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深入详解Maven中的settings.xml文件配置

作者:有梦想的攻城狮

settings.xml是Maven的核心配置文件之一,用于全局配置Maven的行为,本文将为大家详细介绍一下settings.xml文件的配置元素和配置示例,希望对大家有所帮助

settings.xml是Maven的核心配置文件之一,用于全局配置Maven的行为。它通常位于~/.m2/目录下(用户级配置)或$M2_HOME/conf/目录下(全局配置)。用户级配置会覆盖全局配置。

基本结构

<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">
  <!-- 配置内容 -->
</settings>

主要配置元素详解

1. 本地仓库配置 (localRepository)

<localRepository>/path/to/local/repo</localRepository>

2. 交互模式配置 (interactiveMode)

<interactiveMode>true</interactiveMode>

3. 离线模式配置 (offline)

<offline>false</offline>

4. 代理配置 (proxies)

<proxies>
  <proxy>
    <id>example-proxy</id>
    <active>true</active>
    <protocol>http</protocol>
    <host>proxy.example.com</host>
    <port>8080</port>
    <username>proxyuser</username>
    <password>proxypass</password>
    <nonProxyHosts>localhost|*.example.com</nonProxyHosts>
  </proxy>
</proxies>

5. 服务器认证配置 (servers)

<servers>
  <server>
    <id>deployment-repo</id>
    <username>deploy-user</username>
    <password>deploy-pass</password>
    <!-- 可选:私钥路径 -->
    <privateKey>/path/to/private/key</privateKey>
    <!-- 可选:私钥密码 -->
    <passphrase>optional-passphrase</passphrase>
  </server>
</servers>

6. 镜像配置 (mirrors)

<mirrors>
  <mirror>
    <id>aliyun-maven</id>
    <name>Aliyun Maven Mirror</name>
    <url>https://maven.aliyun.com/repository/public</url>
    <mirrorOf>central</mirrorOf>
  </mirror>
</mirrors>

7. 配置文件激活 (profiles)

<profiles>
  <profile>
    <id>jdk-11</id>
    <activation>
      <activeByDefault>true</activeByDefault>
      <jdk>11</jdk>
    </activation>
    <properties>
      <maven.compiler.source>11</maven.compiler.source>
      <maven.compiler.target>11</maven.compiler.target>
    </properties>
  </profile>
</profiles>

8. 激活的配置文件 (activeProfiles)

<activeProfiles>
  <activeProfile>jdk-11</activeProfile>
  <activeProfile>artifactory</activeProfile>
</activeProfiles>

常用配置示例

配置阿里云镜像

<mirrors>
  <mirror>
    <id>aliyunmaven</id>
    <name>阿里云公共仓库</name>
    <url>https://maven.aliyun.com/repository/public</url>
    <mirrorOf>central</mirrorOf>
  </mirror>
  <mirror>
    <id>aliyun-google</id>
    <name>阿里云Google镜像</name>
    <url>https://maven.aliyun.com/repository/google</url>
    <mirrorOf>google</mirrorOf>
  </mirror>
</mirrors>

配置JDK 11环境

<profiles>
  <profile>
    <id>jdk-11</id>
    <activation>
      <activeByDefault>true</activeByDefault>
      <jdk>11</jdk>
    </activation>
    <properties>
      <maven.compiler.source>11</maven.compiler.source>
      <maven.compiler.target>11</maven.compiler.target>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
  </profile>
</profiles>

配置Nexus私 服

<servers>
  <server>
    <id>nexus-releases</id>
    <username>deploy</username>
    <password>deploy123</password>
  </server>
  <server>
    <id>nexus-snapshots</id>
    <username>deploy</username>
    <password>deploy123</password>
  </server>
</servers>

<profiles>
  <profile>
    <id>nexus</id>
    <repositories>
      <repository>
        <id>nexus</id>
        <url>http://nexus.example.com/repository/maven-public/</url>
        <releases><enabled>true</enabled></releases>
        <snapshots><enabled>true</enabled></snapshots>
      </repository>
    </repositories>
    <pluginRepositories>
      <pluginRepository>
        <id>nexus</id>
        <url>http://nexus.example.com/repository/maven-public/</url>
        <releases><enabled>true</enabled></releases>
        <snapshots><enabled>true</enabled></snapshots>
      </pluginRepository>
    </pluginRepositories>
  </profile>
</profiles>

<activeProfiles>
  <activeProfile>nexus</activeProfile>
</activeProfiles>

注意事项

通过合理配置settings.xml文件,可以大大提高Maven项目的构建效率和管理便利性。

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