概述
在进行junit测试的时候,导入junit-4.12.jar,运行报错:
java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
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:33)
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:36)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestMethodReference.<init>(JUnit4TestMethodReference.java:25)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:54)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 26 more
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
使用发现总是报java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing这样的错误,上网查了一下,一般的解决方案是,换一个低一点的版本就好了。还有人说,是缺少hamcrest的包。去官网又看了一下,结果发现这样一段话:
junit.jar
: Includes the Hamcrest classes. The simple all-in-one solution to get started quickly.Starting with version 4.11, Hamcrest is no longer included in this jar.junit-dep.jar
: Only includes the JUnit classes but not Hamcrest. Lets you use a different Hamcrest version.
注意黑色加下划线的部分。说明4.1.1中没有hamcrest包了,不知道作者是怎么想的。
最好的解决方法是:
使用是导入包的方案:junit.jar + hamcrest-core.jar + hamcrest-library.jar
或者是:junit-dep.ajr+hancrest-all.jar
这两种导入方法虽然尽量避免了导入重复的包,但使用时还是遇到了冲突。查看包中各类和文档后发现有些类(例如:断言is())同时出现在了org.hamcrest.Mathchers和org.hamcrest.core中,则在用到时候引入的时候需要注意。
我的解决方法:
把jar包换成junit-4.10.jar,
运行成功!
最后
以上就是大方乌龟为你收集整理的Junit运行时,报错:Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing的全部内容,希望文章能够帮你解决Junit运行时,报错:Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing所遇到的程序开发问题。
如果觉得靠谱客网站的内容还不错,欢迎将靠谱客网站推荐给程序员好友。
发表评论 取消回复