IDEA是否会嫌导jar包麻烦吗？？？赶快来学习maven吧，冲冲冲

文章目录

maven功能
配置maven
- mvn compile 如下报错：
- 解决方案：
- 十分感谢坤爷帮助
修改本地仓库
- maven的配置文件
- 修改local_repository指定你的目录（不要使用中文目录）
仓库
- 仓库的定义
- 仓库的分类
- 仓库的使用
IDEA中设置maven
- 配置入口
- - maven项（配置当前工程的设置）
  - Maven/Runner
- maven项（配置以后新建工程的设置）
使用模版创建项目
报错解决
- 报错1
- 报错2
删除导入的jar包和modules

maven功能

maven可以管理jar文件
自动下载jar和他的文档，源代码
管理jar直接的依赖， a.jar需要b.jar ， maven会自动下载b.jar
管理你需要的jar版本
帮你编译程序，把java编译为class
帮你测试你的代码是否正确。
帮你打包文件，形成jar文件，或者war文件
帮你部署项目

配置maven

需要从maven的官网下载maven的安装包，我的版本是apache-maven-3.6.3
解压安装包，解压到一个目录，非中文目录
配置环境变量；在系统的环境变量中，指定一个M2_HOME的名称，指定它的值是maven工具安装目录，bin之前的目录M2_HOME=D:\apache-maven-3.6.3-bin\apache-maven-3.6.3
再把M2_HOME加入到path之中，在所有路径之前加入 %M2_HOME%\bin;（注意：需要配置JAVA_HOME ，指定jdk路径）
验证，新的命令行中，执行mvn -v

tree +  文件

执行mvn compile ,结果是在项目的根目录下生成target目录（结果目录），maven编译的java程序，最后的class文件都放在target目录中

默认仓库：

C:\Users\ASUS\.m2\repository

注意，执行java命令，必须在相应的包名文件路径之前

mvn compile 如下报错：

解决方案：

打开pom.xml的文件，在project标签中加上如下代码：

<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>10</maven.compiler.source><maven.compiler.target>10</maven.compiler.target>
</properties>

这里的10需要换成对应jdk版本，直接java -version

如下这种，把10全部换成1.8即可

十分感谢坤爷帮助

修改本地仓库

maven的配置文件

maven安装目录/conf/settings.xml,先备份

修改local_repository指定你的目录（不要使用中文目录）

把注释内标签移动到下面，修改标签内容即可

D:\apache-maven-3.6.3-bin\maven_repository

仓库

仓库的定义

存放maven使用的jar和我们项目使用的jar（maven使用的插件(各种jar)；项目使用的jar（第三方工具））

仓库的分类

本地仓库：个人计算机上的文件夹，存放各种jar
远程仓库：在互联网上的，使用网络才能使用的仓库（中央仓库：最权威的，所有的开发人员都共享使用的一个集中的仓库，https://repo.maven.apache.org；中央仓库的镜像：就是中央仓库的备份，在各大洲，重要的城市都是镜像；私服，在公司内部，在局域网中使用的，不是对外使用的。）

仓库的使用

maven仓库的使用不需要人为参与
开发人员需要使用mysql驱动—>maven首先查本地仓库—>私服—>镜像—>中央仓库

IDEA中设置maven

在idea中设置maven ，让idea和maven结合使用（ idea中内置了maven ，一般不使用内置的，因为用内置修改maven的设置不方便。）

配置入口

maven项（配置当前工程的设置）

配置的入口 ①：配置当前工程的设置，file--settings ---Build, Excution,Deployment--Build Tools --Maven
改之前：

               Maven Home directory: maven的安装目录

User Settings File : 就是maven安装目录conf/setting.xml配置文件
Local Repository : 本机仓库的目录位置
改之后：

Maven/Runner

VM Options : archetypeCatalog=internal
JRE: 你项目的jdk

maven项目创建时，会联网下载模版文件，比较大， VM Options使用-DarchetypeCatalog=internal，不用下载，创建maven项目速度快。（新版本的idea用-DarchetypeCatalog=internal，版本较低的用archetypeCatalog=internal）

