从React中的其他生成的路由链接到生成的路由

import React from 'react';
import { BrowserRouter as Router, Route, Link, Switch } from 'react-router-dom';

function Home() {
  return <h2>首页</h2>;
}

function About() {
  return <h2>关于</h2>;
}

function Profile() {
  return <h2>个人中心</h2>;
}

function App() {
  return (
    <Router>
      <div>
        <nav>
          <ul>
            <li>
              <Link to="/">首页</Link>
            </li>
            <li>
              <Link to="/about">关于</Link>
            </li>
            <li>
              <Link to="/profile">个人中心</Link>
            </li>
          </ul>
        </nav>

        <Switch>
          <Route path="/" exact component={Home} />
          <Route path="/about" component={About} />
          <Route path="/profile" component={Profile} />
        </Switch>
      </div>
    </Router>
  );
}

export default App;

<Switch>
  <Route path="/" exact component={Home} />
  <Route path="/about" component={About} />
  <Route path="/profile" component={Profile} />
</Switch>

<ul>
  <li>
    <NavLink to="/" exact activeClassName="active">首页</NavLink>
  </li>
  <li>
    <NavLink to="/about" activeClassName="active">关于</NavLink>
  </li>
  <li>
    <NavLink to="/profile" activeClassName="active">个人中心</NavLink>
  </li>
</ul>