Program czytający Employee wg id

src/main/java/programy/P01_OdczytajWgId.java

+package programy;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import jakarta.persistence.Persistence;
+import model.Employee;
+
+public class P01_OdczytajWgId {
+
+    public static void main(String[] args) {
+        System.out.println("Startujemy...");
+        
+        EntityManagerFactory emf = Persistence.createEntityManagerFactory("hr_postgresql");
+        EntityManager em = emf.createEntityManager();
+        
+        System.out.println("Mam EntityManagera: " + em);
+        
+        Integer id = 103;
+        Employee emp = em.find(Employee.class, id);
+        System.out.println("Odczytany obiekt: " + emp);
+        if(emp != null) {
+            System.out.printf("%s %s (%s) zarabia %s\n",
+                    emp.getFirstName(), emp.getLastName(), emp.getJob().getJobTitle(), emp.getSalary());
+        }
+        
+        em.close();
+        emf.close();
+        System.out.println("Koniec");
+    }
+
+}

src/main/resources/META-INF/persistence.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <persistence version="2.2" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd">
-	<persistence-unit name="alx_mszczonow_2" transaction-type="RESOURCE_LOCAL">
+	<persistence-unit name="hr_postgresql" transaction-type="RESOURCE_LOCAL">
 		<class>model.Country</class>
 		<class>model.Department</class>
 		<class>model.Employee</class>