命令：
mvn help:effective-settings
输出内容：
<settings xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.1.0 http://maven.apache.org/xsd/settings-1.1.0.xsd"> <localRepository xmlns="http://maven.apache.org/SETTINGS/1.1.0">/data/maven/repository</localRepository> <mirrors xmlns="http://maven.apache.org/SETTINGS/1.1.0"> <mirror> <mirrorOf>*</mirrorOf> <name>Nexus aliyun</name> <url>http://maven.aliyun.com/nexus/content/groups/public</url> <id>nexus-aliyun</id> </mirror> </mirrors> <profiles xmlns="http://maven.apache.org/SETTINGS/1.1.0"> <profile> <activation> <activeByDefault>true</activeByDefault> <jdk>1.8</jdk> </activation> <properties> <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <id>jdk18</id> </profile> </profiles> <pluginGroups xmlns="http://maven.apache.org/SETTINGS/1.1.0"> <pluginGroup>org.apache.maven.plugins</pluginGroup> <pluginGroup>org.codehaus.mojo</pluginGroup> </pluginGroups> </settings>
