问题：

在安卓、java、Scala中，总是要添加一些第三方的库。在“pom.xml"添加如下：

<dependency><groupId>com.loopj.android.http</groupId><artifactId>android-async-http</artifactId><version>1.3.2</version><type>jar</type><scope>system</scope><systemPath>${project.basedir}/libs/android-async-http-1.3.2.jar</systemPath></dependency>

运行时，就会出现错误：

[WARNING] Some problems were encountered while building the effective model for **apk:1.0
[WARNING] 'dependencies.dependency.systemPath' for com.loopj.android.http:android-async-http:jar should not point at files within the project directory, ${project.basedir}/libs/android-async-http-1.3.2.jar will be unresolvable by dependent projects @ line 36, column 2

官方解决办法：

Guide to installing 3rd party JARs

··· mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id>
-DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging> ···

官方推荐另外一种办法

使用 Apache Maven Install Plugin

<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-install-plugin</artifactId><version>2.5.2</version><executions><execution><id>install-external</id><phase>clean</phase><configuration><file>${basedir}/lib/mylib-core-0.0.1.jar</file><repositoryLayout>default</repositoryLayout><groupId>com.mylib</groupId><artifactId>mylib-core</artifactId><version>0.0.1</version><packaging>jar</packaging><generatePom>true</generatePom></configuration><goals><goal>install-file</goal></goals></execution></executions>
</plugin>

注意：你要在mvn install 之前使用 mvn clean