maven设置默认JDK版本

安装目录下的conf/setting.xml中profiles标签下  

<profile>  

    <id>jdk-1.7</id>  

    <activation>  

        <activeByDefault>true</activeByDefault>  

        <jdk>1.7</jdk>  

    </activation>  

    <properties>  

        <maven.compiler.source>1.7</maven.compiler.source>  

        <maven.compiler.target>1.7</maven.compiler.target>  

        <maven.compiler.compilerVersion>1.7</maven.compiler.compilerVersion>  

    </properties>   

</profile>