maven dependency exclusions

<dependency>
    <!-- 子项目，被依赖的子项目必须经过maven的install安装，不然maven还是找不到！ -->
    <groupId>bgonline</groupId>
    <artifactId>foundation</artifactId>
    <version>1.0.0</version>
    <!-- 排除 -->
    <exclusions>
        <exclusion>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
        </exclusion>
    </exclusions>
</dependency>

maven repositories

<repositories>
    <repository>
        <id>central</id>
        <name>Maven Repository Switchboard</name>
        <layout>default</layout>
        <url>http://repo1.maven.org/maven2</url>
        <snapshots>
        <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>