Odczyt list

src/main/java/programy/P02_OdczytajListe_JPQL.java

+package programy;
+
+import java.util.List;
+
+import jakarta.persistence.*;
+import model.*;
+
+public class P02_OdczytajListe_JPQL {
+
+    public static void main(String[] args) {
+        EntityManagerFactory emf = null;
+        EntityManager em = null ;
+        try {
+            emf = Persistence.createEntityManagerFactory("hr_postgresql");
+            em = emf.createEntityManager();
+            // JPQL = Java Persistence Query Language
+            TypedQuery<Location> query = em.createQuery("SELECT loc FROM Location loc ORDER BY loc.country.countryId, loc.city", Location.class);
+            List<Location> locations = query.getResultList();
+            for (Location loc : locations) {
+                System.out.printf(" - %s, %s %s, %s\n", loc.getStreetAddress(), loc.getPostalCode(), loc.getCity(),
+                        loc.getCountry().getCountryName());
+            }
+        } finally {
+            em.close();
+            emf.close();            
+        }
+    }
+
+}

src/main/java/programy/P03_OdczytajListe_NamedQuery.java

+package programy;
+
+import java.util.List;
+
+import jakarta.persistence.*;
+import model.*;
+
+public class P03_OdczytajListe_NamedQuery {
+
+    public static void main(String[] args) {
+        EntityManagerFactory emf = null;
+        EntityManager em = null ;
+        try {
+            emf = Persistence.createEntityManagerFactory("hr_postgresql");
+            em = emf.createEntityManager();
+            TypedQuery<Location> query = em.createNamedQuery("Location.findAll", Location.class);
+            List<Location> locations = query.getResultList();
+            for (Location loc : locations) {
+                System.out.printf(" - %s, %s %s, %s\n", loc.getStreetAddress(), loc.getPostalCode(), loc.getCity(),
+                        loc.getCountry().getCountryName());
+            }
+        } finally {
+            em.close();
+            emf.close();            
+        }
+    }
+
+}