在值不为零的查询中从MySQL获取字段名

import java.sql.*;

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

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

            // 2. 执行SQL查询语句
            String sqlQuery = "SELECT * FROM mytable WHERE mycolumn <> 0";
            statement = connection.createStatement();
            resultSet = statement.executeQuery(sqlQuery);

            // 3. 获取查询结果集
            ResultSetMetaData metaData = resultSet.getMetaData();
            int columnCount = metaData.getColumnCount();

            // 4. 获取字段名
            for (int i = 1; i <= columnCount; i++) {
                String columnName = metaData.getColumnName(i);
                System.out.println("Column Name: " + columnName);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接和资源
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}