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：