1. ng g component <component-name>
    2.   // 例如：ng g component components/MovieItem
    1. //app.module.ts
    2. import { MovieItemComponent } from './components/movie-item/movie-item.component';
    3. @NgModule({
    4.   /* 配置(声明)当前项目运行依赖的组件 */
    5.   declarations: [
    6.     AppComponent,
    7.     MovieItemComponent
    8.   ],
    9. })
    1. // app.component.html
    2. <app-movie-item></app-movie-item>