Struts2でのショッピングサイト作成

現在練習がてらecサイトを作成しております。
使用言語はjava、フレームワークはstruts２です。

複数の商品を購入した際に購入した商品のデータをDB上に保存したいのですが
どうも一つ目しか登録されてないようです。

BuyItemConfirmAction.java
1public class BuyItemConfirmAction extends ActionSupport implements SessionAware{
2
3	public Map<String, Object> session;
4	private BuyItemCompleteDAO buyItemCompleteDAO = new BuyItemCompleteDAO();
5	public String execute() throws SQLException{
6
7
8
9	buyItemCompleteDAO.buyItemInfo(
10
11			session.get("noteId").toString(),
12			session.get("login_user_id").toString(),
13			session.get("notePrice").toString(),
14			session.get("noteCount").toString(),
15			session.get("pay").toString());
16
17
18
19	buyItemCompleteDAO.buyItemInfo(
20
21			session.get("caseId").toString(),
22			session.get("login_user_id").toString(),
23			session.get("casePrice").toString(),
24			session.get("caseCount").toString(),
25			session.get("pay").toString());
26	String result = SUCCESS;
27	return result;
28}
29
30
31
32
33
34
35	@Override
36	public void setSession(Map<String, Object> session){
37		this.session = session;
38	}
39}

buyItemCompleteDAO
1public class BuyItemCompleteDAO {
2	private DBConnector dbConnector = new DBConnector();
3	private Connection connection = dbConnector.getConnection();
4	private DateUtil dateUtil = new DateUtil();
5	private String sql = "INSERT INTO user_buy_item_transaction(item_transaction_id, total_price, total_count,user_master_id,pay,insert_date) VALUES(?,?,?,?,?,?)";
6
7
8
9	public void buyItemInfo(String item_transaction_id,String user_master_id, String total_price, String total_count, String pay) throws SQLException{
10		try{
11			PreparedStatement preparedStatement = connection.prepareStatement(sql);
12			preparedStatement.setString(1, item_transaction_id);
13			preparedStatement.setString(2, total_price);
14			preparedStatement.setString(3, total_count);
15			preparedStatement.setString(4, user_master_id);
16			preparedStatement.setString(5, pay);
17			preparedStatement.setString(6, dateUtil.getDate());
18			preparedStatement.execute();
19		}catch(Exception e){
20			e.printStackTrace();
21		}finally{
22			connection.close();
23		}
24	}
25}