maven项（配置以后新建工程的设置）

配置以后新建工程的设置，file--other settings--Settings for New Project

使用模版创建项目

maven-archetype-quickstart : 普通的java项目

maven-archetype-webapp : web工程

然后点击Enable-Auto-Import

报错解决

报错1

maven自动导入依赖失败

2 errorsat com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:543)at com.google.inject.internal.InternalInjectorCreator.initializeStatically(InternalInjectorCreator.java:159)at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:106)at com.google.inject.Guice.createInjector(Guice.java:87)at com.google.inject.Guice.createInjector(Guice.java:69)at com.google.inject.Guice.createInjector(Guice.java:59)at org.codehaus.plexus.DefaultPlexusContainer.addComponent(DefaultPlexusContainer.java:344)at org.codehaus.plexus.DefaultPlexusContainer.addComponent(DefaultPlexusContainer.java:332)at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.customizeComponents(Maven3ServerEmbedderImpl.java:557)at org.jetbrains.idea.maven.server.Maven3ServerEmbedderImpl.customize(Maven3ServerEmbedderImpl.java:527)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$Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.run(Thread.java:745)at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:276)at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:253)at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:162)at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)at com.sun.proxy.$Proxy198.customize(Unknown Source)at sun.reflect.GeneratedMethodAccessor1581.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:179)at com.intellij.execution.rmi.RemoteUtil.access$300(RemoteUtil.java:39)at com.intellij.execution.rmi.RemoteUtil$2$1$1.compute(RemoteUtil.java:160)at com.intellij.openapi.util.ClassLoaderUtil.runWithClassLoader(ClassLoaderUtil.java:66)at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:231)at com.intellij.execution.rmi.RemoteUtil$2$1.invoke(RemoteUtil.java:157)at com.sun.proxy.$Proxy198.customize(Unknown Source)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.doCustomize(MavenEmbedderWrapper.java:96)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.lambda$customizeForResolve$1(MavenEmbedderWrapper.java:69)at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:76)at org.jetbrains.idea.maven.server.MavenEmbedderWrapper.customizeForResolve(MavenEmbedderWrapper.java:68)at org.jetbrains.idea.maven.project.MavenProjectsTree.resolve(MavenProjectsTree.java:1264)at org.jetbrains.idea.maven.project.MavenProjectsProcessorResolvingTask.perform(MavenProjectsProcessorResolvingTask.java:45)at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:134)at org.jetbrains.idea.maven.project.MavenProjectsProcessor.access$000(MavenProjectsProcessor.java:32)at org.jetbrains.idea.maven.project.MavenProjectsProcessor$2.run(MavenProjectsProcessor.java:109)at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$5(MavenUtil.java:451)at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:314)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)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:745)
2021-06-10 22:17:13,176 [8188941]  ERROR -      #org.jetbrains.idea.maven - IntelliJ IDEA 2018.3.2  Build #IU-183.4886.37
2021-06-10 22:17:13,176 [8188941]  ERROR -      #org.jetbrains.idea.maven - JDK: 1.8.0_152-release; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o
2021-06-10 22:17:13,176 [8188941]  ERROR -      #org.jetbrains.idea.maven - OS: Windows 10
2021-06-10 22:19:58,325 [8354090]   INFO - ide.actions.ShowFilePathAction -
Exit code 1

这个报错是属于maven版本问题，不兼容，回退到3.6.1重新安装配置问题解决

报错2

2019-09-24 15:54:53,177 [79997751]  ERROR -      #org.jetbrains.idea.maven - IntelliJ IDEA 2018.3  Build #IU-183.4284.148
2019-09-24 15:54:53,177 [79997751]  ERROR -      #org.jetbrains.idea.maven - JDK: 1.8.0_152-release; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o
2019-09-24 15:54:53,177 [79997751]  ERROR -      #org.jetbrains.idea.maven - OS: Windows 10
2019-09-24 15:54:54,060 [79998634]   INFO - .diagnostic.PerformanceWatcher - Reindexing refreshed files took 1279ms; general responsiveness: ok; EDT responsiveness: ok
2019-09-24 15:54:54,187 [79998761]   INFO - g.FileBasedIndexProjectHandler - Reindexing refreshed files: 0 to update, calculated in 0ms
2019-09-24 15:55:31,582 [80036156]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:02:39,691 [80464265]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:02:44,386 [80468960]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:03:24,203 [80508777]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:03:31,740 [80516314]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:05:31,587 [80636161]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:12:39,637 [81064211]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:12:44,454 [81069028]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:13:24,083 [81108657]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:13:31,845 [81116419]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:15:31,596 [81236170]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:22:39,644 [81664218]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:22:44,358 [81668932]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:23:24,097 [81708671]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:23:31,756 [81716330]  ERROR - .httpclient.HttpMethodDirector - Received redirect response 302 but no location header
2019-09-24 16:24:34,611 [81779185]   INFO - atisticsWhiteListGroupsService - Request failed with status code 404
com.intellij.util.io.HttpRequests$HttpStatusException: Request failed with status code 404. Status=404, Url=https://download.jetbrains.com/fus/whitelist/bear/groups/IU.jsonat com.intellij.util.io.HttpRequests.throwHttpStatusError(HttpRequests.java:643)at com.intellij.util.io.HttpRequests.openConnection(HttpRequests.java:624)at com.intellij.util.io.HttpRequests.access$300(HttpRequests.java:59)at com.intellij.util.io.HttpRequests$RequestImpl.getConnection(HttpRequests.java:378)at com.intellij.util.io.HttpRequests$RequestImpl.getInputStream(HttpRequests.java:387)at com.intellij.util.io.HttpRequests$RequestImpl.readString(HttpRequests.java:442)at com.intellij.util.io.RequestBuilder.lambda$readString$3(RequestBuilder.java:85)at com.intellij.util.io.HttpRequests.doProcess(HttpRequests.java:523)at com.intellij.util.io.HttpRequests.process(HttpRequests.java:499)at com.intellij.util.io.HttpRequests.access$100(HttpRequests.java:59)at com.intellij.util.io.HttpRequests$RequestBuilderImpl.connect(HttpRequests.java:352)at com.intellij.util.io.RequestBuilder.readString(RequestBuilder.java:85)at com.intellij.internal.statistic.service.fus.FUStatisticsWhiteListGroupsService.getApprovedGroups(FUStatisticsWhiteListGroupsService.java:46)at com.intellij.internal.statistic.service.fus.FUStatisticsSettingsService.getApprovedGroups(FUStatisticsSettingsService.java:43)at com.intellij.internal.statistic.service.fus.collectors.FUStatisticsPersistence.persistProjectUsages(FUStatisticsPersistence.java:49)at com.intellij.internal.statistic.updater.StatisticsJobsScheduler$2.lambda$projectOpened$0(StatisticsJobsScheduler.java:110)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:230)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.run(Thread.java:745)

修改 MAVEN的 Importing和Runner的JDK一致：

删除导入的jar包和modules

右上角

点击减号即可