如何在react路由器转换过程中获取数据？

import React, { Component } from 'react';

class UserDetail extends Component {
  constructor(props) {
    super(props);
    this.state = {
      user: null,
    };
  }

  componentDidMount() {
    // 发送异步请求获取用户数据
    fetch('/api/user/' + this.props.match.params.id)
      .then(response => response.json())
      .then(data => {
        this.setState({ user: data });
      });
  }

  render() {
    const { user } = this.state;

    if (!user) {
      return <div>Loading...</div>;
    }

    return (
      <div>
        <h1>{user.name}</h1>
        <p>{user.email}</p>
        {/* 显示用户其他信息 */}
      </div>
    );
  }
}

export default UserDetail;

import React, { createContext, useState, useEffect } from 'react';

const UserContext = createContext();

const App = () => {
  const [user, setUser] = useState(null);

  useEffect(() => {
    // 发送异步请求获取用户数据
    fetch('/api/user/' + userId)
      .then(response => response.json())
      .then(data => {
        setUser(data);
      });
  }, []);

  return (
    <UserContext.Provider value={user}>
      {/* 路由组件 */}
    </UserContext.Provider>
  );
};

export default App;

import React, { useContext } from 'react';
import UserContext from './UserContext';

const UserDetail = () => {
  const user = useContext(UserContext);

  if (!user) {
    return <div>Loading...</div>;
  }

  return (
    <div>
      <h1>{user.name}</h1>
      <p>{user.email}</p>
      {/* 显示用户其他信息 */}
    </div>
  );
};

export default UserDetail;