Maven项目编译级别

方式一：pom.xml文件中配置属性：

<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>

方式二：pom.xml文件中配置插件：

<plugin>

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

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

<version>3.5.1</version>

<configuration>

<source>1.8</source>

<target>1.8</target>

<encoding>UTF-8</encoding>

</configuration>

</plugin>

方式三：settings.xml中修改配置profile：

<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>