angular 获取当前url

import { Component } from '@angular/core';
import { Router } from '@angular/router';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  currentUrl: string;

  constructor(private router: Router) {
    this.currentUrl = router.url;
  }
}

import { Component } from '@angular/core';
import { Location } from '@angular/common';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  currentUrl: string;

  constructor(private location: Location) {
    this.currentUrl = location.path();
  }
}

import { Component, OnInit } from '@angular/core';
import { Router, NavigationEnd } from '@angular/router';
import { filter } from 'rxjs/operators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  fullUrl: string;

  constructor(private router: Router) {}

  ngOnInit() {
    this.router.events.pipe(
      filter(event => event instanceof NavigationEnd)
    ).subscribe((event: NavigationEnd) => {
      this.fullUrl = event.urlWithParams;
    });
  }
}