java - Using JSF, JPA and DAO. Without Spring? -

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So far, I still work with JSF and JPA without DAO. Now I want to use the DAO. But how can I start EntityManager in DAO classes? 

  Public category AdresseHome {@PersistenceContext Personal EntityManager EntityManager; Public Zero continues (Adresse transientInstance) {log.debug ("Adresse instance" issued); Try {EntityManager.persist (transientInstance); Log.debug ("be successful"); } Hold (runtime expansion) {log. Terror ("frequent failure", again); Throw away;  
 Thanks   
 
 
 If your container does not inject EntityManager for you You can get it:  
  EntityManagerFactory Factory; Factory = stability. Couture antimynganger factor ("zapestast"); EntityManager em = factory.createEntityManager ();  
 
 Where "jpatest" from the unit defined in your persistence.xml

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