Best way to copy table from one database to any other database

Question

I need to write an application to perform database table copy from one kind of database to another kind of database.
I just wrote a simple JDBC program which essentially does the something like below:
PreparedStatement statement = null;
ResultSet rs = null;
try
System.out.println("insertSQL:" + insertSQL.toString());      
statement = target.prepareStatement(insertSQL.toString());
System.out.println("selectSQL:" + selectSQL.toString());
rs = source.executeQuery(selectSQL.toString());
int rows = 0;
while (rs.next())
rows++;
for (int i = 1; i <= columns.size(); i++)
statement.setString(i, rs.getString(i));
statement.execute();
System.out.println("Copied " + rows + " rows.");
But problem with this one is that it takes lot of time( more than 60 mins) for 100k records transfer. Would there be any faster way to do this?
TIA...

Answer 1

Thanks...
I am using now batch update mechanism and set the fetchsize of resultSet cursor.
Now I need to copy a table with almost 10 million records to the target database. My program works fine but it takes more than 3 hours.
I am copying from Postgres table to MS SQL server table.
Is there any other way or more better appraoch to make this more faster?
TIA..