如何查询数据库服务器时间

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

public class DatabaseTimeQuery {
    public static void main(String[] args) {
        String url = "jdbc:mysql://your-database-server:3306/your-database-name";
        String username = "your-username";
        String password = "your-password";
        
        try {
            // 连接到MySQL数据库
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 创建Statement对象
            Statement statement = connection.createStatement();
            
            // 执行SQL查询语句
            ResultSet resultSet = statement.executeQuery("SELECT NOW();");
            
            // 处理查询结果
            if (resultSet.next()) {
                String serverTime = resultSet.getString(1);
                System.out.println("Database server time: " + serverTime);
            }
            
            // 关闭连接和资源
            resultSet.close();
            statement.close();
            connection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}