Could I refactor database access functions?

Question

Hi,
I have a lot of functions which doing the database queries. They all return map. "select to_chat(key), to_chart(value) from table"
code like following. Since so many database access parts are same.
only "query", and "preparestatement. setString(1, "aa") , preparestatement. setString(2, "aa") ..........." are different . I wonder if I could refactor them.
If I could, Is there any syncronizaion issue in it.
Thank you so much.
public Map getPriceChangeData(
Timestamp openTime,
Timestamp closeTime)
throws Exception {
TreeMap openCloseData = new TreeMap();
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
final String query ="select to_char(?), to_char(?) from table1";
try {
conn = DSDataLayer.connect();
pstmt = conn.prepareStatement(query);
pstmt.setInt(1, 3);
psmt.setInt(2. 6);
( the psmt.set... could be any number
rs = pstmt.executeQuery();
while (rs.next()) {
openClosetData.put(
rs.getString(1),
rs.getString(2));
return openClosetData;
} catch (SQLException se) {
String err =GETOPENCLOSE_ERR+ "on query"
+ query
+ " "
+ se.toString();
throw new Exception(err);
} catch (Exception e) {
String err = GETOPENCLOSE_ERR
+ e.toString();
throw new Exception(err);
} finally {
try {
if (rs != null)
rs.close();
if (pstmt != null)
pstmt.close();
if (conn != null)
conn.close();
} catch (SQLException sqle) {
//log error and continue
} finally {
rs = null;
pstmt = null;
conn = null;
}

Answer 1

You may also want to look at Native Database Web Services :
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e16659/xdb_web_services.htm