如何将activity设置为按钮单击变量，该变量仅通过TapBarMenu赋值，字符串为web，图像项为ImageId？

import React, { useState } from 'react';

const ButtonComponent = () => {
  const [activity, setActivity] = useState('');

  const handleButtonClick = () => {
    setActivity('web');
  };

  return (
    <button onClick={handleButtonClick}>按钮</button>
  );
};

export default ButtonComponent;

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

let activity = '';

app.get('/button-click', (req, res) => {
  activity = 'web';
  res.send('按钮点击成功');
});

app.listen(3000, () => {
  console.log('服务器已启动');
});

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class ButtonTest {

  @Test
  public void testButtonClick() {
    Button button = new Button();
    button.click();
    assertEquals("web", button.getActivity());
  }
}

CREATE TABLE activity (
  id INT PRIMARY KEY AUTO_INCREMENT,
  value VARCHAR(255)
);