Hibernate学习笔记（简单的Hibernate环境搭建）
导入Hibernate3.3环境所需的架包.
建立Person类（使用注解方式）：
public class Person {@Id@GeneratedValue(strategy=GenerationType.IDENTITY)@Column(name="ID")private Integer id;@Column(name="NAME",length=100,nullable=false)private String name;@Column(name="DATE",nullable=false)private Date date; public Person(Integer id, String name, Date date) {this.id = id;this.name = name;this.date = date;} //get/set@Overridepublic String toString() {return id + "," + name + "," + date;}}package org.savior;import java.util.List;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.AnnotationConfiguration;import org.hibernate.cfg.Configuration;public class PersonDaoImpl implements PersonDao {private SessionFactory sessionFactory;public PersonDaoImpl() {Configuration cg = new AnnotationConfiguration().configure();sessionFactory = cg.buildSessionFactory();}public void delete(Person person) {Session session = sessionFactory.openSession();Transaction tx = session.beginTransaction();try {tx.begin();session.delete(person);tx.commit();} catch (RuntimeException e) {tx.rollback();throw e;} finally {session.close();}}@SuppressWarnings("unchecked")public List<Person> findAll() {Session session = sessionFactory.openSession();try {Query q = session.createQuery("from Person");return q.list();} finally {session.close();}}public Person findById(int personId) {Session session = sessionFactory.openSession();return (Person) session.get(Person.class, personId);}public void save(Person person) {Session session = sessionFactory.openSession();Transaction tx = session.beginTransaction();try {tx.begin();session.saveOrUpdate(person);tx.commit();} catch (RuntimeException e) {tx.rollback();throw e;} finally {session.close();}}public void update(Person person) {Session session = sessionFactory.openSession();Transaction tx = session.beginTransaction();try {tx.begin();session.update(person);tx.commit();} catch (RuntimeException e) {tx.rollback();throw e;} finally {session.close();}}}package org.savior;import java.util.GregorianCalendar;import java.util.Iterator;import java.util.List;public class textHibernate {/** * @param args */public static void main(String[] args) {PersonDao personDao = new PersonDaoImpl();Person person = new Person();person.setName("savior");person.setDate(new GregorianCalendar(2011, 1, 1).getTime());personDao.save(person);List<Person> persons = personDao.findAll();for(Iterator<Person> it=persons.iterator();it.hasNext();){person=(Person)it.next();System.out.println(person);}Integer id=persons.get(0).getId();person=personDao.findById(id);System.out.println(person);//personDao.delete(person);person.setName("puppy");personDao.update(person);System.out.println(person);}}<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost:3307/test</property> <property name="connection.username">root</property> <property name="connection.password">123</property> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="show_sql">true</property> <property name="hbm2ddl.auto">update</property> <mapping /> </session-factory> </hibernate-configuration>