一、异常描述

关于在junit调试springmvc项目的时候报"java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing...Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing"异常错误，详情日志如下>>

	java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing@b@	at java.lang.ClassLoader.defineClass1(Native Method)@b@	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)@b@	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)@b@	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)@b@	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)@b@	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)@b@	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)@b@	at java.security.AccessController.doPrivileged(Native Method)@b@	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)@b@	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)@b@	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)@b@	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)@b@	at java.lang.Class.getDeclaredConstructors0(Native Method)@b@	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2595)@b@	at java.lang.Class.getConstructor0(Class.java:2895)@b@	at java.lang.Class.getConstructor(Class.java:1731)@b@	at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)@b@	at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)@b@	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)@b@	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)@b@	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)@b@	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)@b@	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:32)@b@	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:25)@b@	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:41)@b@	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:31)@b@	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)@b@	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)@b@	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)@b@	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)@b@Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing@b@	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)@b@	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)@b@	at java.security.AccessController.doPrivileged(Native Method)@b@	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)@b@	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)@b@	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)@b@	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)@b@	... 30 more

二、解决方法

修改pom.xml的将junit的依赖版本由3.8.1改为4.4，具体如下所示（完整的项目代码下载参见其他文章页）

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"@b@	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">@b@	<modelVersion>4.0.0</modelVersion>@b@	<groupId>com.yiibai</groupId>@b@	<artifactId>HelloSpringMVC</artifactId>@b@	<packaging>war</packaging>@b@	<version>0.0.1-SNAPSHOT</version>@b@	<name>HelloSpringMVC Maven Webapp</name>@b@	<url>http://maven.apache.org</url>@b@	<dependencies>@b@@b@		<dependency>@b@			<groupId>junit</groupId>@b@			<artifactId>junit</artifactId>@b@			<version>4.4</version>@b@			<scope>test</scope>@b@		</dependency>@b@@b@		<!-- Servlet Library -->@b@		<!-- http://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->@b@		<dependency>@b@			<groupId>javax.servlet</groupId>@b@			<artifactId>javax.servlet-api</artifactId>@b@			<version>3.1.0</version>@b@			<scope>provided</scope>@b@		</dependency>@b@@b@		<!-- Spring dependencies -->@b@		<!-- http://mvnrepository.com/artifact/org.springframework/spring-core -->@b@		<dependency>@b@			<groupId>org.springframework</groupId>@b@			<artifactId>spring-core</artifactId>@b@			<version>4.1.4.RELEASE</version>@b@		</dependency>@b@@b@		<!-- http://mvnrepository.com/artifact/org.springframework/spring-web -->@b@		<dependency>@b@			<groupId>org.springframework</groupId>@b@			<artifactId>spring-web</artifactId>@b@			<version>4.1.4.RELEASE</version>@b@		</dependency>@b@@b@		<!-- http://mvnrepository.com/artifact/org.springframework/spring-webmvc -->@b@		<dependency>@b@			<groupId>org.springframework</groupId>@b@			<artifactId>spring-webmvc</artifactId>@b@			<version>4.1.4.RELEASE</version>@b@		</dependency>@b@		@b@		<dependency>@b@			<groupId>org.springframework</groupId>@b@			<artifactId>spring-test</artifactId>@b@			<version>4.1.4.RELEASE</version>@b@		</dependency>@b@		@b@		@b@		<dependency>@b@			<groupId>org.springframework</groupId>@b@			<artifactId>spring</artifactId>@b@			<version>2.5.6.SEC03</version>@b@		</dependency>@b@		@b@		<dependency>@b@			<groupId>freemarker</groupId>@b@			  <artifactId>freemarker</artifactId>@b@			  <version>2.3.21</version>@b@		</dependency>@b@		@b@		<dependency>@b@			<groupId>org.slf4j</groupId>@b@  			<artifactId>slf4j-api</artifactId>@b@			  <version>1.6.1</version>@b@		</dependency>@b@@b@	</dependencies>@b@@b@	<build>@b@		<finalName>HelloSpringMVC</finalName>@b@		<plugins>@b@ @b@			<plugin>@b@				<groupId>org.apache.tomcat.maven</groupId>@b@				<artifactId>tomcat7-maven-plugin</artifactId>@b@				<version>2.2</version> @b@			</plugin>@b@		</plugins>@b@	</build>@b@</project>