maven tips

文档参见：http://maven.apache.org/ref/3.6.3/

settings.xml

This is a reference for the user-specific configuration for Maven.

Includes things that should not be distributed with the pom.xml file, such as developer identity, along with local settings, like proxy information.

The default location for the settings file is ~/.m2/settings.xml

$HOME/.m2/settings.xml默认不存在，需要自己创建，可以先拷贝全局的settings.xml 参见${M2_HOME}/conf/settings.xml

测试macOS系统可以通过如下方式获得${M2_HOME}，位于/usr/local/Cellar/maven/3.6.2/libexec

mvn -v

Apache Maven 3.6.2 (40f52333136460af0dc0d7232c0dc0bcf0d9e117; 2019-08-27T23:06:16+08:00)
Maven home: /usr/local/Cellar/maven/3.6.2/libexec
Java version: 13, vendor: AdoptOpenJDK, runtime: /Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home
Default locale: zh_CN_#Hans, platform encoding: UTF-8
OS name: "mac os x", version: "10.14.6", arch: "x86_64", family: "mac"