I am discovering actually Spring and I am able to setup some jobs. Now, I would like to save my imported datas in a database using Hibernate/JPA and I keep getting this erro
You need to explicitly reference your Transaction Manager in your step definition:
See: 5.1.1. Configuring a Step
Ah, seeing that you use JavaConfig, you need to assign the transaction manager to the TaskletStepBuilder using builder.transactionManager(transactionManager) (inherited from StepBuilderHelper)