Node :如何在JS+Express(EJS)中定义和使用MySQL数据？

npm install mysql

const mysql = require('mysql');

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password',
  database: 'mydatabase'
});

connection.connect((err) => {
  if (err) {
    console.error('Error connecting to MySQL database: ' + err.stack);
    return;
  }
  console.log('Connected to MySQL database as id ' + connection.threadId);
});

connection.query('SELECT * FROM users', (err, results) => {
  if (err) {
    console.error('Error executing MySQL query: ' + err.stack);
    return;
  }
  console.log('Query results:', results);
});

connection.end((err) => {
  if (err) {
    console.error('Error closing MySQL connection: ' + err.stack);
    return;
  }
  console.log('MySQL connection closed.');
});