Hibernate之AbstractEntityPersister

1. <?xml version=‘1.0‘ encoding=‘utf-8‘?>
2. <!DOCTYPE hibernate-configuration PUBLIC
3. "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
4. "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
5. <hibernate-configuration>
6. <session-factory>
7. <!-- Database connection settings -->
8. <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
9. <property name="connection.url">jdbc:mysql://localhost:3306/ehome</property>
10. <property name="connection.username">root</property>
11. <property name="connection.password">mysql</property>
12. <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
13. <property name="current_session_context_class">thread</property>
14. <property name="show_sql">true</property>
15. <mapping resource="org/bkgd/ehome/jeeplugin/userapp/domain/HhArticle.hbm.xml" />
16. </session-factory>
17. </hibernate-configuration>

HhArticle.hbm.xml 文件在此省略

编写HibernateUtil辅助类 获取sessionFactory

[java] view plaincopy

1. public class HibernateUtils {
2. private static final SessionFactory sessionFactory;;
3. //创建sessionFactory
4. static {
5. try {
6. sessionFactory = new Configuration().configure().buildSessionFactory();
7. } catch (Throwable ex) {
8. System.err.println("Initial SessionFactory creation failed." + ex);
9. throw new ExceptionInInitializerError(ex);
10. }
11. }
12. public static SessionFactory getSessionFactory() {
13. return sessionFactory;
14. }
15. }

测试类

[java] view plaincopy

1. public class TestPersister {
2. private static AbstractEntityPersister classMetadata;
3. private Object obj;
4. public TestPersister(SessionFactory sessionFatory, Object obj) {
5. classMetadata = (AbstractEntityPersister) sessionFatory.getClassMetadata(obj.getClass());
6. this.obj = obj;
7. }
8. /**
9. * @param args
10. */
11. public static void main(String[] args) {
12. //实例化classMetadata   传入sessionFactory和obj对象
13. TestPersister tp = new TestPersister(HibernateUtils.getSessionFactory(),new HhArticle());
14. Session session = HibernateUtils.getSessionFactory().getCurrentSession();
15. session.beginTransaction();
16. SQLQuery sqlquery = session.createSQLQuery("DELETE FROM " + classMetadata.getTableName());
17. sqlquery.executeUpdate();
18. session.getTransaction().commit(); //事务提交
19. //classMetadata一些其他操作
20. System.out.println(classMetadata.getTableName());  //表名
21. System.out.println(classMetadata.getIdentifierPropertyName()); //主键列映射属性
22. System.out.println(classMetadata.getEntityName()); //对象名称
23. for(String str:classMetadata.getPropertyNames()){   //非主键属性
24. System.out.println(str);
25. }
26. }
27. public AbstractEntityPersister getClassMetadata() {
28. return classMetadata;
29. }
30. public void setClassMetadata(AbstractEntityPersister classMetadata) {
31. this.classMetadata = classMetadata;
32. }
33. public Object getObj() {
34. return obj;
35. }
36. public void setObj(Object obj) {
37. this.obj = obj;
38. }
39. }