java將數據庫結果集封裝成Map, java獲取數據庫字段 (修定)

這段代碼是將結果集封裝到Map裏，字段爲key，記錄爲value。然後再將每個Map添加到List裏。

大家有什麼建議和想法可以留言給我。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;

public class DBHelper {
	public static void main(String[] args) throws ClassNotFoundException,
			SQLException {
		Class.forName("oracle.jdbc.driver.OracleDriver");
		String url = "jdbc:oracle:thin:@localhost:1521:orcl";
		String user = "ssmy";
		String password = "ssmy";
		Connection conn = DriverManager.getConnection(url, user, password);
		Statement stmt = conn.createStatement();
		/*//造數據
		 * for(char letter='a';letter<='z';letter++){ int id = letter-97; String
		 * name = ""; String sex = (id&1)!=0?"男":"女"; String state = "Y";
		 * 
		 * String sql =
		 * "insert into person (id,name, sex,state) values("+id+","+
		 * name+","+sex+","+state+")"; ps.execute(sql); }
		 */
		ResultSet rs = stmt.executeQuery("select t.* from SSMY_SYS_USER t");
		ResultSetMetaData data = rs.getMetaData();

		ArrayList<HashMap<String, String>> al = new ArrayList<HashMap<String, String>>();

		while (rs.next()) {
			HashMap<String, String> map = new HashMap<String, String>();
			for (int i = 1; i <= data.getColumnCount(); i++) {// 數據庫裏從 1 開始

				String c = data.getColumnName(i);
				String v = rs.getString(c);
				System.out.println(c + ":" + v + "\t");
				map.put(c, v);
			}
			System.out.println("======================");
			al.add(map);
		}
		System.out.println(al);
		rs.close();
		stmt.close();
		conn.close();
		
	}
}

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