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

@cheatsheetSection
Dependency injection configuration
@cheatsheetIndex 9
@description
`import {provide} from 'angular2/angular2';`

@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.