setting.xml修改如下配置：

  <profile><id>jdk-1.4</id><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>

这里示例的是jdk-1.4版本的。替换成：

    <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>