Scala多重继承及AOP

package traitandclass

/**
  * Created by zhen on 2018/8/23.
  */
class Human {
  println("Human")
}
trait Teacher extends Human{
  println("Teacher")
  def teach
}
trait Player extends Human{
  println("Player")
  def play = {println("I'm playing games!")}
}
// 继承Human类，混入Teacher和Player特质
class GameTeacher extends Human with Teacher with Player{
  override def teach = {println("I'm teach students how to play games!")}
}

//AOP
trait Action{
  def doAction
}
trait BeforeAfter extends Action{
  abstract override def doAction{
    println("Initial...")
    super.doAction
    println("Destroyed")
  }
}
class Work extends Action{
  override def doAction = println("Working...")
}
object Test{
  def main(args: Array[String]) {
    val gameTeacher = new GameTeacher
    gameTeacher.play
    gameTeacher.teach
    val overrideTeacher = new Human with Teacher with Player{
      override def teach = {println("I'm teach students how to play games!")}
    }
    overrideTeacher.play
    overrideTeacher.teach
    //测试AOP,混入BeforeAfter
    val work = new Work with BeforeAfter
    work.doAction
  }
}

结果：