@angular/cli项目构建--路由2

app.module.ts update

const routes: Routes = [
  {path: '', redirectTo: '/home', pathMatch: 'full'},
  {path: 'home', component: HomeComponent},
  {path: 'login', component: LoginComponent},
  {path: '**', component: Code404Component}
];

nav-bar.compoonent.html update

<ul class="nav navbar-nav navbar-right" *ngIf="!isLogin()">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
        <li><a routerLink="/login"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right" *ngIf="isLogin()">
        <li><a href="#"><span class="glyphicon glyphicon-user"></span> {{username}}</a></li>
        <li><a (click)="loginOut()"><span class="glyphicon glyphicon-log-out"></span> LoginOut</a></li>
      </ul>

login.component.html add

<div class="container">
  <div class="main-box col-md-6 col-md-offset-3">

    <div class="panel panel-info">
      <div class="panel-heading">
        <div class="panel-title">Login</div>
      </div>

      <div style="padding:30px" class="panel-body">

        <div style="display:none" id="login-alert" class="alert alert-danger col-sm-12"></div>

        <form class="form-horizontal" role="form" #loginForm="ngForm"
              (ngSubmit)="loginForm.form.valid && login()">

          <label style="padding-bottom:10px" class="control-label">UserName</label>
          <div style="margin-bottom: 15px" class="input-group"
               [ngClass]="{'has-error': loginForm.submitted && !username.valid }">
            <span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
            <input type="text" class="form-control" name="username" placeholder="username or email"
                   [(ngModel)]="model.username" #username="ngModel" required>
            <div *ngIf="loginForm.submitted && !username.valid" class="help-block">
              Username is required
            </div>
          </div>

          <label style="padding-bottom:10px" class="control-label">Password</label>
          <div style="margin-bottom: 25px" class="input-group"
               [ngClass]="{'has-error': loginForm.submitted && !username.valid }">
            <span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span>
            <input type="password" class="form-control" name="password" placeholder="password"
                   [(ngModel)]="model.password" #password="ngModel" required>
            <div *ngIf="loginForm.submitted && !password.valid" class="help-block">
              password is required
            </div>
          </div>
          <div class="form-group">
            <button [disabled]="loading" class="btn btn-primary">Login</button>
            <img *ngIf="loading" src="data:image/gif;base64,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"
            />
          </div>
        </form>
      </div>
    </div>

  </div>
</div>

login.component.ts add

import {Component, OnInit} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {AuthenticationService} from '../authority-guard/authentication.service';

@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {

  model: any = {};
  loading = false;
  returnUrl: string;

  constructor(private activeRoute: ActivatedRoute,
              private router: Router,
              private authenticationService: AuthenticationService) {
  }

  ngOnInit() {
    this.authenticationService.loginOut();
    if (this.authenticationService.login(this.model.username, this.model.password)) {
      this.router.navigate([this.returnUrl]);
    } else {
      this.loading = false;
    }
  }

  login() {
    const isLogin = this.authenticationService.login(this.model.username, this.model.password);
    if (isLogin) {
      this.router.navigate(['/home']);
    }
  }

}

login-auth.service.ts add

import {Injectable} from '@angular/core';
import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot} from '@angular/router';
import {AuthenticationService} from '../authority-guard/authentication.service';

@Injectable()
export class LoginAuthService implements CanActivate {
  constructor(private router: Router,
              private authenticationService: AuthenticationService) {
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    // 未登陆，重定向URL到登录页面，包含返回URL参数，然后返回False
    this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});
    return !!this.authenticationService.isLogin();
  }
}

authentication.service.ts add

import {Injectable} from '@angular/core';

@Injectable()
export class AuthenticationService {

  static isLogin() {
    return localStorage.getItem('currentUser');
  }

  static login(username: string, password: string) {
    if (username === 'admin' && password === 'admin') {
      localStorage.setItem('currentUser', username);
      return true;
    }
    return false;
  }

  static loginOut() {
    localStorage.removeItem('currentUser');
  }
}