ng2-bootstrap在Angular 2中不起作用(‘alert’不是已知元素:)

我通过以下方式在运行Angular 2.0.1的项目上安装了ng2-bootstrap：

npm install ng2-bootstrap --save

我设置了这样的项目：

//systemjs.config.js
    (function (global) {
    System.config({
        paths: {
            // paths serve as alias
            'npm:': 'node_modules/'
        },
        // map tells the System loader where to look for things
        map: {
            'moment': 'node_modules/moment/moment.js',
            'ng2-bootstrap/ng2-bootstrap': 'node_modules/ng2-bootstrap/bundles/ng2-bootstrap.umd.js',
            // our app is within the app folder
            app: 'app',
            // angular bundles

和：

// app.module.ts
import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpModule } from '@angular/http';
import { Ng2BootstrapModule } from 'ng2-bootstrap/ng2-bootstrap';
import { AppComponent }  from './app.component';
import { ClientModule } from './client/client.module';

@NgModule({
    imports: [
       Ng2BootstrapModule

    ],
    declarations: [
       AppComponent
    ],
    schemas: [ CUSTOM_ELEMENTS_SCHEMA ],
    providers: [
        NotificationService,
        { provide: LocationStrategy, useClass: HashLocationStrategy }
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }

和：

// client.module.ts
import { Ng2BootstrapModule } from 'ng2-bootstrap';

@NgModule({
    imports: [
        Ng2BootstrapModule
    ],
    declarations: [

    ],
    providers: [

    ]
})
export class ClientModule { }

最后：

// client-info.component.ts
import { Component, OnInit, OnDestroy } from '@angular/core';
import { AlertComponent } from 'ng2-bootstrap/ng2-bootstrap';

@Component({
    selector: 'client-info',
    template: `
    <div >
        <alert type="success">hello</alert>
    </div>
    `,
    styleUrls: ['app/client/client.css']
})

export class ClientInfoComponent {
    constructor() {

    }

   ngOnInit(): void { }

   ngOnDestroy(): void {

    }
}

但在浏览网站时,我收到以下错误：

Unhandled Promise rejection: Template parse errors:
‘alert’ is not a known element:
1. If ‘alert’ is an Angular component, then verify that it is part of this >module.
2. If ‘alert’ is a Web Component then add “CUSTOM_ELEMENTS_SCHEMA” to the >’@NgModule.schemas’ of this component to suppress this message. (“

[ERROR ->]hello

我显然在这里做错了但是什么？

app.module.ts应该是这样的.它对我很有帮助.

// app.module.ts
import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpModule } from '@angular/http';
import { Ng2BootstrapModule } from 'ng2-bootstrap/ng2-bootstrap';
import { ClientModule } from './client/client.module';
import { AlertModule } from 'ng2-bootstrap/components/alert';

@NgModule({
    imports: [
       Ng2BootstrapModule,
       AlertModule

    ],
    declarations: [
       AppComponent
    ],
    schemas: [ CUSTOM_ELEMENTS_SCHEMA ],
    providers: [
        NotificationService,
        { provide: LocationStrategy, useClass: HashLocationStrategy }
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }

并将client-info.component.ts更改为此

// client-info.component.ts
    import { Component, OnInit, OnDestroy } from '@angular/core';
    import { AlertModule } from 'ng2-bootstrap/components/alert';


    @Component({
        selector: 'client-info',
        template: `
        <div >
            <alert type="success">hello</alert>
        </div>
        `,
        styleUrls: ['app/client/client.css']
    })

    export class ClientInfoComponent {
        constructor() {

        }

       ngOnInit(): void { }

       ngOnDestroy(): void {

        }

}