tried to take the output result from Oracle SQL and insert it into excel using java - sql

Question

tried to enter the output value from [ Oracle DB result ] to [ insert that value in Excel ]:
enter image description here
GetExcelCode:
Fillo fillo = new Fillo();
Connection connection;
try{
connection = fillo.getConnection("C:/Users/**/DataTawn_2.xlsx");
String strQuery = "INSERT INTO DataSheet(QuotationNumber) VALUES('" + QuotNumber + "')";
Recordset recordset = connection.executeQuery(strQuery);
System.out.println(" Recordset recordset");
while (recordset.next()) {
ArrayList<String> dataColl = recordset.getFieldNames();
Iterator <String> dataIterator = dataColl.iterator();
while (dataIterator.hasNext()){
for(int i=0; i<= dataColl.size()-1;i++ ){
String Data = dataIterator.next();
String datavalue = recordset.getField(Data);
String testData= dataColl.get(i);
System.out.println(" the test data is: "+ recordset.getField(testData));
}
break;
}
}
Oracle connectivity
st.executeQuery("select * from tajcrs.policy where bus_type='CL' ");
ResultSet res = st.getResultSet();
int count = 0;
while (res.next()) {
if (con != null)
System.out.println("Print select * from tajcrs.members");
quotation= res.getInt("quotation_no");
System.out.println("quotation_no = " + quotation);
break;
//count++;
}
/**
* calling the method
*/
getexcel.selectData(quotation);