有人知道如何使用React Express解决CORS问题吗？

const express = require('express');
const cors = require('cors');

const app = express();

app.use(cors());

// 其他Express路由和中间件

app.listen(3000, () => {
  console.log('Server started on port 3000');
});

import React, { useEffect } from 'react';
import axios from 'axios';

const MyComponent = () => {
  useEffect(() => {
    const fetchData = async () => {
      try {
        const response = await axios.get('http://example.com/api/data', {
          headers: {
            'Access-Control-Allow-Origin': '*',
          },
        });
        console.log(response.data);
      } catch (error) {
        console.error(error);
      }
    };

    fetchData();
  }, []);

  return <div>My Component</div>;
};

export default MyComponent;