本文整理了Java中javax.persistence.Persistence类的一些代码示例，展示了Persistence类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Persistence类的具体详情如下：
包路径：javax.persistence.Persistence
类名称：Persistence

Persistence介绍

[英]Bootstrap class that is used to obtain an EntityManagerFactoryin Java SE environments. It may also be used to cause schema generation to occur.

The Persistence class is available in a Java EE container environment as well; however, support for the Java SE bootstrapping APIs is not required in container environments.

The Persistence class is used to obtain a javax.persistence.PersistenceUtil instance in both Java EE and Java SE environments.
[中]用于在Java SE环境中获取EntityManagerFactory的引导类。它还可用于生成模式。
Persistence类也可以在JavaEE容器环境中使用；但是，在容器环境中不需要支持JavaSE引导API。
Persistence类用于获取javax。坚持不懈Java EE和Java SE环境中的PersistenceUtil实例。

代码示例

代码示例来源：origin: kiegroup/jbpm

@Before
public void beforeThis() { 
  emf = Persistence.createEntityManagerFactory("org.jbpm.logging.jta");
  logService = new JPAAuditLogService(emf);
}

代码示例来源：origin: Impetus/Kundera

@Before
public void setUp() throws Exception
{
  emf = Persistence.createEntityManagerFactory("hbaseTest");
  em = emf.createEntityManager();
}

代码示例来源：origin: Impetus/Kundera

@Test
public void validConstructorTest() throws Exception {
  emf = Persistence.createEntityManagerFactory("patest");
  em = emf.createEntityManager();
  BookEntity book = new BookEntity();
  book.setBookId(1);
  book.setTitle("The Complete Reference");
  book.setAuthor("Herbert Schildt");
  book.setPages(500);
  em.persist(book);
  em.clear();
  BookEntity book1 = em.find(BookEntity.class, 1);
  Assert.assertNotNull(book1);
  Assert.assertEquals(1, book1.getBookId());
  Assert.assertEquals("The Complete Reference", book1.getTitle());
  Assert.assertEquals("Herbert Schildt", book1.getAuthor());
  Assert.assertEquals(500, book1.getPages());
  em.remove(book1);
  BookEntity book2 = em.find(BookEntity.class, 1);
  Assert.assertNull(book2);
  em.close();
  emf.close();
}

代码示例来源：origin: Impetus/Kundera

@Before
public void setUp() throws Exception
{
  emf = Persistence.createEntityManagerFactory(persistenceUnit);
  em = emf.createEntityManager();
  
  em.getDelegate();
  
}

代码示例来源：origin: kiegroup/jbpm

@BeforeClass
public static void configure() {
  pds = setupPoolingDataSource();
  emf = Persistence.createEntityManagerFactory( "org.jbpm.services.task" );
  hackTheDatabaseMetadataLoggerBecauseTheresALogbackXmlInTheClasspath();
}

代码示例来源：origin: Impetus/Kundera

@Test
public void onLimit()
  emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
  EntityManager em = emf.createEntityManager();
  Map<String, Client> clients = (Map<String, Client>) em.getDelegate();
  Client client = clients.get(PERSISTENCE_UNIT);
  ((CassandraClientBase) client).setCqlVersion(CassandraConstants.CQL_VERSION_3_0);
  user1.setTweetBody("my first tweet");
  user1.setTweetDate(currentDate);
  em.persist(user1);
  user2.setTweetBody("my first tweet");
  user2.setTweetDate(currentDate);
  em.persist(user2);
  Query q = em.createQuery(noClause);
  List<PrimeUser> results = q.getResultList();
  Assert.assertNotNull(results);
  Assert.assertEquals(3, results.size());
  q = em.createQuery(noClause);
  q.setMaxResults(2);
  results = q.getResultList();
  Assert.assertNotNull(results);
  Assert.assertEquals(2, results.size());

代码示例来源：origin: Impetus/Kundera

/**
 * Setup.
 */
@Before
public void setup()
{
  emf = Persistence.createEntityManagerFactory("es-refresh-indexes-pu");
  em = emf.createEntityManager();
  /*
   * This property will force ES to refresh indexes on all the nodes after
   * insert, update and delete operations.
   * 
   */
  em.setProperty("es.refresh.indexes", true);
}

代码示例来源：origin: Impetus/Kundera

/**
 * Sets the up before class.
 * 
 * @throws Exception
 *             the exception
 */
@BeforeClass
public static void setUpBeforeClass() throws Exception
{
  emf = Persistence.createEntityManagerFactory(_PU);
  em = emf.createEntityManager();
}

代码示例来源：origin: Impetus/Kundera

@Test
public void testShowQueryDisabled() 
  emf = Persistence.createEntityManagerFactory(SHOW_QUERY_DISABLED_PU, puProperties);
  em = emf.createEntityManager();
  try
    Query q = em.createQuery("Select p.personName from UserInformation p where p.personId = 2");
    q.getResultList();
    System.setOut(printStream);
    q = em.createQuery("Select p.personName from UserInformation p where p.personId < 3");
    q.getResultList();
    System.setOut(printStream);
    q = em.createQuery("Select p.personName from UserInformation p where p.personId >= 1 and p.personId < 3");
    q.getResultList();
    System.setOut(printStream);
    Assert.assertEquals(isFileEmpty, true);
    em.close();
    emf.close();

