十一、Maven： ~/.m2/settings.xml 之pr

配置不同环境不同配置。
比如：
dev环境、test环境、pro环境，不同环境需要配置不同的 jdbc.url

<profiles>

  <activation>
    <jdk>1.4</jdk>
  </activation>

  <repositories>
    <repository>
      <id>jdk14</id>
      <name>Repository for JDK 1.4 builds</name>
      <url>http://www.myhost.com/maven/jdk14</url>
      <layout>default</layout>
      <snapshotPolicy>always</snapshotPolicy>
    </repository>
  </repositories>
</profile>
-->

<!--
 | Here is another profile, activated by the system property 'target-env' with a value of 'dev',
 | which provides a specific path to the Tomcat instance. To use this, your plugin configuration
 | might hypothetically look like:
 |
 | ...
 | <plugin>
 |   <groupId>org.myco.myplugins</groupId>
 |   <artifactId>myplugin</artifactId>
 |
 |   <configuration>
 |     <tomcatLocation>${tomcatPath}</tomcatLocation>
 |   </configuration>
 | </plugin>
 | ...
 |
 | NOTE: If you just wanted to inject this configuration whenever someone set 'target-env' to
 |       anything, you could just leave off the <value/> inside the activation-property.
 |
<profile>
  <id>env-dev</id>

  <activation>
    <property>
      <name>target-env</name>
      <value>dev</value>
    </property>
  </activation>

  <properties>
    <tomcatPath>/path/to/tomcat/instance</tomcatPath>
  </properties>
</profile>
-->

</profiles>