如何使react路由路径1/2/3？

npm install react-router-dom

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

const Component1 = () => <h1>Component 1</h1>;
const Component2 = () => <h1>Component 2</h1>;
const Component3 = () => <h1>Component 3</h1>;

const App = () => {
  return (
    <Router>
      <div>
        <nav>
          <ul>
            <li>
              <Link to="/1">Component 1</Link>
            </li>
            <li>
              <Link to="/2">Component 2</Link>
            </li>
            <li>
              <Link to="/3">Component 3</Link>
            </li>
          </ul>
        </nav>

        <Route path="/1" component={Component1} />
        <Route path="/2" component={Component2} />
        <Route path="/3" component={Component3} />
      </div>
    </Router>
  );
};

ReactDOM.render(<App />, document.getElementById('root'));