使用引导程序的Angular 4下拉菜单

我使用引导程序无法在下拉菜单中以角度4的方式工作。我遵循了此处找到的一些不同的响应，但是没有任何效果。主主菜单项显示，但没有出现下拉菜单。无论如何，我也不会记录任何错误。我已经包含了我所拥有代码的最新版本。任何帮助，将不胜感激。

这是应用程序组件的HTML

<app-header ></app-header>
<div class="container-fluid">
    <div class="row" >
        <div class="col-md-12">
            <router-outlet></router-outlet>
        </div>
    </div>
</div>

这是应用程序标题html代码。

<nav class="navbar navbar-default">
    <div class="container-fluid">
        <div class="navbar-header">
            <a routerLink="/" class="navbar-brand">NEMO</a>
        </div>

        <div class="collapse navbar-collapse navbar-ex1-collapse" >

            <ul class="nav navbar-nav">
                <li routerLinkActive="active"><a routerLink="/file-restore" *ngIf="! newHireService.isNewHireMode">File Restore</a></li>

                <li class="menu-item dropdown"  >
                    <a style="cursor: pointer;" class="dropdown-toggle" data-toggle="dropdown" >Reports<span class="caret" ></span></a>
                    <ul class="dropdown-menu">
                        <li class="menu-item dropdown dropdown-submenu">
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Level 1</a>
                            <ul class="dropdown-menu">
                                <li class="menu-item ">
                                    <a href="#">Link 1</a>
                                </li>
                                <li class="menu-item dropdown dropdown-submenu">
                                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Level 2</a>
                                    <ul class="dropdown-menu">
                                        <li>
                                            <a href="#">Link 3</a>
                                        </li>
                                    </ul>
                                </li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>

        </div>
    </div>
</nav>

我的.angular-cli.json文件具有以下内容：

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "project": {
    "name": "nemo-ui"
  },
  "apps": [
    {
      "root": "src",
      "outDir": "dist",
      "assets": [
        "assets",
        "favicon.ico"
      ],
      "index": "index.html",
      "main": "main.ts",
      "polyfills": "polyfills.ts",
      "test": "test.ts",
      "tsconfig": "tsconfig.app.json",
      "testTsconfig": "tsconfig.spec.json",
      "prefix": "app",
      "styles": [
        "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "../node_modules/font-awesome/css/font-awesome.css",
            "../node_modules/jquery/dist/jquery.min.js",
        "styles.css"
       ],
      "scripts": [],
      "environmentSource": "environments/environment.ts",
      "environments": {
        "dev": "environments/environment.ts",
        "prod": "environments/environment.prod.ts"
      }
    }
  ],
  "e2e": {
    "protractor": {
      "config": "./protractor.conf.js"
    }
  },
  "lint": [
    {
      "project": "src/tsconfig.app.json"
    },
    {
      "project": "src/tsconfig.spec.json"
    },
    {
      "project": "e2e/tsconfig.e2e.json"
    }
  ],
  "test": {
    "karma": {
      "config": "./karma.conf.js"
    }
  },
  "defaults": {
    "styleExt": "css",
    "component": {}
  }
}