maven下载后jar包存放位置修改: https://www.cnblogs.com/DuJiu/p/12421406.html
maven中没找到settings.xml文件怎么办: https:////www.cnblogs.com/DuJiu/p/12421468.html
一段代码解忧愁:
<profile>
<id>jdk-1.8</id>
<activation>
<activeByDefault>true</activeByDefault>
<jdk>1.8</jdk>
</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>
修改完后,保存后,返回编辑器,到项目右键
即可