项目连接mysql数据库语句

import mysql.connector

cnx = mysql.connector.connect(user='username', password='password', host='localhost', database='dbname')

import java.sql.*;

String url = "jdbc:mysql://localhost/dbname";
String user = "username";
String password = "password";

Connection con = DriverManager.getConnection(url, user, password);

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";

$conn = new mysqli($servername, $username, $password, $dbname);

const mysql = require('mysql');

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

connection.connect();