npm install ngx-bootstrap-modal --save

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
//这种模态框只需要导入下面这两个
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
import { DetailComponent } from './detail/detail.component';
@NgModule({
 declarations: [
 AppComponent,
 DetailComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule
 ],
 providers: [],
 entryComponents: [
 DetailComponent
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

<div class="container">
 <div class="row">
 <button type="button" class="btn btn-primary" (click)="showAlert()">alert模态框</button>
 </div> 
</div>

import { Component } from '@angular/core';
import { DialogService } from "ngx-bootstrap-modal";
import { DetailComponent } from './detail/detail.component'
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService) {
 } 
 showAlert() {
  this.dialogService.addDialog(DetailComponent, { title: 'Alert title!', message: 'Alert message!!!' });
 }
}

<div class="modal-dialog">
 <div class="modal-content">
  <div class="modal-header">
   <button type="button" class="close" (click)="close()" >×</button>
   <h4 class="modal-title">{{title}}</h4>
  </div>
  <div class="modal-body">
   这是alert弹框
  </div>
  <div class="modal-footer">
   <button type="button" class="btn btn-primary" (click)="close()">取消</button>
   <button type="button" class="btn btn-default">确定</button>
  </div>
 </div>
</div>

import { Component } from '@angular/core';
import { DialogComponent, DialogService } from 'ngx-bootstrap-modal';
export interface AlertModel {
 title: string;
 message: string;
}
@Component({
 selector: 'alert',
 templateUrl: './detail.component.html',
 styleUrls: ['./detail.component.css']
})
export class DetailComponent extends DialogComponent<AlertModel, null> implements AlertModel {
 title: string;
 message: string;
 constructor(dialogService: DialogService) {
 super(dialogService);
 }
}

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
//这种模态框只需要导入下面这两个
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
import { DetailComponent } from './detail/detail.component';
@NgModule({
 declarations: [
 AppComponent,
 DetailComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule
 ],
 providers: [],
 entryComponents: [
 DetailComponent
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

<div class="container">
 <div class="row">
 <button type="button" class="btn btn-primary" (click)="showConfirm()">modal模态框</button>
 </div> 
</div>

import { Component } from '@angular/core';
import { DialogService } from "ngx-bootstrap-modal";
import { ConfirmComponent } from './confirm/confirm.component'
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService,private modalService: BsModalService) {
 }
 showConfirm() {
  this.dialogService.addDialog(ConfirmComponent, {
   title: 'Confirmation',
   message: 'bla bla'
  })
   .subscribe((isConfirmed) => {
   });
 }
}

<div class="modal-dialog">
 <div class="modal-content">
  <div class="modal-header">
   <button type="button" class="close" (click)="close()" >×</button>
   <h4 class="modal-title">{{title}}</h4>
  </div>
  <div class="modal-body">
   这是confirm弹框
  </div>
  <div class="modal-footer">
   <button type="button" class="btn btn-primary" (click)="close()">取消</button>
   <button type="button" class="btn btn-default">确定</button>
  </div>
 </div>
</div>

import { Component } from '@angular/core';
import { DialogComponent, DialogService } from 'ngx-bootstrap-modal';
export interface ConfirmModel {
 title:string;
 message:any;
}
@Component({
 selector: 'confirm',
 templateUrl: './confirm.component.html',
 styleUrls: ['./confirm.component.css']
})
export class ConfirmComponent extends DialogComponent<ConfirmModel, boolean> implements ConfirmModel {
 title: string;
 message: any;
 constructor(dialogService: DialogService) {
 super(dialogService);
 }
 confirm() {
 // on click on confirm button we set dialog result as true,
 // ten we can get dialog result from caller code
 this.close(true);
 }
 cancel() {
 this.close(false);
 }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
@NgModule({
 declarations: [
 AppComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule,
 ModalModule.forRoot()
 ],
 providers: [],
 bootstrap: [AppComponent]
})
export class AppModule { }

<div class="container">
 <div class="row">
 <button type="button" class="btn btn-default" (click)="show()">内置</button>
 </div> 
</div>

import { Component } from '@angular/core';
import { DialogService, BuiltInOptions } from "ngx-bootstrap-modal";
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService) {
 }
 show(){
  this.dialogService.show(<BuiltInOptions>{
   content: '保存成功',
   icon: 'success',
   size: 'sm',
   showCancelButton: false
  })
 }
}

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
@NgModule({
 declarations: [
 AppComponent
 ],
 imports: [
 BrowserModule,
 ModalModule.forRoot()
 ],
 providers: [],
 entryComponents: [
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

import { Component,TemplateRef } from '@angular/core';
import { BsModalService } from 'ngx-bootstrap/modal';
import { BsModalRef } from 'ngx-bootstrap/modal/modal-options.class';
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 public modalRef: BsModalRef;
 constructor(private modalService: BsModalService) {
 }
 showSecond(template: TemplateRef<any>){//传入的是一个组件
  this.modalRef = this.modalService.show(template,{class: 'modal-lg'});//在这里通过BsModalService里面的show方法把它显示出来
 };
}

<div class="container">
 <div class="row">
 <button type="button" class="btn btn-success" (click)="showSecond(Template)">第二种弹出方式</button>
 </div> 
</div>
<!--第二种弹出方法的组件-->
<template #Template>
 <div class="modal-header tips-modal-header">
 <h4 class="modal-title pull-left">第二种模态框</h4>
 <button type="button" class="close pull-right" aria-label="Close" (click)="modalRef.hide()">
  <span aria-hidden="true">×</span>
 </button>
 </div>
 <div class="modal-body tips-modal-body">
 <div class="tips-contain"><span>第二种模态框弹出方式</span></div>
 </div>
 <div class="modal-footer">
  <button type="button" class="btn btn-default" (click)="modalRef.hide()">确定</button>
  <button type="button" class="btn btn-default" (click)="modalRef.hide()">取消</button>
 </div>
</template>