存放jar包位置也就是本地仓库位置

<localRepository>G:\Repository</localRepository>

配置远程仓库地址

		<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>

配置jdk版本

	 <profile>
            <id>jdk18</id>
            <activation>
                <jdk>1.8</jdk>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <maven.compiler.source>1.8</maven.compiler.source>
                <maven.compiler.target>1.8</maven.compiler.target>
                <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
            </properties>
        </profile>

完整配置

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <!-- 本地仓库的位置 -->
    <localRepository>G:\Repository</localRepository>
    <!-- Apache Maven 配置 -->
    <pluginGroups/>
    <proxies/>
    <!-- 私服发布的用户名密码
    <servers><server><id>releases</id><username>账号</username><password>密码</password></server><server><id>snapshots</id><username>账号</username><password>密码</password></server></servers>
 -->
    <!-- 阿里云镜像 -->
    <mirrors>
        <mirror>
            <id>alimaven</id>
            <name>aliyun maven</name>
            <!-- https://maven.aliyun.com/repository/public/ -->
            <url>https://maven.aliyun.com/repository/public</url>
            <mirrorOf>central</mirrorOf>
        </mirror>
    </mirrors>
    <!-- 配置: java8, 先从阿里云下载, 没有再去私服下载  -->
    <!-- 20190929 hepengju 测试结果: 影响下载顺序的是profiles标签的配置顺序(后面配置的ali仓库先下载), 而不是activeProfiles的顺序 -->
    <profiles>
        <!-- 全局JDK1.8配置 -->
        <profile>
            <id>jdk1.8</id>
            <activation>
                <activeByDefault>true</activeByDefault>
                <jdk>1.8</jdk>
            </activation>
            <properties>
                <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
                <maven.compiler.source>1.8</maven.compiler.source>
                <maven.compiler.target>1.8</maven.compiler.target>
                <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
            </properties>
        </profile>
        <!-- Nexus私服配置: 第三方jar包下载, 比如oracle的jdbc驱动等 
        <profile><id>dev</id><repositories><repository><id>nexus</id><url>http://nexus.xxxx.cn:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled></snapshots></repository></repositories><pluginRepositories><pluginRepository><id>maven-public</id><name>Public Repositories</name><url>http://nexus.xxxx.cn:8081/repository/maven-public/</url></pluginRepository></pluginRepositories></profile>
-->
        <!-- 阿里云配置: 提高国内的jar包下载速度 -->
        <profile>
            <id>ali</id>
            <repositories>
                <repository>
                    <id>alimaven</id>
                    <name>aliyun maven</name>
                    <url>https://maven.aliyun.com/repository/public</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>true</enabled>
                    </snapshots>
                </repository>
            </repositories>
            <pluginRepositories>
                <pluginRepository>
                    <id>alimaven</id>
                    <name>aliyun maven</name>
                    <url>https://maven.aliyun.com/repository/public</url>
                </pluginRepository>
            </pluginRepositories>
        </profile>
    </profiles>
    <!-- 激活配置 -->
    <activeProfiles>
        <activeProfile>jdk1.8</activeProfile>
        <activeProfile>dev</activeProfile>
        <activeProfile>ali</activeProfile>
    </activeProfiles>
</settings>