方法一:

<build>  
   <plugins>  
       <plugin>  
           <groupId>org.apache.maven.plugins</groupId>  
              <artifactId>maven-compiler-plugin</artifactId>  
              <version>3.1</version>  
              <configuration>  
                  <source>1.8</source>  
                  <target>1.8</target>  
              </configuration>  
        </plugin>  
    </plugins>  
 </build>

方法二(推荐):

在maven配置文件settings.xml中设置

<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>

 

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