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- trait Logger {
- def log (msg : String) }
- trait Auth {
- auth : Logger => //self-type限定,使用Auth必须混入logger的实现,达到依赖注入的效果。
- def act(msg : String) {
- log(msg) //Logger的方法
- }
- }
- object DI extends Auth with Logger {
- override def log(msg : String) = println(msg);//具体实现
- }
- object Dependency_Injection {
-
- def main(args: Array[String]) {
- DI.act("I hope you'll like it")
- }
-
- }
来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/28912557/viewspace-1985103/,如需转载,请注明出处,否则将追究法律责任。
转载于:http://blog.itpub.net/28912557/viewspace-1985103/