play framework tutorial 1

创建一个项目

1. console方式 activator new
2. idea方式 new activator

创建一个简单的service，注入到controller中

package services;

trait GreetingService {
    def greeting(): String
}

实现类

package services;

class RealGreetingService extends GreetingService {
    @Override
    def greeting():String = {
        "bonjour"
    }
}

将service 注入到controller, 关键字@injector

package controllers;

import javax.inject._
import play.api._
import play.api.mvc._
import services.RealGreetingService

class Application @Inject() extends Controller {



    val greetingService = new RealGreetingService

    def index =  Action{
        Ok(views.html.index(greetingService.greeting()))
    }

}