See full tutorial here : https://cedricleruth.com/how-to-programmatically-commit-or-rollback-a-transaction-in-oracle-adf/

HowToCommitIteratorProgramaticallyInOracleADF.java

public static ViewObjectImpl getViewObjectFromIterator(String nomIterator) {
	ViewObjectImpl returnVO = null;
	DCBindingContainer dcb = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
	if (dcb != null) {
		DCIteratorBinding iter = dcb.findIteratorBinding(nomIterator);
		if (iter != null) {
			returnVO = (ViewObjectImpl)iter.getViewObject();
		}
	}
	return returnVO;
}

private void commitIterator(String IteratorName) {
	ViewObject vo = this.getViewObjectFromIterator(IteratorName);
	try {
		vo.getApplicationModule().getTransaction().validate();
		vo.getApplicationModule().getTransaction().commit();
	} catch (ValidationException e) {
		String validationErrorMessage = e.getDetailMessage();
		//Occur when some committed data is rejected due to validation error.
		//log it : log(Level.WARNING, " " + validationErrorMessage);
	}
	catch (Exception e)	{
		//Log it and warn something unexpected occured
	}
}

private void rollbackIterator(String IteratorName) {
	ViewObject vo = this.getViewObjectFromIterator(IteratorName);
	try {
		vo.getApplicationModule().getTransaction().rollback();
	} catch (Exception e)	{
		//Log it and warn something unexpected occured
	}
}

//In your action listener simply call the commit function as follow
//You can Find YOUR_ITERATOR_NAME the your PageDef Binding file in the Executables Column
//this.commitIterator("YOUR_ITERATOR_NAME");