这对我来说是最干净的解决方案

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

export class MyComponent {
  constructor(
    private route: ActivatedRoute
  ) {}

  ngOnInit() {
    const firstParam: string = this.route.snapshot.queryParamMap.get('firstParamKey');
    const secondParam: string = this.route.snapshot.queryParamMap.get('secondParamKey');
  }
}

它对我的作用是:

constructor(private route: ActivatedRoute) {}

ngOnInit()
{
    this.route.queryParams.subscribe(map => map);
    this.route.snapshot.queryParams; 
}

如何在angular2中从url获取查询参数?

在Angular 5中，查询参数是通过订阅this.route.queryParams来访问的(注意，后面的Angular版本推荐queryParamMap，也可以查看其他答案)。

例如:/应用程序吗?param1 = hallo&param2 = 123

param1: string;
param2: string;
constructor(private route: ActivatedRoute) {
    console.log('Called Constructor');
    this.route.queryParams.subscribe(params => {
        this.param1 = params['param1'];
        this.param2 = params['param2'];
    });
}

然而，路径变量是由this.route.snapshot.params访问的

操作:param1 / param1 param2 /: param2

param1: string;
param2: string;
constructor(private route: ActivatedRoute) {
    this.param1 = this.route.snapshot.params.param1;
    this.param2 = this.route.snapshot.params.param2;
}

如果你没有使用Angular的router try, querystring。安装它

npm install --save querystring

对你的项目。在您的组件中执行如下操作

import * as qs from 'querystring';
...
ngOnInit() {
   const params = qs.parse(window.location.search.substring(1));
   ...
}

子字符串(1)是必要的，因为如果你有这样的'/mypage?Foo =bar'则键名为? Foo

简单的解决方案

 // in routing file
       {
            path: 'checkout/:cartId/:addressId',
            loadChildren: () => import('./pages/checkout/checkout.module').then(m => m.CheckoutPageModule)
          },

    // in Component file

            import { Router, ActivatedRoute } from '@angular/router';

                 constructor(
                      private _Router: ActivatedRoute
                  ) { }

                  ngOnInit() {
                    this.cartId = this._Router.snapshot.params.cartId;
                    this.addressId = this._Router.snapshot.params.addressId;
                    console.log(this.addressId, "addressId")
                    console.log(this.cartId, "cartId")
                  }

查询和路径参数(Angular 8)

url，如https://myapp.com/user/666/read?age=23使用

import { combineLatest } from 'rxjs';
// ...

combineLatest( [this.route.paramMap, this.route.queryParamMap] )
  .subscribe( ([pathParams, queryParams]) => {
    let userId = pathParams.get('userId');    // =666
    let age    = queryParams.get('age');      // =23
    // ...
  })

更新

如果你使用this.router.navigate([someUrl]);你的查询参数被嵌入到someUrl字符串中，然后angular对URL进行编码，你会得到类似https://myapp.com/user/666/read%3Fage%323的东西——以上解决方案会给出错误的结果(queryParams将为空，路径参数可以粘在最后一个路径参数上，如果它在路径端)。在这种情况下，改变导航的方式

this.router.navigateByUrl(someUrl);