在学习 JMock 的时候，执行代码抛出了如下错误信息：
Exception in thread "main" java.lang.NoClassDefFoundError: org/hamcrest/TypeSafeDiagnosingMatcher
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.jmock.internal.InvocationExpectationBuilder.createExpectationFrom(InvocationExpectationBuilder.java:88)
at org.jmock.internal.InvocationToExpectationTranslator.invoke(InvocationToExpectationTranslator.java:19)
at org.jmock.internal.FakeObjectMethods.invoke(FakeObjectMethods.java:38)
at org.jmock.lib.JavaReflectionImposteriser$1.invoke(JavaReflectionImposteriser.java:33)
at com.sun.proxy.$Proxy1.getUserInfo(Unknown Source)
at com.huangx.jmock.Client$1.<init>(Client.java:25)
at com.huangx.jmock.Client.main(Client.java:22)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.TypeSafeDiagnosingMatcher
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 19 more
解决办法：
进入到 JMock 的官网 https://jmock.org/getting-started.html ，你会发现 JMock 需要的依赖如下：
为了解决上面的问题，你需要检查自己是否引入了这些依赖。我这里遇到的问题就是没有引入 hamcrest 依赖，添加依赖如下：
<dependency> <groupId>org.hamcrest</groupId> <artifactId>hamcrest-core</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>org.hamcrest</groupId> <artifactId>hamcrest-library</artifactId> <version>1.3</version> </dependency>
