腾讯云mysql数据库怎么连接

 public class MySQLConnection {

     public static void main(String[] args) {

         String url = "jdbc:mysql://数据库主机名:端口号/数据库名称";

         String username = "用户名";

         String password = "密码";

         try {

             Connection conn = DriverManager.getConnection(url, username, password);

             System.out.println("成功连接到MySQL数据库");

             // 进行数据库操作

             conn.close();

         } catch (SQLException e) {

             System.out.println("连接MySQL数据库失败：" + e.getMessage());

         }

     }

 }

 ```

 host = "数据库主机名"

 port = 端口号

 user = "用户名"

 password = "密码"

 database = "数据库名称"

 try:

     conn = pymysql.connect(host=host, port=port, user=user, password=password, database=database)

     print("成功连接到MySQL数据库")

     # 进行数据库操作

     conn.close()

 except pymysql.Error as e:

     print("连接MySQL数据库失败：" + str(e))

 ```

 const connection = mysql.createConnection({

     host: '数据库主机名',

     port: 端口号,

     user: '用户名',

     password: '密码',

     database: '数据库名称'

 });

 connection.connect((err) => {

     if (err) {

         console.error('连接MySQL数据库失败：' + err.stack);

         return;

     }

     console.log('成功连接到MySQL数据库');

     // 进行数据库操作

     connection.end();

 });

 ```