npm install react-router-dom

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

const PrivateRoute = ({ component: Component, ...rest }) => {
  const isLoggedIn = // 从应用程序的状态管理中获取用户的登录状态
  return (
    <Route
      {...rest}
      render={props =>
        isLoggedIn ? (
          <Component {...props} />
        ) : (
          <Redirect to="/login" />
        )
      }
    />
  );
};

<Router>
  <Switch>
    <Route exact path="/login" component={LoginPage} />
    <PrivateRoute exact path="/dashboard" component={DashboardPage} />
    <PrivateRoute exact path="/profile" component={ProfilePage} />
    <Route path="*" component={NotFoundPage} />
  </Switch>
</Router>