如何写mysql数据库接口

import java.sql.*;

public class MySQLInterface {
    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;

        try {
            // 导入MySQL数据库驱动
            Class.forName("com.mysql.jdbc.Driver");

            // 建立数据库连接
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");

            // 创建Statement对象
            stmt = conn.createStatement();

            // 执行SQL查询语句
            rs = stmt.executeQuery("SELECT * FROM mytable");

            // 处理查询结果
            while (rs.next()) {
                String column1 = rs.getString("column1");
                int column2 = rs.getInt("column2");
                // 处理结果数据
            }

        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            // 关闭数据库连接
            try {
                if (rs != null) rs.close();
                if (stmt != null) stmt.close();
                if (conn != null) conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}