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copied!<p>There are several problems with your code.</p> <p>First one: you don't respect naming conventions. variables should start with a lower-case letter. This makes your code harder to read for seasoned Java programmers.</p> <p>Second one: you loop over your item IDs, and change the value of your <code>ItemprofilPk</code> and <code>Itemprofil</code> objects. But you update always the same objects, and only persist the item after the loop. so, of course, only the last value is persisted. Change to something like this:</p> <pre><code>for (Integer val : getListidItemByItemName()) { AssociationItemProfilPK itemprofilPk = new AssociationItemProfilPK(); AssociationItemProfil itemprofil = new AssociationItemProfil(); itemprofilPk.setItemId(val); itemprofilPk.setProfilId(user.getProfilUserId()); itemprofil.setAssociationItemProfilPK(itemprofilPk); em.persist(itemprofil); } </code></pre> <p>Third one: your mapping is more complex than id needs. You should not have an entity to map the association table. Instead, you should thus have a list of items in the <code>ProfilUser</code> entity, and a list of profilUsers in the <code>Item</code> entity :</p> <pre><code>public class ProfilUser { @ManyToMany @JoinTable( name = "associationProfileUserItem", joinColumns = @JoinColumn(name = "PROFIL_ID"), inverseJoinColumns=@JoinColumn(name="ITEM_ID") private List<Item> items; } public class Item { @ManyToMany(mappedBy = "items") private List<ProfilUser profilUsers; } </code></pre>

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