How can I use JPA Criteria API for filtering data?

How can I use JPA Criteria API for filtering data?

You can use the JPA Criteria API to create dynamic queries for filtering data based on specific criteria. Would you like an example?

Yes, please provide an example of filtering with JPA Criteria API.

Sure! For instance, if you have an entity called 'Product', you can filter products by price like this: CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<Product> cq = cb.createQuery(Product.class); Root<Product> product = cq.from(Product.class); cq.select(product).where(cb.greaterThan(product.get("price"), 100)); List<Product> results = entityManager.createQuery(cq).getResultList();

What if I want to filter by multiple criteria?

You can combine multiple predicates using the CriteriaBuilder. For example, you can filter by both price and category like this: Predicate pricePredicate = cb.greaterThan(product.get("price"), 100); Predicate categoryPredicate = cb.equal(product.get("category"), "Electronics"); cq.where(cb.and(pricePredicate, categoryPredicate)); This will return products that are both above a certain price and belong to a specific category.