Nexus私服让我们可以在企业内部从同一个私服下载Maven仓库里面的dependency和plugin.很方便，不过昨天碰到的一个问题是，有一个仓库加入到Nexus后不能，Maven工程无法通过Nexus私服下载该仓库的dependency。
这个仓库叫做：http://download.osgeo.org/webdav/geotools/
想了一个办法绕过它，通过Maven的~/.m2/settings.xml中配置两个Mirror，在遇到osgeo的时候直接使用该仓库，而在其他情况下用私服。
下面是配置：
<settings>
<servers>
<server>
<id>snapshots</id>
<username>admin</username>
<password>admin</password>
</server>
</servers>
<pluginGroups>
<pluginGroup>org.apache.maven.plugins</pluginGroup>
</pluginGroups>
<mirrors>
<mirror>
<!--This sends everything else to /public -->
<id>nexus</id>
<mirrorOf>external:*,!osgeo</mirrorOf>
<url>http://my-proxy:8080/nexus/content/groups/public</url>
</mirror>
<mirror>
<id>osgeo</id>
<mirrorOf>osgeo</mirrorOf>
<name>Open Source Geospatial Foundation Repository</name>
<url>http://download.osgeo.org/webdav/geotools/</url>
</mirror>
</mirrors>
<profiles>
<profile>
<id>nexus</id>
<!--Enable snapshots for the built in central repo to direct -->
<!--all requests to nexus via the mirror -->
<repositories>
<repository>
<id>central</id>
<url>http://central</url>
<releases><enabled>true</enabled></releases>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<url>http://central</url>
<releases><enabled>true</enabled></releases>
<snapshots><enabled>true</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
</profiles>
<activeProfiles>
<!--make the profile active all the time -->
<activeProfile>nexus</activeProfile>
</activeProfiles>
</settings>
而在maven工程里面如下配置，注意repository.id必须和mirror.id相等。
<repositories>
<repository>
<id>local repository</id>
<url>http://my-proxy:8080/nexus/content/groups/public/</url>
</repository>
<repository>
<id>osgeo</id>
<name>Open Source Geospatial Foundation Repository</name>
<url>http://download.osgeo.org/webdav/geotools/</url>
</repository>
</repositories>