java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMake

最近在用Spring Boot 2.1.4做项目的时候，写完单元测试运行，抛出了如下的错误

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
    at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:74) ~[mockito-core-2.23.4.jar:na]
    at com.sun.proxy.$Proxy75.getHandler(Unknown Source) ~[na:na]
    at org.mockito.internal.util.MockUtil.isMock(MockUtil.java:81) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.util.DefaultMockingDetails.isMock(DefaultMockingDetails.java:32) ~[mockito-core-2.23.4.jar:na]
    at org.springframework.boot.test.mock.mockito.MockReset.get(MockReset.java:106) ~[spring-boot-test-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener.resetMocks(ResetMocksTestExecutionListener.java:84) ~[spring-boot-test-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener.resetMocks(ResetMocksTestExecutionListener.java:70) ~[spring-boot-test-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener.beforeTestMethod(ResetMocksTestExecutionListener.java:57) ~[spring-boot-test-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:291) ~[spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) [junit-rt.jar:na]
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) [junit-rt.jar:na]
Caused by: java.lang.NoClassDefFoundError: net/bytebuddy/dynamic/loading/ClassInjector$UsingReflection
    at org.mockito.internal.creation.bytebuddy.SubclassInjectionLoader.(SubclassInjectionLoader.java:28) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.(SubclassByteBuddyMockMaker.java:33) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.(ByteBuddyMockMaker.java:21) ~[mockito-core-2.23.4.jar:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_131]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_131]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_131]
    at java.lang.Class.newInstance(Class.java:442) ~[na:1.8.0_131]
    at org.mockito.internal.configuration.plugins.DefaultMockitoPlugins.create(DefaultMockitoPlugins.java:66) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.configuration.plugins.DefaultMockitoPlugins.getDefaultPlugin(DefaultMockitoPlugins.java:43) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:67) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:44) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.configuration.plugins.PluginRegistry.(PluginRegistry.java:21) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.configuration.plugins.Plugins.(Plugins.java:18) ~[mockito-core-2.23.4.jar:na]
    at org.mockito.internal.util.MockUtil.(MockUtil.java:24) ~[mockito-core-2.23.4.jar:na]
    ... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_131]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_131]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_131]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_131]
    ... 41 common frames omitted

其中有一个关键的点，就是org.mockito.plugins.MockMaker这个，这个我并没有引入，为啥还报错呢？打开External Libraries库查看，果不其然有个十分相似的包org.mockito:mockito-core:2.23.4，看来应该是Spring Boot自动引入的mockito核心依赖项，如下

既然问题出在这，那砸门就去看看为何如此。搜索maven库中的mockito，

https://mvnrepository.com/artifact/org.mockito/mockito-core/2.23.4

可以看到其中有个版本是1.9.3

而项目中实际用到的是1.9.12，如下

1.9.12为最新版本，貌似并不支持。

于是返回prom文件，只需要重新定义该依赖即可。遂在porm文件下新增如下

   net.bytebuddy
   byte-buddy
   1.9.3