maven编译，使用WEB-INFO/lib下的Jar包

修改pom.xm 增加

<plugin>    <groupId>org.apache.maven.plugins</groupId>    <artifactId>maven-compiler-plugin</artifactId>    <version>3.1</version>    <configuration>        <source>1.7</source>        <target>1.7</target>        <encoding>UTF-8</encoding>        <compilerArguments>            <verbose />            <bootclasspath>${env.JAVA_HOME}/jre/lib/rt.jar</bootclasspath>            <extdirs>${project.basedir}/src/main/webapp/WEB-INF/lib</extdirs>        </compilerArguments>    </configuration></plugin>