double_work/db.js

const mysql = require('mysql2/promise');

// 创建连接池
const pool = mysql.createPool({
  host: 'localhost',  // 数据库地址
  user: 'root',       // 数据库用户名
  password: '123456',  // 数据库密码
  database: 'class_k' ,// 使用的数据库
  waitForConnections: true,
  connectionLimit: 10,
  queueLimit: 0
});

// 测试数据库连接
pool.getConnection((err, connection) => {
  if (err) {
      console.error('Error connecting to the database:', err);
  } else {
      console.log('Database connected successfully!');
      connection.release(); // 释放连接
  }
});

module.exports = pool;