Maven依赖、继承（高级）

依赖范围
http://c.biancheng.net/maven2/dependency-delivery.html

依赖调解
http://c.biancheng.net/maven2/dependency-delivery.html

排除依赖
http://c.biancheng.net/maven2/exclusion-option.html

可选依赖
http://c.biancheng.net/maven2/exclusion-option.html

依赖管理（dependencyManagement）
http://c.biancheng.net/maven2/dependency-management.html

maven继承
http://c.biancheng.net/maven2/inheritance.html