如何从数据表中获取单元格值？单元格值

import java.sql.*;

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

        try {
            // 1. 连接到数据库
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");

            // 2. 执行查询语句
            statement = connection.createStatement();
            String query = "SELECT column_name FROM table_name WHERE condition";
            resultSet = statement.executeQuery(query);

            // 3. 处理查询结果
            while (resultSet.next()) {
                // 4. 获取单元格值
                String cellValue = resultSet.getString("column_name");
                System.out.println("Cell value: " + cellValue);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 5. 关闭数据库连接
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}