是否可以注入与angular2的界面？

我认为这与接口上缺少的@Injectable()装饰器有关,但似乎这是不允许的.

问候.

当CoursesServiceInterface实现为接口时,TypeScript编译器会抱怨“CoursesServiceInterface找不到名称”：

import {CoursesServiceInterface} from './CoursesService.interface';
import {CoursesService} from './CoursesService.service';
import {CoursesServiceMock} from './CoursesServiceMock.service';
bootstrap(AppComponent,[
  ROUTER_PROVIDERS,GlobalService,provide(CoursesServiceInterface,{ useClass: CoursesServiceMock })
  ]);

但以CoursesServiceInterface为界面：

import {Injectable} from 'angular2/core';
import {Course} from './Course.class';
//@Injectable()
export interface CoursesServiceInterface {
    getAllCourses(): Promise<Course[]>;//{ return null; };
    getCourse(id: number): Promise<Course>;// { return null; };
    remove(id: number): Promise<{}>;// { return null; };
}

当服务是一个类时,TypeScript编译器不再抱怨：

import {Injectable} from 'angular2/core';
import {Course} from './Course.class';
@Injectable()
export class CoursesServiceInterface {  
    getAllCourses() : Promise<Course[]> { return null; };
    getCourse(id: number) :Promise<Course> { return null; };
    remove (id: number) : Promise<{}> { return null; };
}