import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class OceanBaseQueryExample {

    public static void main(String[] args) {
        // 配置数据库连接信息
        String url = "jdbc:oceanbase://your_oceanbase_server:your_port/your_database";
        String user = "your_username";
        String password = "your_password";

        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 加载驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立连接
            connection = DriverManager.getConnection(url, user, password);

            // 步骤1：创建 Statement 对象
            statement = connection.createStatement();

            // 步骤2：执行查询并获取结果集对象
            String query = "SELECT * FROM your_table";
            resultSet = statement.executeQuery(query);

            // 步骤3：处理结果集
            while (resultSet.next()) {
                // 获取每一行的数据，可以根据列名或列索引获取
                int column1Value = resultSet.getInt("column1");
                String column2Value = resultSet.getString("column2");
                
                // 处理其他列的值...
                
                // 输出到控制台或进行其他操作
                System.out.println("Column1: " + column1Value + ", Column2: " + column2Value);
            }

        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        } finally {
            // 步骤4：在合适的地方关闭资源
            if (resultSet != null) {
                try {
                    resultSet.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }

            if (statement != null) {
                try {
                    statement.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }

            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}