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hibernate的SessionManager

import ?org.apache.commons.logging.Log;
?2

import ?org.apache.commons.logging.LogFactory;
?3

import ?org.hibernate.FlushMode;
?4

import ?org.hibernate.HibernateException;
?5

import ?org.hibernate.Session;
?6

import ?org.hibernate.SessionFactory;
?7

import ?org.hibernate.Transaction;
?8

import ?org.hibernate.cfg.Configuration;
?9

public ? class ?SessionManager? {
13

???? private ? static ?Log?log? = ?LogFactory.getLog(SessionManager. class );
14

???? private ? static ? final ?SessionFactory?sessionFactory;
15

???? /** 靜態塊：創建session?factory */
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???? static ? {
17

???????? try ? {
18

????????????System.out.println( " 數據映射初始化

begin " );
19

????????????Configuration?configure? = ? new ?Configuration().configure();
20

????????????sessionFactory? = configure.buildSessionFactory();
21

???????????? /* URL?configFileURL?=
22

????????????????????SessionManager.class.getResource("/hibernate.cfg.xml");
23

????????????Configuration?configure?=?(new?Configuration()).configure(configFileURL); */
24

????????????System.out.println( " 數據映射初始化

end " );
25

????????} ? catch ?(Throwable?ex)? {
26

????????????log.error( " Initial?SessionFactory?creation?failed. " ,?ex);
27

???????????? throw ? new ?ExceptionInInitializerError(ex);
28

????????}
29

????}
30

???? /** 獲取當前線程的session對象 */
31

???? public ? static ?Session?currentSession()? throws ?HibernateException? {
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????????Session?s? = ?sessionFactory.openSession();
33

????????s.setFlushMode(FlushMode.NEVER);
34

???????? return ?s;
35

????}
36

???? public ? static ?Session?currentSessionFlush()? throws ?HibernateException? {
37

????????Session?s? = ?sessionFactory.openSession();
38

????????s.setFlushMode(FlushMode.AUTO);
39

???????? return ?s;
40

????}
41

???? /** 關閉當前線程所在的session對象 */
42

???? public ? static ? void ?closeSession(Session?s)? throws ?HibernateException? {
43

???????? if ?(s? != ? null ) {
44

????????????s.close();
45

????????}
46

????}
47

???? public ? static ?SessionFactory?getSessionFactory()? {
48

???????? if (sessionFactory != null ) {
49

???????????? return ?sessionFactory;
50

????????}
51

???????? else {
52

????????????System.out.println( " 無效的factiory " );
53

???????????? return ? null ;
54

????????}
55

????}
56

}
57

posted on 2007-09-03 09:23 crazy 閱讀(391) 評論(0) 編輯收藏所屬分類: hibernate

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