angular-docs-cn/modules/angular2/docs/cheatsheet/dependency-injection.md

@cheatsheetSection Dependency injection configuration @cheatsheetIndex 9 @description {@target js ts}import {provide} from 'angular2/angular2';{@endtarget} {@target dart}import 'package:angular2/angular2.dart';{@endtarget}

@cheatsheetItem syntax: provide(MyService, {useClass: MyMockService})|provide|useClass description: Sets or overrides the provider for MyService to the MyMockService class.

@cheatsheetItem syntax: provide(MyService, {useFactory: myFactory})|provide|useFactory description: Sets or overrides the provider for MyService to the myFactory factory function.

@cheatsheetItem syntax: provide(MyValue, {useValue: 41})|provide|useValue description: Sets or overrides the provider for MyValue to the value 41.