设计模式

适配器模式

object MyAdapter {
    trait Person{
       def say(context:String): Unit
       def run():Unit
    }
    abstract class Chinese extends Person {
      override def say(context: String): Unit = {}
      override def run(): Unit = {}
    }
    class Student extends Chinese{
      override def say(context: String): Unit = {
        println(context)
      }
    }
    def main(args: Array[String]): Unit = {
      val student = new Student
      println(student.say("我是中国学生"))
    }
}

责任链模式

特质按照从右往左的顺序，依次执行特质中的方法

object MyResponsibility {
   trait QQ{
     def login(str:String): Unit ={
       println(str)
     }
   }
  trait check extends  QQ{
    override def login(str: String): Unit = {
      println("验证")
      super.login(str)
    }
  }
  trait Click extends  QQ{
    override def login(str: String): Unit = {
      println("打开")
      super.login(str)
    }
  }
  class User extends check with Click{
    override def login(str: String): Unit = {
      println("user ==>" + str)
      super.login(str)
    }
  }
  def main(args: Array[String]): Unit = {
    val user = new User
   user.login("zs")
  }
}