Struts2+Hibernate基本配置及基本功能代码（附整理学习笔记）的代码详情-代码-最代码

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01package top.dragong;
02 
03import org.hibernate.*;
04import org.hibernate.cfg.*;
05import org.hibernate.service.*;
06 
07/** 
08 * Description: 
09 * @author  VipMao 
10 * @version  1.0 
11 */
12 
13/**
14 * 该工具类提供了一个属性：SessionFactory sessionFactory 并创建了sessionFactory 将它设置成static
15 * 这样其他程序就可以直接通过此工具类引用 提供了二个方法: 1：通过线程创建Session-->currentSession()
16 * 2：关闭Session-->closeSession() 需要在主类中手动关闭sessionFactory
17 */
18public class HibernateUtil {
19    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
20    private static final ThreadLocal<Session> sessionThreadLocal = new ThreadLocal<Session>();
21    private static Configuration configuration = new Configuration();
22    private static SessionFactory sessionFactory;
23    private static String configFile = CONFIG_FILE_LOCATION;
24    static {
25        configuration.configure();
26        ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties())
27                .applySettings(configuration.getProperties()).buildServiceRegistry();
28        sessionFactory = configuration.buildSessionFactory(serviceRegistry);
29 
30    }
31 
32    private HibernateUtil() {
33    }
34 
35    public static SessionFactory getSessionFactory() {
36        return sessionFactory;
37    }
38 
39    public static void rebuildSessionFactory() {
40        try {
41            configuration.configure(configFile);
42            ServiceRegistry serviceRegistry = new ServiceRegistryBuilder()
43                    .applySettings(configuration.getProperties())
44                    .buildServiceRegistry();
45            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
46        } catch (HibernateException e) {
47            e.printStackTrace();
48        }
49    }
50 
51    public static Session getSession() {
52        Session session = (Session) sessionThreadLocal.get();
53        try {
54            if (session == null || !session.isOpen()) {
55                if (sessionFactory == null) {
56                    rebuildSessionFactory();
57                }
58            }
59            session = (sessionFactory != null) ? sessionFactory.openSession() : null;
60            sessionThreadLocal.set(session);
61        } catch (HibernateException e) {
62            e.printStackTrace();
63        }
64        return session;
65    }
66 
67    public static void closeSession() {
68        Session session = (Session) sessionThreadLocal.get();
69        sessionThreadLocal.set(null);
70        try {
71            if (session != null && session.isOpen()) {
72                session.close();
73            }
74 
75        } catch (HibernateException e) {
76            e.printStackTrace();
77        }
78 
79    }
80 
81    public static void setConfigFile(String configFile) {
82        HibernateUtil.configFile = configFile;
83        sessionFactory = null;
84    }
85 
86    public static Configuration getConfiguration() {
87        return configuration;
88    }
89}