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JAVA-41259 Moved code of article jpa-java-time from java-jpa to java-jpa-4
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‎persistence-modules/java-jpa-4/README.md‎

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@@ -12,3 +12,4 @@ This module contains articles about the Java Persistence API (JPA) in Java.
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- [JPA @Basic Annotation](https://www.baeldung.com/jpa-basic-annotation)
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- [Fixing the JPA error “java.lang.String cannot be cast to Ljava.lang.String;”](https://www.baeldung.com/jpa-error-java-lang-string-cannot-be-cast)
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- [Converting Between LocalDate and SQL Date](https://www.baeldung.com/java-convert-localdate-sql-date)
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- [JPA Support for java.time Types](https://www.baeldung.com/jpa-java-time)

persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/datetime/DateTimeEntityRepository.java renamed to persistence-modules/java-jpa-4/src/main/java/com/baeldung/jpa/datetime/DateTimeEntityRepository.java

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package com.baeldung.jpa.datetime;
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import jakarta.persistence.EntityManager;
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import jakarta.persistence.EntityManagerFactory;
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import jakarta.persistence.Persistence;
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import java.sql.Date;
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import java.sql.Time;
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import java.sql.Timestamp;
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import java.time.*;
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import java.util.Calendar;
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public class DateTimeEntityRepository {
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private EntityManagerFactory emf = null;
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public DateTimeEntityRepository() {
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emf = Persistence.createEntityManagerFactory("java8-datetime-postgresql");
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}
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public JPA22DateTimeEntity find(Long id) {
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EntityManager entityManager = emf.createEntityManager();
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JPA22DateTimeEntity dateTimeTypes = entityManager.find(JPA22DateTimeEntity.class, id);
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entityManager.close();
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return dateTimeTypes;
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}
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public void save(Long id) {
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JPA22DateTimeEntity dateTimeTypes = new JPA22DateTimeEntity();
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dateTimeTypes.setId(id);
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//java.sql types: date/time
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dateTimeTypes.setSqlTime(Time.valueOf(LocalTime.now()));
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dateTimeTypes.setSqlDate(Date.valueOf(LocalDate.now()));
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dateTimeTypes.setSqlTimestamp(Timestamp.valueOf(LocalDateTime.now()));
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//java.util types: date/calendar
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java.util.Date date = new java.util.Date();
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dateTimeTypes.setUtilTime(date);
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dateTimeTypes.setUtilDate(date);
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dateTimeTypes.setUtilTimestamp(date);
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//Calendar
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Calendar calendar = Calendar.getInstance();
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dateTimeTypes.setCalendarTime(calendar);
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dateTimeTypes.setCalendarDate(calendar);
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dateTimeTypes.setCalendarTimestamp(calendar);
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//java.time types
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dateTimeTypes.setLocalTime(LocalTime.now());
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dateTimeTypes.setLocalDate(LocalDate.now());
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dateTimeTypes.setLocalDateTime(LocalDateTime.now());
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//java.time types with offset
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dateTimeTypes.setOffsetTime(OffsetTime.now());
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dateTimeTypes.setOffsetDateTime(OffsetDateTime.now());
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EntityManager entityManager = emf.createEntityManager();
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entityManager.getTransaction().begin();
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entityManager.persist(dateTimeTypes);
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entityManager.getTransaction().commit();
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entityManager.close();
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}
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public void clean() {
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emf.close();
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}
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}
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package com.baeldung.jpa.datetime;
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import jakarta.persistence.EntityManager;
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import jakarta.persistence.EntityManagerFactory;
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import jakarta.persistence.Persistence;
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import java.sql.Date;
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import java.sql.Time;
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import java.sql.Timestamp;
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import java.time.*;
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import java.util.Calendar;
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public class DateTimeEntityRepository {
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private EntityManagerFactory emf = null;
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public DateTimeEntityRepository() {
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emf = Persistence.createEntityManagerFactory("java8-datetime-postgresql");
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}
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public JPA22DateTimeEntity find(Long id) {
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EntityManager entityManager = emf.createEntityManager();
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JPA22DateTimeEntity dateTimeTypes = entityManager.find(JPA22DateTimeEntity.class, id);
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entityManager.close();
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return dateTimeTypes;
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}
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public void save(Long id) {
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JPA22DateTimeEntity dateTimeTypes = new JPA22DateTimeEntity();
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dateTimeTypes.setId(id);
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//java.sql types: date/time
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dateTimeTypes.setSqlTime(Time.valueOf(LocalTime.now()));
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dateTimeTypes.setSqlDate(Date.valueOf(LocalDate.now()));
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dateTimeTypes.setSqlTimestamp(Timestamp.valueOf(LocalDateTime.now()));
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//java.util types: date/calendar
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java.util.Date date = new java.util.Date();
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dateTimeTypes.setUtilTime(date);
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dateTimeTypes.setUtilDate(date);
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dateTimeTypes.setUtilTimestamp(date);
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//Calendar
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Calendar calendar = Calendar.getInstance();
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dateTimeTypes.setCalendarTime(calendar);
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dateTimeTypes.setCalendarDate(calendar);
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dateTimeTypes.setCalendarTimestamp(calendar);
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//java.time types
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dateTimeTypes.setLocalTime(LocalTime.now());
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dateTimeTypes.setLocalDate(LocalDate.now());
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dateTimeTypes.setLocalDateTime(LocalDateTime.now());
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//java.time types with offset
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dateTimeTypes.setOffsetTime(OffsetTime.now());
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dateTimeTypes.setOffsetDateTime(OffsetDateTime.now());
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EntityManager entityManager = emf.createEntityManager();
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entityManager.getTransaction().begin();
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entityManager.persist(dateTimeTypes);
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entityManager.getTransaction().commit();
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entityManager.close();
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}
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public void clean() {
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emf.close();
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}
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}

persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/datetime/JPA22DateTimeEntity.java renamed to persistence-modules/java-jpa-4/src/main/java/com/baeldung/jpa/datetime/JPA22DateTimeEntity.java

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persistence-modules/java-jpa/src/main/java/com/baeldung/jpa/datetime/MainApp.java renamed to persistence-modules/java-jpa-4/src/main/java/com/baeldung/jpa/datetime/MainApp.java

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package com.baeldung.jpa.datetime;
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public class MainApp {
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public static void main(String... args) {
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DateTimeEntityRepository dateTimeEntityRepository = new DateTimeEntityRepository();
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//Persist
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dateTimeEntityRepository.save(100L);
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//Find
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JPA22DateTimeEntity dateTimeEntity = dateTimeEntityRepository.find(100L);
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dateTimeEntityRepository.clean();
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}
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package com.baeldung.jpa.datetime;
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public class MainApp {
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public static void main(String... args) {
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DateTimeEntityRepository dateTimeEntityRepository = new DateTimeEntityRepository();
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//Persist
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dateTimeEntityRepository.save(100L);
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//Find
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JPA22DateTimeEntity dateTimeEntity = dateTimeEntityRepository.find(100L);
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dateTimeEntityRepository.clean();
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}
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}

‎persistence-modules/java-jpa-4/src/main/resources/META-INF/persistence.xml‎

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</properties>
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</persistence-unit>
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<persistence-unit name="java8-datetime-postgresql"
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transaction-type="RESOURCE_LOCAL">
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<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
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<class>com.baeldung.jpa.datetime.JPA22DateTimeEntity</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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<properties>
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<property name="jakarta.persistence.jdbc.driver" value="org.postgresql.Driver" />
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<property name="jakarta.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/java8-datetime2" />
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<property name="jakarta.persistence.jdbc.user" value="postgres" />
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<property name="jakarta.persistence.jdbc.password" value="postgres" />
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<property name="jakarta.persistence.schema-generation.database.action" value="drop-and-create" />
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<!-- configure logging -->
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<property name="eclipselink.logging.level" value="INFO" />
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<property name="eclipselink.logging.level.sql" value="FINE" />
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<property name="eclipselink.logging.parameters" value="true" />
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</properties>
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</persistence-unit>
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</persistence>

‎persistence-modules/java-jpa/README.md‎

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- [A Guide to SqlResultSetMapping](https://www.baeldung.com/jpa-sql-resultset-mapping)
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- [JPA Entity Graph](https://www.baeldung.com/jpa-entity-graph)
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- [JPA Support for java.time Types](https://www.baeldung.com/jpa-java-time)
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- [Composite Primary Keys in JPA](https://www.baeldung.com/jpa-composite-primary-keys)
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- [Defining JPA Entities](https://www.baeldung.com/jpa-entities)
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- [Persisting Enums in JPA](https://www.baeldung.com/jpa-persisting-enums-in-jpa)

‎persistence-modules/java-jpa/src/main/resources/META-INF/persistence.xml‎

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<persistence-unit name="jpa-h2">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<class>com.baeldung.jpa.stringcast.Message</class>
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<class>com.baeldung.jpa.enums.Article</class>
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<class>com.baeldung.jpa.enums.CategoryConverter</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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</properties>
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</persistence-unit>
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<persistence-unit name="java8-datetime-postgresql"
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transaction-type="RESOURCE_LOCAL">
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<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
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<class>com.baeldung.jpa.datetime.JPA22DateTimeEntity</class>
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<exclude-unlisted-classes>true</exclude-unlisted-classes>
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<properties>
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<property name="jakarta.persistence.jdbc.driver" value="org.postgresql.Driver" />
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<property name="jakarta.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/java8-datetime2" />
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<property name="jakarta.persistence.jdbc.user" value="postgres" />
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<property name="jakarta.persistence.jdbc.password" value="postgres" />
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<property name="jakarta.persistence.schema-generation.database.action" value="drop-and-create" />
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<!-- configure logging -->
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<property name="eclipselink.logging.level" value="INFO" />
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<property name="eclipselink.logging.level.sql" value="FINE" />
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<property name="eclipselink.logging.parameters" value="true" />
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</properties>
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</persistence-unit>
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<persistence-unit name="jpa-entity-definition">
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<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
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<class>com.baeldung.jpa.entity.Student</class>

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