使用junit单元测试的java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing问题解决办法

超、凢脫俗 2022-06-03 10:45 148阅读 0赞

**代码如下：**

package com.lnsf.warehose.service.test;  
import java.util.List;  
import org.junit.Test;  
import org.junit.runner.RunWith;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.test.context.ContextConfiguration;  
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  
import org.springframework.test.context.transaction.TransactionConfiguration;  
import org.springframework.test.context.web.WebAppConfiguration;  
import org.springframework.transaction.annotation.Transactional;  
import com.lnsf.warehouse.entity.Makeup\_grade;  
import com.lnsf.warehouse.service.Makeup\_gradeService;  
  
/\*\*  
\* @author 农夫山泉有点甜   
\* @version 创建时间：2017年8月26日 下午4:03:49  
\* @introduction  等级类别表测试类  
\*/  
@RunWith(SpringJUnit4ClassRunner.class)   
@WebAppConfiguration   
@ContextConfiguration(locations=\{"classpath:applicationContext.xml"\})  
@TransactionConfiguration(defaultRollback = true)   
@Transactional   
public class Makeup\_gradeServiceTest \{  
@Autowired  
Makeup\_gradeService makeup\_gradeService;  
@Test  
public void test() \{  
try \{  
List<Makeup\_grade> productList=makeup\_gradeService.getAllgrade();  
System.out.println(productList);  
\} catch(Exception e)\{  
e.printStackTrace();  
\}  
\}  
\}

**在运行的时候报错。**

**用junit进行单元测试的时候，突然就出现了以下错误：**

java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10) 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 com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:44) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 25 more

**步骤一：**

出现错误的原因是使用的junit的jar包里面缺少hamcrest-core-\*.jar包，下载该jar包，导入项目，问题自然就解决了。

**步骤二：**

**如果问题还没解决，检查是否jar包导入正确。**如下：

hamcrest-core-\*.jar

junit.jar，junit-4.12.jar,  hamcrest-core-1.3jar ，（用上这个2个jar包）