maven中的仓库的配置与优先级

1 仓库的具体配置

1.1 settings.xml配置本地仓库

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"><!-- localRepository| The path to the local repository maven will use to store artifacts.|| Default: ${user.home}/.m2/repository<localRepository>/path/to/local/repo</localRepository>--><localRepository>D:\Program Files\apache-maven-3.6.3\conf\repository</localRepository>
</settings>

1.2 pom.xml配置的仓库

<project><repositories><repository><id>com.e-iceblue</id><name>e-iceblue</name><url>https://repo.e-iceblue.com/nexus/content/groups/public/</url></repository></repositories>
</project>

1.3 settings.xml配置mirror镜像

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"><mirrors><mirror><id>aliyun-central</id><name>aliyun-central</name><mirrorOf>central</mirrorOf><url>https://maven.aliyun.com/repository/central</url></mirror><mirror><id>aliyun-spring</id><name>aliyun-spring</name><mirrorOf>spring</mirrorOf><url>https://maven.aliyun.com/repository/spring</url></mirror><mirror><id>aliyun-spring-plugin</id><name>aliyun-spring-plugin</name><mirrorOf>spring-plugin</mirrorOf><url>https://maven.aliyun.com/repository/spring-plugin</url></mirror></mirrors>
</settings>

1.4 settings.xml配置profile仓库

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"><servers><server><id>nexus-server</id><username>uname</username><password>pwd</password></server></servers><profiles><profile><id>nexus</id><repositories><repository><id>nexus-server</id><name>Nexus Repository</name><url>https://maven.nexus.com/repository/maven-public/</url><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><!--让配置生效--><activeProfiles><activeProfile>nexus</activeProfile></activeProfiles>
</settings>

2 结论

2.1 mirror中不代理*的拉取顺序

1. settings.xml->本地仓库，如果没有则向下找
2. settings.xml->profile中的仓库，如果没有则向下找
3. pom.xml配置的仓库，如果没有则向下找
4. settings.xml->mirror中代理central的仓库

2.2 mirror中代理了*的拉取顺序

mirror中一旦代理了*，则该配置优先级最高，其他的都不会走了。
但是有一种情况除外，就是mirror中代理了central仓库，那么如果代理*的 mirror中没有，则会找代理的central仓库

1. settings.xml->本地仓库，如果没有则向下找
2. settings.xml->mirror中代理*的仓库，如果没有则向下找
3. settings.xml->mirror中代理central的仓库