Persistence (Java EE 5)

Java EE API

previous page next page
Overview  Package   Class  Tree  Deprecated  Index  Help 
 PREV CLASS   NEXT CLASS FRAMES    NO FRAMES    
SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD

javax.persistence Class Persistence

java.lang.Object
  extended by javax.persistence.Persistence

public class Persistence
extends Object


用于获取 EntityManagerFactory 的 Bootstrap 类。
since
en
Java Persistence 1.0
英文文档：

Bootstrap class that is used to obtain an EntityManagerFactory.

Since:
Java Persistence 1.0

Field Summary
static String PERSISTENCE_PROVIDER
           
protected static Set<PersistenceProvider> providers
           
 
Constructor Summary
Persistence()
           
 
Method Summary
static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName)
          Create and return an EntityManagerFactory for the named persistence unit.
static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties)
          Create and return an EntityManagerFactory for the named persistence unit using the given properties.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

英文文档：

PERSISTENCE_PROVIDER 

public static final String PERSISTENCE_PROVIDER
See Also:
Constant Field Values

英文文档：

providers 

protected static final Set<PersistenceProvider> providers
Constructor Detail

public Persistence()
英文文档：

Persistence

public Persistence()
Method Detail

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName)
创建并返回指定持久性单元的 EntityManagerFactory。
persistenceUnitName 持久性单元的名称
return 创建根据指定的持久性单元配置的 EntityManager 的工厂
英文文档：

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName)
Create and return an EntityManagerFactory for the named persistence unit.

Parameters:
persistenceUnitName - The name of the persistence unit
Returns:
The factory that creates EntityManagers configured according to the specified persistence unit

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, java.util.Map<K, V> properties)
使用给定属性创建并返回指定持久性单元的 EntityManagerFactory。
persistenceUnitName 持久性单元的名称
properties 创建工厂时使用的其他属性。这些属性值将重写在其他位置配置的任何值。
return 创建根据指定持久性单元配置的 EntityManager 的工厂。
英文文档：

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName,
                                                              Map properties)
Create and return an EntityManagerFactory for the named persistence unit using the given properties.

Parameters:
persistenceUnitName - The name of the persistence unit
properties - Additional properties to use when creating the factory. The values of these properties override any values that may have been configured elsewhere.
Returns:
The factory that creates EntityManagers configured according to the specified persistence unit.
Overview  Package   Class  Tree  Deprecated  Index  Help 
 PREV CLASS   NEXT CLASS FRAMES    NO FRAMES    
SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD
Submit a bug or feature

Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.

一看就知道只有菜鸟才干这么无知的事啦。

PS : 未经我党受权你也可自由散发此文档。 如有任何错误请自行修正；若因此而造成任何损失请直接找人民主席，请勿与本人联系。谢谢！

previous page start next page