如何使用java连接数据库mysql

import java.sql.*;

public class MySQLExample {
    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 加载并注册驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 创建数据库连接
            connection = DriverManager.getConnection(
                    "jdbc:mysql://your-mysql-hostname:your-mysql-port/your-mysql-database",
                    "your-username",
                    "your-password");

            // 创建Statement对象
            statement = connection.createStatement();

            // 执行SQL查询
            resultSet = statement.executeQuery("SELECT * FROM your-table");

            // 处理查询结果
            while (resultSet.next()) {
                System.out.println(resultSet.getString("column1") + ", " + resultSet.getString("column2"));
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (resultSet != null) resultSet.close();
                if (statement != null) statement.close();
                if (connection != null) connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}