title: java.lang.NoClassDefFoundError: Could not initialize class org.mockito.internal.util.MockUtil
body: <p>I want to use testng + powermock + spring to run test code,my jar version is:</p>
  
  <pre><code>powermock = 1.6.2
  powermock-module-testng = 1.6.2 
  mockito = 1.10.19
  testng = 6.8.7
  spring = 4.1.1.RELEASE
  JDK = 1.8.0
  </code></pre>
  
  <p>And my test code as follows,and not extends AutoBaseTest, can run normal，AutoBaseTest contains
  @ContextConfiguration(locations={"/test/resources/applicationContext-test.xml"})</p>
  
  <pre><code>    @PrepareForTest({test.class}) 
  
  
    public class mockTest extends AutoBaseTest {
  
      @ObjectFactory
      public IObjectFactory getObjectFactory() {
  
          return new PowerMockObjectFactory();
      }
  
  
      @Test
      public final void test() throws Exception  {
          ......
      }
      }
  </code></pre>
  
  <p>the Error stack ：</p>
  
  <pre><code>`FAILED CONFIGURATION: @BeforeClass springTestContextBeforeTestClass
  java.lang.ExceptionInInitializerError
  at org.mockito.internal.exceptions.stacktrace.ConditionalStackTraceFilter.(ConditionalStackTraceFilter.java:17)
  at org.mockito.exceptions.base.MockitoException.filterStackTrace(MockitoException.java:41)
  at org.mockito.exceptions.base.MockitoException.(MockitoException.java:30)
  at org.mockito.exceptions.misusing.MockitoConfigurationException.(MockitoConfigurationException.java:18)
  at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:66)
  at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:24)
  at org.mockito.internal.configuration.plugins.PluginRegistry.(PluginRegistry.java:12)
  at org.mockito.internal.configuration.plugins.Plugins.(Plugins.java:11)
  at org.mockito.internal.util.MockUtil.(MockUtil.java:24)
  at org.mockito.internal.configuration.injection.scanner.MockScanner.(MockScanner.java:22)
  at org.mockito.internal.configuration.InjectingAnnotationEngine.injectMocks(InjectingAnnotationEngine.java:96)
  at org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.process(PowerMockitoInjectingAnnotationEngine.java:35)
  at org.powermock.api.extension.listener.AnnotationEnabler.injectSpiesAndInjectToSetters(AnnotationEnabler.java:60)
  at org.powermock.api.extension.listener.AnnotationEnabler.beforeTestMethod(AnnotationEnabler.java:55)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
  at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:663)
  at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:415)
  at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.injectMocksUsingAnnotationEnabler(PowerMockTestNGMethodHandler.java:75)
  at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.invoke(PowerMockTestNGMethodHandler.java:47)
  at test.java.com.sosoPay.servicetest.mockTest_$$jvstb5f_0.springTestContextBeforeTestClass(mockTest$$_jvstb5f_0.java)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
  at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564)
  at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
  at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138)
  at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:175)
  at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:107)
  at org.testng.TestRunner.privateRun(TestRunner.java:767)
  at org.testng.TestRunner.run(TestRunner.java:617)
  at org.testng.SuiteRunner.runTest(SuiteRunner.java:335)
  at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:330)
  at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
  at org.testng.SuiteRunner.run(SuiteRunner.java:240)
  at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
  at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
  at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
  at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
  at org.testng.TestNG.run(TestNG.java:1057)
  at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
  at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
  at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
  Caused by: java.lang.NullPointerException
  at org.mockito.internal.configuration.plugins.Plugins.getStackTraceCleanerProvider(Plugins.java:17)
  at org.mockito.internal.exceptions.stacktrace.StackTraceFilter.(StackTraceFilter.java:21)
  ... 48 more
  
  FAILED CONFIGURATION: @AfterMethod springTestContextAfterTestMethod(public final void test.java.com.sosoPay.servicetest.mockTest.test() throws java.lang.Exception)
  java.lang.NoClassDefFoundError: Could not initialize class org.mockito.internal.util.MockUtil
  at org.mockito.internal.configuration.injection.scanner.MockScanner.(MockScanner.java:22)
  at org.mockito.internal.configuration.InjectingAnnotationEngine.injectMocks(InjectingAnnotationEngine.java:96)
  at org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.process(PowerMockitoInjectingAnnotationEngine.java:35)
  at org.powermock.api.extension.listener.AnnotationEnabler.injectSpiesAndInjectToSetters(AnnotationEnabler.java:60)
  at org.powermock.api.extension.listener.AnnotationEnabler.beforeTestMethod(AnnotationEnabler.java:55)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
  at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:663)
  at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:415)
  at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.injectMocksUsingAnnotationEnabler(PowerMockTestNGMethodHandler.java:75)
  at org.powermock.modules.testng.internal.PowerMockTestNGMethodHandler.invoke(PowerMockTestNGMethodHandler.java:47)
  at test.java.com.sosoPay.servicetest.mockTest_$$jvstb5f_0.springTestContextAfterTestMethod(mockTest$$_jvstb5f_0.java)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
  at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564)
  at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
  at org.testng.internal.Invoker.invokeMethod(Invoker.java:786)
  at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
  at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
  at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
  at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
  at org.testng.TestRunner.privateRun(TestRunner.java:767)
  at org.testng.TestRunner.run(TestRunner.java:617)
  at org.testng.SuiteRunner.runTest(SuiteRunner.java:335)
  at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:330)
  at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
  at org.testng.SuiteRunner.run(SuiteRunner.java:240)
  at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
  at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
  at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
  at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
  at org.testng.TestNG.run(TestNG.java:1057)
  at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
  at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
  at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
  
  FAILED CONFIGURATION: @AfterClass springTestContextAfterTestClass
  java.lang.NoClassDefFoundError: Could not initialize class org.mockito.internal.util.MockUtil
  at org.mockito.internal.configuration.injection.scanner.MockScanner.(MockScanner.java:22)`
  </code></pre>