I do not know if you solved your problem ... but for making available a solution for other users also, I decided to post an answer.
For solving you problem your should make the following changes:
1. In the class Infoxl2Bean you need to put List infos = new ArrayList(); as class member (to declare it outside the methods) and to have a set method for it.
2. Change beans.put("infos", infos); to beans.put("infosHolder", this);
3. In the config XML change items="infos" to items="infosHolder.infos"