Java alhmso

package a;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.HashMap;

public class Main {

	public static void main(String[] args) {

		ArrayList<HashMap<String, Object>> alhmso = new ArrayList<HashMap<String, Object>>();

		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			try (Connection c = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databasename=dc2019;Encrypt=false", "sa", "dinglin"); PreparedStatement ps = c.prepareStatement("select top 10000000 * from t_m1"); ResultSet rs = ps.executeQuery();) {
				while (rs.next()) {
					HashMap<String, Object> hmso = new HashMap<String, Object>();
					hmso.put("id", rs.getInt(1));
					hmso.put("InstrumentID", rs.getString(2));
					hmso.put("TradingDay", rs.getDate(3));
					hmso.put("UpdateTime", rs.getTime(4));
					hmso.put("LastPrice", rs.getBigDecimal(5));
					hmso.put("PreClosePrice", rs.getBigDecimal(6));
					hmso.put("OpenPrice", rs.getBigDecimal(7));
					hmso.put("HighestPrice", rs.getBigDecimal(8));
					hmso.put("LowestPrice", rs.getBigDecimal(9));
					hmso.put("Volume", rs.getInt(10));
					hmso.put("LowerLimitPrice", rs.getBigDecimal(11));
					// hmso.put("tmpvol", rs.getInt(12));
					alhmso.add(hmso);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println(alhmso.size());

	}
}