1. 【enforcer首页】http://maven.apache.org/enforcer/maven-enforcer-plugin/enforce-mojo.html
2. 【内置规则】http://maven.apache.org/enforcer/enforcer-rules/index.html
3. 【codehaus扩展规则】http://www.mojohaus.org/extra-enforcer-rules/

1. 不允许出现SNAPSHOT。
2. 制定GAV规则。
3. 不允许出现重复jar包

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-enforcer-plugin</artifactId>
    <executions>
        <execution>
            <goals>
                <goal>enforce</goal>
            </goals>
            <configuration>
                <fail>true</fail>
                <failFast>true</failFast>
                <rules>
                    <requireReleaseDeps>
                        <failWhenParentIsSnapshot>false</failWhenParentIsSnapshot>
                        <message>No Snapshots Allowed!</message>
                        <excludes>
                            <exclude>com.imooc.harder:*</exclude>
                        </excludes>
                    </requireReleaseDeps>
                    <bannedDependencies>
                        <searchTransitive>true</searchTransitive>
                        <message>Dependecy Check Failed!</message>
                        <excludes>
                            <exclude>org.springframework:spring-beans:(,4.1.2.RELEASE]</exclude>
                            <exclude>commons-logging:commons-logging</exclude>
                        </excludes>
                    </bannedDependencies>
                    <banDuplicateClasses>
                        <ignoreClasses>
                            <ignoreClass>javax.*</ignoreClass>
                            <ignoreClass>org.apache.commons.logging.*</ignoreClass>
                            <ignoreClass>org.apache.shiro.*</ignoreClass>
                            <ignoreClass>org.objectweb.asm.*</ignoreClass>
                            <ignoreClass>shade.org.apache.commons.*</ignoreClass>
                            <ignoreClass>org.apache.commons.*</ignoreClass>
                            <ignoreClass>zander.com.google.common.*</ignoreClass>
                            <ignoreClass>zander.com.google.thirdparty.*</ignoreClass>
                            <ignoreClass>com.facebook.fb303.*</ignoreClass>
                            <ignoreClass>scribe.thrift.*</ignoreClass>
                            <ignoreClass>org.apache.thrift.*</ignoreClass>
                            <ignoreClass>org.aspectj.*</ignoreClass>
                        </ignoreClasses>
                        <findAllDuplicates>true</findAllDuplicates>
                    </banDuplicateClasses>
                </rules>
            </configuration>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>extra-enforcer-rules</artifactId>
            <version>1.0-beta-6</version>
        </dependency>
    </dependencies>
</plugin>