如何在react redux中将/:user链接重定向到404页面

npm install react-router-dom

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

const NotFound = () => {
  return (
    <div>
      <h1>404 Not Found</h1>
      <p>Sorry, the page you are looking for does not exist.</p>
    </div>
  );
};

const App = () => {
  return (
    <Router>
      <Switch>
        <Route exact path="/" component={Home} />
        <Route exact path="/about" component={About} />
        <Route component={NotFound} />
      </Switch>
    </Router>
  );
};

const UserPage = ({ match }) => {
  const { user } = match.params;

  // 检查user是否存在，如果不存在则重定向到404页面
  if (!user) {
    return <Redirect to="/404" />;
  }

  // 其他逻辑...

  return (
    <div>
      <h1>Welcome, {user}!</h1>
      {/* 其他内容 */}
    </div>
  );
};