nodejs怎么连接mysql

npm install mysql

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

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

connection.query('SELECT * FROM my_table', (err, rows) => {  if (err) {    console.error('error querying: ' + err.stack);    return;  }  console.log('rows: ', rows);});

connection.end((err) => {  // ...});