private void closeResources(Connection conn, Statement st, ResultSet rs) {
		if (null != rs) {
			try {
				rs.close();
			} catch (SQLException e) {
			}
		}
		if (null != st) {
			try {
				st.close();
			} catch (SQLException e) {
			}
		}
		if (null != conn) {
			try {
				conn.close();
			} catch (SQLException e) {
			}
		}
	}