代码示例来源：origin: Impetus/Kundera

EntityManagerFactory emfLucene = Persistence.createEntityManagerFactory("hbaseTest", puProperties);
EntityManager emLucene = emfLucene.createEntityManager();
emLucene.persist(p1);
emLucene.persist(p2);
emLucene.persist(p3);
Query q = emLucene.createQuery("Select p from PersonHBase p where p.personName = vivek1 OR p.age= 10");
List<PersonHBase> results = q.getResultList();
Assert.assertNotNull(results);
Assert.assertFalse(results.isEmpty());
Assert.assertEquals(1, results.size());
Assert.assertNotNull(results.get(0).getPersonId());
Assert.assertEquals("vivek", results.get(0).getPersonName());
    .createQuery("Select p.personId, p.personName from PersonHBase p where p.personName = vivek1 OR p.age= 10");
results = q.getResultList();
Assert.assertNotNull(results);
Assert.assertFalse(results.isEmpty());
emLucene.close();
emfLucene.close();

代码示例来源：origin: Impetus/Kundera

@Test
public void testShowQueryDisabled()
  emf = Persistence.createEntityManagerFactory(SHOW_QUERY_DISABLED_PU, puProperties);
  em = emf.createEntityManager();
  try
    Query findQuery = em.createQuery("Select s from UserInformation s", UserInformation.class);
    findQuery.getResultList();
    expectedQuery[0] = "SELECT * FROM \"USER\" LIMIT 100";
    System.setOut(printStream);
    findQuery = em.createQuery("Select s from UserInformation s where s.name = vivek");
    findQuery.getResultList();
    expectedQuery[1] = "SELECT * FROM \"USER\" WHERE \"name\" = 'vivek' LIMIT 100  ALLOW FILTERING";
    System.setOut(printStream);
    findQuery = em.createQuery("Select s.age from UserInformation s where s.name = vivek");
    findQuery.getResultList();
    expectedQuery[2] = "SELECT \"age\" FROM \"USER\" WHERE \"name\" = 'vivek' LIMIT 100  ALLOW FILTERING";
    System.setOut(printStream);
    Assert.assertTrue(actualQuery.indexOf(expectedQuery[0]) == -1
        && actualQuery.indexOf(expectedQuery[1]) == -1 && actualQuery.indexOf(expectedQuery[2]) == -1);
  em.close();
  emf.close();

代码示例来源：origin: Impetus/Kundera

+ " \"tweetDate\" timestamp, PRIMARY KEY(\"userId\",\"tweetId\",\"timeLineId\"))";
executeScript(cql_Query);
emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
EntityManager em = emf.createEntityManager();
user2.setNickName(NickName.KK);
em.persist(user1);
em.persist(user2);
em.clear();
Query query = em.createQuery(noClause);
List<PrimeUser> results = query.getResultList();
Assert.assertNotNull(results);
Assert.assertEquals(2, results.size());
Assert.assertNotSame(results.get(0).getKey(), results.get(1).getKey());
Assert.assertEquals(results.get(0).getKey().getUserId(), results.get(1).getKey().getUserId());
Assert.assertNotSame(results.get(0).getKey().getTimeLineId(), results.get(1).getKey().getTimeLineId());
em.createQuery(deleteQuery).executeUpdate();
query = em.createQuery(noClause);
results = query.getResultList();
Assert.assertTrue(results.isEmpty());

代码示例来源：origin: Impetus/Kundera

@Test
public void testMetadataQueries()
  EntityManagerFactory emf = Persistence.createEntityManagerFactory("dsscalar");
  EntityManager entityManager = emf.createEntityManager();
  String useNativeSql = "SELECT keyspace_name,table_name,column_name,kind,type FROM system_schema.columns"
      + " WHERE keyspace_name = 'KunderaExamples' AND table_name = 'PERSON'";
  Query q = entityManager.createNativeQuery(useNativeSql);
  List<Object[]> results = q.getResultList();
  Assert.assertNotNull(results);
  Assert.assertEquals(6, results.size());
  q = entityManager.createNativeQuery(useNativeSql);
  results = q.getResultList();
  Assert.assertNotNull(results);
  q = entityManager.createNativeQuery(useNativeSql);
  final List<Object> resultsSingle = q.getResultList();
  Assert.assertNotNull(results);
  entityManager.close();
  emf.close();

代码示例来源：origin: Impetus/Kundera

@Test
public void testShowQueryDisabled()
  emf = Persistence.createEntityManagerFactory(REDIS_PU);
  em = emf.createEntityManager();
    Query findQuery = em.createQuery("Select s from UserInformation s");
    findQuery.getResultList();
    System.setOut(printStream);
    findQuery = em.createQuery("Select p from UserInformation p where p.id=\"PK_1\"");
    findQuery.getResultList();
    System.setOut(printStream);
    findQuery = em.createQuery("Select p from UserInformation p where p.id=\"Shahid\"");
    findQuery.getResultList();
    System.setOut(printStream);
    Assert.assertEquals(isFileEmpty, true);

