Maven环境搭建以及建立Maven项目

1.maven下载地址http://maven.apache.org/download.cgi

2.下载后直接解压，存放路径自己决定，我是放在C:\Program Files\Java路径下。

3.配置maven环境：我的电脑->属性->高级系统设置->新建环境变量：MAVEN_HOME ， 变量值为刚解压的maven路径，我的是:C:\Program Files\Java\apache-maven-3.5.0。再在Path变量中加上:%MAVEN_HOME%\bin;

注意:配置Maven时，环境变量里面一定要存在JAVA_HOME,即要配置好JDk的环境。

4.windows+r键输入cmd,打开dos命令，输入mvn -v 进行测试

5.Eclipse配置Maven。Window->Preferences->Maven->Installations->Add->Directory 选择刚解压的Maven的路径，点击Finish，然后将它选为默认。

6.更改本地仓库的地址：conf/settings.xml------><localRepository>。在刚解压的maven中的conf/settings.xml中修改。加上 <localRepository>节点，其中路径自己决定。

7.回到Eclispe中，打开Window->Preferences->Maven->User Settings->Global Settings选择到上一步修改的那个settings.xml文件，点击OK即可。

项目报如下错误的解决办法

Description Resource Path Location Type
Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:3.6.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.6.1 from/to central (https://repo.maven.apache.org/maven2): Received fatal alert: protocol_version pom.xml /crm9 line 1 Maven Configuration Problem

找到Maven本地仓库的目录即C:\Users\Administrator\.m2\repository

删除C:\Users\Administrator\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin下的所有文件

然后右击项目选择【Maven】->【Update Project】

发现重新生成后

C:\Users\Administrator\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin下的文件带.lastUpdated 说明文件没有下载成功。

这时需要配置Maven的setting

打开Maven的安装目录E:\WebGIS\apache-maven-3.6.1-bin\apache-maven-3.6.1\conf\settings.xml

编辑setting.xml文件

  <mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
     -->
     
     <mirror>
            <id>alimaven-central</id>
            <mirrorOf>central</mirrorOf>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
        </mirror>
        <mirror>
            <id>jboss-public-repository-group</id>
            <mirrorOf>central</mirrorOf>
            <name>JBoss Public Repository Group</name>
            <url>http://repository.jboss.org/nexus/content/groups/public</url>
        </mirror>
  </mirrors>

删除C:\Users\Administrator\.m2\repository\org\apache\maven\plugins\maven-compiler-plugin下的所有文件

然后右击项目选择【Maven】->【Update Project】