<!-- 局部jdk配置，pom.xml中 -->

     <build>

         <plugins>

             <plugin>

                 <groupId>org.apache.maven.plugins</groupId>

                 <artifactId>maven-compiler-plugin</artifactId>

                 <configuration>

                     <source>1.8</source>

                     <target>1.8</target>

                 </configuration>

             </plugin>

         </plugins>

     </build>  

 <!-- 全局jdk配置，settings.xml -->

     <profile>

         <id>jdk18</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>