jsp - java String to Date conversion and re-convert date format dd/mm/yy to dd/mm/yyyy -

in application i've set default value in input text box(a jsp file) date.i m fetching oracle database fetches string.so i've convert date.the problem in conversion. picks date '30-apr-2013' .i've convert in date re-convert desire date format 'dd/mm/yyyy'. in webservice write following:

@webmethod(operationname = "currenteod")     public string currenteod() {          string result = null;         try{         string sql="select to_char(to_date(max(dat_eod),'dd-mon-yyyy'),'dd/mm/yyyy')";          transactionmanager tm=transactionmanager.getinstance();         try         {          tm.begin();         result=tm.executescalar(sql).tostring();         system.out.println(result);          tm.end();         system.out.println("transaction end..... " );         }          catch(exception e)             {                     tm.rollback();                     system.out.println("service: " + e);               }         }         catch(exception ex)         {          system.out.println("exception: " + ex);         }         return result;     } 

now when invoke in jsp page this:

java.lang.string result = port.currenteod(); out.println(result); } catch (exception ex) {  } %> <%-- end web service invocation --%>" size="20px" style="color: #aaaaaa"/>                                    <img style="cursor: hand" src="calendar/images/calendar.jpg" onclick="displaycalendar(document.forms[0].txtfromdate,'dd/mm/yyyy',this)" alt="calendar"/> 

///my code

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here result=30/04/0013 in oracle database dat_eod= 30-apr-13

after using to_char , to_date returns 30/04/0013

how convert 30/04/2013

please consider store in database type timestamp. converted java date , not need conversions. (also, supported hibernate if want use in future)