maven中设置jdk默认编译版本为1.8

 setting.xml中增加以下配置

<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>   
    </profile>