注意：使用的版本是

"react": "17.0.2",

"react-dom": "17.0.2",

"react-router-dom": "5.2.0",

步骤如下：

• 1、在src目录下新建 router 文件夹

• 2、在src下新建pages文件夹，新建自己需要的路由体系

• 3、在文件夹中新建 index.js routerView.js routerConfig.js 三个js文件

index.js （ 路由入口文件 以 BrowserRouter 为例 ）

import { BrowserRouter } from "react-router-dom"
import routes from "./routerConfig";
import RouterView from "./routerView"
export default function RootRouter() {
  return (
    <BrowserRouter>
        <RouterView routes={routes}></RouterView>
    </BrowserRouter>
  )
}

routerConfig.js （根据自己的路由配置对应的路由数组）

import Index from "../pages/Index";
import Home from "../pages/Index/home";
import Classify from "../pages/Index/classify";
import Car from "../pages/Index/car";
import My from "../pages/Index/my";
import Login from "../pages/Login";

const routes = [
    {
        path: "/login",
        component: Login,
    },
    {
        path: "/index",
        component: Index,
        children: [
            {
                path: "/index/home",
                component: Home,
            },
            {
                path: "/index/classify",
                component: Classify,
            },
            {
                path: "/index/car",
                component: Car,
            },
            {
                path: "/index/my",
                component: My,
            }
        ],
    },
    {
        path: "/",
        to: "/index/home"  // 重定向
    }
]


export default routes;

routerView.js 

import { Switch, Route, Redirect } from 'react-router-dom'
function RouterView({ routes }) {
    const routerArr = routes && routes.filter(item => !item.to);//非重定向的数组
    const redirectArr = routes && routes.filter(item => item.to);//重定向的数组
    return <Switch>
        {
            routerArr && routerArr.map((item, index) => <Route key={index} path={item.path} render={(props) => {
                return <itemponent {...props} child={item.children} />
            }} />)
        }
        {
            redirectArr && redirectArr.map((item, index) => <Redirect key={index} from={item.path} to={item.to} />)
        }

    </Switch>
}

export default RouterView;

• 4、在app.js中引入路由入口文件

import './App.css';
import RootRouter from './router';
function App() {
  return <div className='origin'>
    <RootRouter />
  </div>
}

export default App;

问题来了，怎么在首次加载的时候显示 /index/home 对应的组件呢？

• 5、在pages文件夹下对应的/index这个jsx文件中写入：

import React from 'react';
import { NavLink } from 'react-router-dom';
import RouterView from '../../router/routerView';
import "./index.css"
export default class Index extends React.Component {
  render() {
    const { child } = this.props;
    return (
      <div className='index'>
        <div className='main'>
        <RouterView routes={child}></RouterView>
        </div>
        <div className="footer">
          <NavLink to="/index/home" activeClassName='active'>首页</NavLink>
          <NavLink to="/index/classify">分类</NavLink>
          <NavLink to="/index/car">购物车</NavLink>
          <NavLink to="/index/my">我的</NavLink>
        </div>
      </div>
    );
  }
}

大功告成了！ 感谢支持！

注意：使用的版本是

"react": "17.0.2",

"react-dom": "17.0.2",

"react-router-dom": "5.2.0",

步骤如下：

• 1、在src目录下新建 router 文件夹

• 2、在src下新建pages文件夹，新建自己需要的路由体系

• 3、在文件夹中新建 index.js routerView.js routerConfig.js 三个js文件

index.js （ 路由入口文件 以 BrowserRouter 为例 ）

import { BrowserRouter } from "react-router-dom"
import routes from "./routerConfig";
import RouterView from "./routerView"
export default function RootRouter() {
  return (
    <BrowserRouter>
        <RouterView routes={routes}></RouterView>
    </BrowserRouter>
  )
}

routerConfig.js （根据自己的路由配置对应的路由数组）

import Index from "../pages/Index";
import Home from "../pages/Index/home";
import Classify from "../pages/Index/classify";
import Car from "../pages/Index/car";
import My from "../pages/Index/my";
import Login from "../pages/Login";

const routes = [
    {
        path: "/login",
        component: Login,
    },
    {
        path: "/index",
        component: Index,
        children: [
            {
                path: "/index/home",
                component: Home,
            },
            {
                path: "/index/classify",
                component: Classify,
            },
            {
                path: "/index/car",
                component: Car,
            },
            {
                path: "/index/my",
                component: My,
            }
        ],
    },
    {
        path: "/",
        to: "/index/home"  // 重定向
    }
]


export default routes;

routerView.js 

import { Switch, Route, Redirect } from 'react-router-dom'
function RouterView({ routes }) {
    const routerArr = routes && routes.filter(item => !item.to);//非重定向的数组
    const redirectArr = routes && routes.filter(item => item.to);//重定向的数组
    return <Switch>
        {
            routerArr && routerArr.map((item, index) => <Route key={index} path={item.path} render={(props) => {
                return <itemponent {...props} child={item.children} />
            }} />)
        }
        {
            redirectArr && redirectArr.map((item, index) => <Redirect key={index} from={item.path} to={item.to} />)
        }

    </Switch>
}

export default RouterView;

• 4、在app.js中引入路由入口文件

import './App.css';
import RootRouter from './router';
function App() {
  return <div className='origin'>
    <RootRouter />
  </div>
}

export default App;

问题来了，怎么在首次加载的时候显示 /index/home 对应的组件呢？

• 5、在pages文件夹下对应的/index这个jsx文件中写入：

import React from 'react';
import { NavLink } from 'react-router-dom';
import RouterView from '../../router/routerView';
import "./index.css"
export default class Index extends React.Component {
  render() {
    const { child } = this.props;
    return (
      <div className='index'>
        <div className='main'>
        <RouterView routes={child}></RouterView>
        </div>
        <div className="footer">
          <NavLink to="/index/home" activeClassName='active'>首页</NavLink>
          <NavLink to="/index/classify">分类</NavLink>
          <NavLink to="/index/car">购物车</NavLink>
          <NavLink to="/index/my">我的</NavLink>
        </div>
      </div>
    );
  }
}

大功告成了！ 感谢支持！