# 下载

> 参考：
* [Apache Maven  安装说明](https://maven.apache.org/install.html)
* [Apache Maven 最新版本](https://maven.apache.org/download.cgi)
* [Apache Maven 历史版本详情](https://maven.apache.org/docs/history.html)
* [Apache Maven 历史版本下载](https://archive.apache.org/dist/maven/maven-3/)

下载 apache-maven-3.x.x-bin.zip 

# 安装

2. 解压

2. 追加环境变量path

   `;MAVEN_HOME/bin`

   > 不用再设置  M2_HOME 或 MAVEN_HOME 了

3. CMD命令行下 `mvn -v` 测试

# 使用

## 无网络下使用 Maven 

1. 本地仓库一定要存在需要的jar包

2. 设置本地仓库

   ```xml
   <settings>
   	...
       <localRepository>E:\wokesoftware\maven-repository</localRepository>
       ...
   </settings>
   ```

3. 把镜像地址指向本地仓库

   ```xml
   <settings>
   	...
       <mirrors>
           <mirror>
               <id>central</id>
               <name>central</name>
               <!-- 将镜像地址设置为本地maven地址 -->
               <url>file://E:\wokesoftware\maven-repository</url>
               <mirrorOf>*</mirrorOf>
           </mirror>
       </mirrors>
       ...
   </settings>
   ```

> 常见问题：
>
> Failure to transfer $groupId:$artifactId:pom:$version from $centralUrl was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced。Original error: Could not transfer artifact $groupId:$artifactId:pom:$version  from/to central ($centralUrl)：repo.maven.apache.org
>
> 解决方案：有可能就是联网的问题