<plugin>
    <artifactId>maven-compiler-plugin</artifactId>                                                               
    <configuration>                   
        <source>1.8</source>                                       
        <target>1.8</target>
        <encoding>UTF-8</encoding> 
        <compilerArguments>            
            <extdirs>src\main\webapp\WEB-INF\lib</extdirs> 
            <verbose /> 
            <bootclasspath>${java.home}\lib\rt.jar;${java.home}\lib\jce.jar</bootclasspath>
        </compilerArguments>
    </configuration>
</plugin>