HashMap and dynamic JDBC update

Alessandro <ale.mito@tiscali.it>
Fri, 7 Aug 2009 01:31:01 -0700 (PDT)

I have an HashMap<String, Object> used to save names and values of
fields to be updated via JDBC update in a table. The type of data is
variable according to field name , so I'm using Object ... the idea to
produce update query is as follows but I believe there is a better
method to do it.

public void updateQuery(Session session, String table,
HashMap<String,Object> updateH, String condition) throws Throwable{
                        String sQuery="UPDATE " + table + " SET ";
                        String keys="";

                        Iterator iterator = updateH.keySet().iterator
(); //key set
                        while(iterator.hasNext()) //got the key
and then remove first char,
ie ","
                                keys= keys + "," + iterator.next() +
"= ?";

                        PreparedStatement ps = session.connection
+ keys.substring(1) + " WHERE " + condition);

                                Object myObj=updateH.get(iterator.next
                                if(myObj instanceof String){

                                else if (myObj.instanceof Date){
                               //etc also for Double, Integer, ..
                catch(Throwable ex){
                        throw ex;


Any suggestions ?

Thanks in advance and best regards,

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