<build>

    <finalName>xxx</finalName>

    <plugins>

        <plugin>

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

            <artifactId>maven-war-plugin</artifactId>

            <version>2.2</version>

            <configuration>

                <failOnMissingWebXml>false</failOnMissingWebXml>

                <overlays>

                    <overlay>

                        <groupId>com.hjz</groupId>

                        <artifactId>cas</artifactId>

                        <excludes>

                            <exclude>WEB-INF/lib</exclude>

                        </excludes>

                    </overlay>

                </overlays>

            </configuration>

        </plugin>

        <plugin>

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

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

            <version>3.6.1</version>

            <configuration>

                <source>1.8</source>

                <target>1.8</target>

                <encoding>UTF-8</encoding>

                <compilerArguments>

                    <extdirs>${project.basedir}/src/main/webapp/WEB-INF/lib</extdirs>

                </compilerArguments>

            </configuration>

        </plugin>

    </plugins>

</build>