代码示例来源：origin: hibernate/hibernate-orm

doInJPA( this::entityManagerFactory, entityManager -> {
  Session session = entityManager.unwrap( Session.class );
  SessionImplementor sessionImplementor = entityManager.unwrap( SessionImplementor.class );
  SessionFactory sessionFactory = entityManager.getEntityManagerFactory().unwrap( SessionFactory.class );
  entityManager.createQuery( "delete from Book" ).executeUpdate();
  entityManager.createQuery( "delete from Person" ).executeUpdate();
doInJPA( this::entityManagerFactory, entityManager -> {
  Session session = entityManager.unwrap( Session.class );
  entityManager.createQuery( "delete from Book" ).executeUpdate();
  entityManager.createQuery( "delete from Person" ).executeUpdate();
  PersistenceUnitUtil persistenceUnitUtil = entityManager.getEntityManagerFactory().getPersistenceUnitUtil();
  PersistenceUtil persistenceUnitUtil = Persistence.getPersistenceUtil();

代码示例来源：origin: Impetus/Kundera

@Test
public void compositeKeytest()
{
  emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT, puProperties);
  em = emf.createEntityManager();
  UUID timeLineId = UUID.randomUUID();
  CassandraCompoundKey key = new CassandraCompoundKey("shahid", 1, timeLineId);
  CassandraPrimeUser user = new CassandraPrimeUser(key);
  user.setTweetBody("my first tweet");
  user.setTweetDate(currentDate);
  em.persist(user);
  CassandraPrimeUser user2 = new CassandraPrimeUser(key);
  user2.setTweetBody("my second tweet");
  user2.setTweetDate(currentDate);
  em.flush(); // optional,just to clear persistence cache.
  em.clear();
  CassandraPrimeUser u = em.find(CassandraPrimeUser.class, key);
  Assert.assertEquals("my first tweet", u.getTweetBody());
  em.merge(user2);
  u = em.find(CassandraPrimeUser.class, key);
  Assert.assertEquals("my second tweet", u.getTweetBody());
  em.remove(user2);
}

代码示例来源：origin: Impetus/Kundera

/**
 * @throws java.lang.Exception
 */
@BeforeClass
public static void setUpBeforeClass() throws Exception
{
  emf = Persistence.createEntityManagerFactory(PU);
  em = emf.createEntityManager();
  Map<String, Client> clients = (Map<String, Client>) em.getDelegate();
  client = (Neo4JClient) clients.get(PU);
}

代码示例来源：origin: Impetus/Kundera

@Test
public void onBatchInsert()
{
  emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
  EntityManager em = emf.createEntityManager();
  UUID timeLineId = UUID.randomUUID();
  for (int i = 0; i < 500; i++)
  {
    UserTimeLine key = new UserTimeLine("mevivs", i, timeLineId);
    Map<String, Client> clients = (Map<String, Client>) em.getDelegate();
    Client client = clients.get(PERSISTENCE_UNIT);
    ((CassandraClientBase) client).setCqlVersion(CassandraConstants.CQL_VERSION_3_0);
    PrimeUser user = new PrimeUser(key);
    user.setTweetBody("my first tweet");
    user.setTweetDate(currentDate);
    em.persist(user);
  }
  em.clear();
  PrimeUser u = em.find(PrimeUser.class, new UserTimeLine("mevivs", 499, timeLineId));
  Assert.assertNotNull(u);
}

代码示例来源：origin: Impetus/Kundera

@Test
public void testCreate()
{
  Map<String, Object> props = new HashMap<String, Object>();
  props.put(PersistenceProperties.KUNDERA_DDL_AUTO_PREPARE, "create");
  EntityManagerFactory emf = Persistence.createEntityManagerFactory("metaDataTest", props);
  Assert.assertTrue(CoreSchemaManager.validateAction("create"));
  emf.close();
  Assert.assertTrue(CoreSchemaManager.validateAction("create"));
  Assert.assertFalse(CoreSchemaManager.validateAction("drop"));
}

代码示例来源：origin: Impetus/Kundera

@Test
public void testUUID()
{
  EntityManagerFactory emf = Persistence.createEntityManagerFactory("cass_pu");
  UUID key = UUID.randomUUID();
  CassandraUUIDEntity entity = new CassandraUUIDEntity();
  entity.setAge(10);
  entity.setName("vivek");
  entity.setUuidKey(key);
  EntityManager em = emf.createEntityManager();
  em.persist(entity);
  CassandraUUIDEntity result = em.find(CassandraUUIDEntity.class, key);
  Assert.assertNotNull(result);
  Assert.assertEquals(key, result.getUuidKey());
  Assert.assertEquals("vivek", result.getName());
  Assert.assertEquals(new Integer(10), result.getAge());
}