Maven导入依赖包

<plugin>
               <artifactId>maven-compiler-plugin</artifactId>                                                               
               <configuration>                   
                    <source>1.7</source>                                       
                    <target>1.7</target>
                    <encoding>UTF-8</encoding> 
                    <compilerArguments>            
                       <extdirs>src\main\webapp\WEB-INF\lib</extdirs> 
                    </compilerArguments>
               </configuration>
</plugin>