【转】新建maven工程为什么jdk会是默认版本 而不是自己设置的版本？

原文链接：为什么我eclipse新建项目的时候默认的是JRE1.5？

修改Maven中conf目录里的setting.xml文件内容，加上如下内容：

<profiles>
        <!-- profile | Specifies a set of introductions to the build process, to
            be activated using one or more of the | mechanisms described above. For inheritance
            purposes, and to activate profiles via <activatedProfiles/> | or the command
            line, profiles have to have an ID that is unique. | | An encouraged best
            practice for profile identification is to use a consistent naming convention
            | for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey',
            'user-brett', etc. | This will make it more intuitive to understand what
            the set of introduced profiles is attempting | to accomplish, particularly
            when you only have a list of profile id's for debug. | | This profile example
            uses the JDK version to trigger activation, and provides a JDK-specific repo. -->
        <profile>
            <id>jdk-1.8</id>
            <activation>
                <activeByDefault>true</activeByDefault>
                <jdk>1.8</jdk>
            </activation>
            <properties>
                <maven.compiler.source>1.8</maven.compiler.source>
                <maven.compiler.target>1.8</maven.compiler.target>
                <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
            </properties>
            <repositories>
                <repository>
                    <id>nexus</id>
                    <name>local private nexus</name>
                    <url>http://maven.oschina.net/content/groups/public/</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>false</enabled>
                    </snapshots>
                </repository>
            </repositories>
            <pluginRepositories>
                <pluginRepository>
                    <id>nexus</id>
                    <name>local private nexus</name>
                    <url>http://maven.oschina.net/content/groups/public/</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>false</enabled>
                    </snapshots>
                </pluginRepository>
            </pluginRepositories>
        </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>