.lang.NoClassDefFoundError：java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native方法) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)在org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)在org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)在org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)在org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)在org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)在org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)在org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)在org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)在org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)在org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)在org.junit.runners.ParentRunner.run(ParentRunner.java:363)在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)在org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)原因: org.apache.commons.collections.ExtendedProperties at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190) at java.lang.ClassNotFoundException ... 27更多
这是我的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>assign251_2</groupId>
<artifactId>s06013597</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>s06013597</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.8.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.2</version>
<executions>
<execution>
<id>prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>report</id>
<phase>site</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.2</version>
<reportSets>
<reportSet>
<reports>
<report>report</report>
</reports>
</reportSet>
</reportSets>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jdepend-maven-plugin</artifactId>
<version>2.0</version>
</plugin>
</plugins>
</reporting>
</project>回答 1
Stack Overflow用户
发布于 2018-10-22 07:50:30
您的代码运行正常，并且您的测试在我的机器上通过。您应该重新导入maven依赖项，和/或从.m2文件夹中删除apache/commons/集合目录。
https://stackoverflow.com/questions/52920756
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