1、${project.basedir} 是固定写法
bash
<dependency>
<groupId>alipay-sdk</groupId>
<artifactId>alipay-sdk</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>${project.basedir}/src/main/lib/alipay-sdk-java20161114120103.jar</systemPath>
</dependency>