mysql数据库连接用户名代码

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="yourusername",
  password="yourpassword",
  database="yourdatabase"
)

import java.sql.*;

public class Main {
  public static void main(String[] args) {
    Connection conn = null;
    try {
      String url = "jdbc:mysql://localhost:3306/yourdatabase";
      String user = "yourusername";
      String password = "yourpassword";
      
      conn = DriverManager.getConnection(url, user, password);
    } catch (SQLException e) {
      e.printStackTrace();
    } finally {
      try {
        if (conn != null) {
          conn.close();
        }
      } catch (SQLException ex) {
        ex.printStackTrace();
      }
    }
  }
}

const mysql = require('mysql');

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'yourusername',
  password: 'yourpassword',
  database: 'yourdatabase'
});

connection.connect((err) => {
  if (err) throw err;
  console.log('Connected to MySQL database!');
});

connection.end();