修改apache-maven-3.6.0\conf\settings.xml文件
添加下面这些内容：
<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云公共仓库</name>
<url>https://maven.aliyun.com/repository/public</url>
</mirror>
<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云谷歌仓库</name>
<url>https://maven.aliyun.com/repository/google</url>
</mirror>
<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云阿帕奇仓库</name>
<url>https://maven.aliyun.com/repository/apache-snapshots</url>
</mirror>
<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云spring仓库</name>
<url>https://maven.aliyun.com/repository/spring</url>
</mirror>
<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云spring插件仓库</name>
<url>https://maven.aliyun.com/repository/spring-plugin</url>
</mirror>
<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>
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