persistence.xml i pierwszy program

.idea/jpa.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JpaBuddyIdeaProjectConfig">
+    <option name="reLastEntityCreationPackage" value="src/main/java/hr/model" />
+    <option name="reverseEngineeringLastDbConnectionId" value="69a0b1e1-6916-48d8-97e3-4c1a6e46c2b2" />
+  </component>
+</project>
\ No newline at end of file

src/main/java/przyklady/P0_OdczytajKraj.java

+package przyklady;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import jakarta.persistence.Persistence;
+
+public class P0_OdczytajKraj {
+    public static void main(String[] args) {
+        System.out.println("Początek main");
+        EntityManagerFactory emf = Persistence.createEntityManagerFactory("hr");
+        System.out.println("Jest fabryka: " + emf);
+
+        EntityManager em = emf.createEntityManager();
+        System.out.println("Jest EM: " + em);
+
+
+
+
+        System.out.println("Zamykamy...");
+        em.close();
+        emf.close();
+        System.out.println("Koniec main");
+    }
+}

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

+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<persistence xmlns="https://jakarta.ee/xml/ns/persistence"
+             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="https://jakarta.ee/xml/ns/persistence https://jakarta.ee/xml/ns/persistence/persistence_3_1.xsd"
+             version="3.1">
+  <persistence-unit name="hr" transaction-type="RESOURCE_LOCAL">
+    <class>hr.model.Country</class>
+    <class>hr.model.Department</class>
+    <class>hr.model.Employee</class>
+    <class>hr.model.Job</class>
+    <class>hr.model.JobHistory</class>
+    <class>hr.model.Location</class>
+    <class>hr.model.Region</class>
+    <properties>
+      <property name="jakarta.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/hr"/>
+      <property name="jakarta.persistence.jdbc.user" value="alx"/>
+      <property name="jakarta.persistence.jdbc.password" value="abc123"/>
+    </properties>
+  </persistence-unit>
+</persistence>