如何将CellStyle对象存储到数据库中？

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class CellStyleStorage {
    private static final String DB_URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String DB_USER = "username";
    private static final String DB_PASSWORD = "password";

    public void storeCellStyle(CellStyle cellStyle) {
        try (Connection connection = getConnection()) {
            String insertQuery = "INSERT INTO cell_styles (style_data) VALUES (?)";
            PreparedStatement statement = connection.prepareStatement(insertQuery);
            statement.setString(1, convertCellStyleToJson(cellStyle));
            statement.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public CellStyle retrieveCellStyle(int cellStyleId) {
        try (Connection connection = getConnection()) {
            String selectQuery = "SELECT style_data FROM cell_styles WHERE id = ?";
            PreparedStatement statement = connection.prepareStatement(selectQuery);
            statement.setInt(1, cellStyleId);
            ResultSet resultSet = statement.executeQuery();
            if (resultSet.next()) {
                String styleData = resultSet.getString("style_data");
                return convertJsonToCellStyle(styleData);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    private Connection getConnection() throws SQLException {
        MysqlDataSource dataSource = new MysqlDataSource();
        dataSource.setURL(DB_URL);
        dataSource.setUser(DB_USER);
        dataSource.setPassword(DB_PASSWORD);
        return dataSource.getConnection();
    }

    private String convertCellStyleToJson(CellStyle cellStyle) {
        // Convert CellStyle object to JSON
        // ...
        return json;
    }

    private CellStyle convertJsonToCellStyle(String json) {
        // Convert JSON to CellStyle object
        // ...
        return cellStyle;
    }
}