在Angular应用程序中，当我们使用子路由时，有时可能会遇到"Angular router not finding child route"的问题。原因可能是我们在路由的配置中未正确配置子路由。

下面是一个示例代码，通过配置子路由，可以解决这个问题：

// app-routing.module.ts

import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router';

import { HomeComponent } from './home/home.component'; import { AboutComponent } from './about/about.component'; import { ContactComponent } from './contact/contact.component'; import { ProductsComponent } from './products/products.component'; import { ProductDetailsComponent } from './product-details/product-details.component';

const routes: Routes = [ { path: 'home', component: HomeComponent }, { path: 'about', component: AboutComponent }, { path: 'contact', component: ContactComponent }, { path: 'products', component: ProductsComponent, children: [ { path: ':id', component: ProductDetailsComponent } ] }, { path: '', redirectTo: '/home', pathMatch: 'full' }, { path: '**', redirectTo: '/home', pathMatch: 'full' } ];

@NgModule({ imports: [RouterModule.forRoot(routes)], exports: [RouterModule] }) export class AppRoutingModule { }

在上面的代码中，我们在产品路由中定义了子路由，并指定了子路由的路径。下面是产品组件和产品详情组件的示例代码：

// products.component.ts

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

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

ngOnInit() {} }

// product-details.component.ts

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

@Component({ selector: 'app-product-details', templateUrl: './product-details.component.html', styleUrls: ['./product-details.component.css'] }) export class ProductDetailsComponent implements OnInit { productId: string;

constructor(private route: ActivatedRoute) {}

ngOnInit() { this.route.params.subscribe(params => { this.productId = params['id']; }); } }

在上面的代码中，我们使用了Angular的内置ActivatedRoute服务来获取路由参数。

通过以上步骤，我们就能够正确地使用子路由，避免了"Angular router not finding child route"的问题。