BatchSqlUpdate - how to get auto generated keys

I am using spring BatchSqlUpdate to insert a set of rows. How do I get the auto generated keys for all of the rows inserted?

When doing a single insert I get the keys like this -

SqlUpdate sqlUpdate = new SqlUpdate(dataSource, sqlTemplate.toString());
sqlUpdate.setReturnGeneratedKeys(true);
KeyHolder keyHolder = new GeneratedKeyHolder();
sqlUpdate.update(new Object[] {}, keyHolder);
return keyHolder.getKey().longValue();

Thanks!