0.背景
使用IDEA搭建SpringBoot项目，搭建完成后开始报错，报错信息如下：
java.lang.RuntimeException: java.lang.RuntimeException: org.codehaus.plexus.component.repository.exception.ComponentLookupException: com.google.inject.ProvisionException: Unable to provision, see the following errors:
1) Error injecting constructor, java.lang.NoSuchMethodError: org.apache.maven.model.validation.DefaultModelValidator: method <init>()V not found
at org.jetbrains.idea.maven.server.embedder.CustomModelValidator.<init>(Unknown Source)
while locating org.jetbrains.idea.maven.server.embedder.CustomModelValidator
at ClassRealm[maven.ext, parent: ClassRealm[plexus.core, parent: null]] (via modules: org.eclipse.sisu.wire.WireModule -> org.eclipse.sisu.plexus.PlexusBindingModule)
while locating org.apache.maven.model.validation.ModelValidator annotated with @com.google.inject.name.Named(value=ide)
1 error
role: org.apache.maven.model.validation.ModelValidator
roleHint: ide
at org.jetbrains.idea.maven.server.Maven3XServerEmbedder.getComponent(Maven3XServerEmbedder.java:489)
at org.jetbrains.idea.maven.server.Maven3XServerEmbedder.customizeComponents(Maven3XServerEmbedder.java:578)
at org.jetbrains.idea.maven.server.Maven3XServerEmbedder.customize(Maven3XServerEmbedder.java:546)
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 sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:346)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
at java.rmi/sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:303)
at java.rmi/sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:279)
at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:164)
at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:217)
at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:162)
at com.sun.proxy.$Proxy316.customize(Unknown Source)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:155)
at com.intellij.execution.rmi.RemoteUtil.access$400(RemoteUtil.java:25)
at com.intellij.execution.rmi.RemoteUtil$1.lambda$invoke$0(RemoteUtil.java:139)
at com.intellij.openapi.util.ClassLoaderUtil.computeWithClassLoader(ClassLoaderUtil.java:31)
at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:207)
at com.intellij.execution.rmi.RemoteUtil$1.invoke(RemoteUtil.java:139)
at com.sun.proxy.$Proxy316.customize(Unknown Source)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.doCustomize(MavenEmbedderWrapper.java:93)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.onWrappeeCreated(MavenEmbedderWrapper.java:46)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.getOrCreateWrappee(RemoteObjectWrapper.java:42)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.doCustomize(MavenEmbedderWrapper.java:93)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.lambda$customizeForResolve$1(MavenEmbedderWrapper.java:66)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:76)
at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.customizeForResolve(MavenEmbedderWrapper.java:65)
at org.jetbrains.idea.maven.project.MavenProjectResolver.resolve(MavenProjectResolver.java:77)
at org.jetbrains.idea.maven.project.MavenProjectsProcessorResolvingTask.perform(MavenProjectsProcessorResolvingTask.java:45)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:145)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.access$000(MavenProjectsProcessor.java:36)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor$1.run(MavenProjectsProcessor.java:114)
at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$5(MavenUtil.java:494)
at com.intellij.util.RunnableCallable.call(RunnableCallable.java:20)
at com.intellij.util.RunnableCallable.call(RunnableCallable.java:11)
at com.intellij.openapi.application.impl.ApplicationImpl$1.call(ApplicationImpl.java:268)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: org.codehaus.plexus.component.repository.exception.ComponentLookupException: com.google.inject.ProvisionException: Unable to provision, see the following errors:
1) Error injecting constructor, java.lang.NoSuchMethodError: org.apache.maven.model.validation.DefaultModelValidator: method <init>()V not found
at org.jetbrains.idea.maven.server.embedder.CustomModelValidator.<init>(Unknown Source)
while locating org.jetbrains.idea.maven.server.embedder.CustomModelValidator
at ClassRealm[maven.ext, parent: ClassRealm[plexus.core, parent: null]] (via modules: org.eclipse.sisu.wire.WireModule -> org.eclipse.sisu.plexus.PlexusBindingModule)
while locating org.apache.maven.model.validation.ModelValidator annotated with @com.google.inject.name.Named(value=ide)
看报错好像是maven的问题，于是用IDEA打开maven的配置，发现maven的主目录变了。
然后去更改maven主目录的时候，点击应用和确定以后，再次打开发现还是上面的地址，maven的主目录还是没有发生变化。
1.解决办法
查看你项目中是否有个 .mvn文件，如果有，找到wrapper下面的maven-wrapper.properties
就是这个文件的问题，它会导致上面不能更改maven的主目录，把这个文件删除，然后重新修改maven的主目录。
修改完毕后，重新拉取maven的依赖就行了。