文件结构如下 开发工具myEclipse6.M1
代码（具体位置看package位置）
package com.lusm.hib.dao;
import org.hibernate.Session;
public interface IBaseHibernateDAO 
{
public Session getSession();
}package com.lusm.hib.dao.impl;
import org.hibernate.Session;
import com.lusm.hib.dao.IBaseHibernateDAO;
import com.lusm.hib.factory.HibernateSessionFactory;
public class BaseHibernateDAO implements IBaseHibernateDAO {
public Session getSession() {
return HibernateSessionFactory.getSession();
}
}
package com.lusm.hib.factory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
public class HibernateSessionFactory {
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HibernateSessionFactory() {
}
public static Session getSession() throws HibernateException {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void setConfigFile(String configFile) {
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
public static Configuration getConfiguration() {
return configuration;
}
}
package com.lusm.stu.dao;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import com.lusm.hib.dao.impl.BaseHibernateDAO;
import com.lusm.stu.vo.Student;
public class StudentDAO extends BaseHibernateDAO {
private static final Log log = LogFactory.getLog(StudentDAO.class);
// property constants
public static final String NAME = "name";
public void save(Student transientInstance) {
log.debug("saving Student instance");
try {
getSession().save(transientInstance);
log.debug("save successful");
} catch (RuntimeException re) {
log.error("save failed", re);
throw re;
}
}
public void delete(Student persistentInstance) {
log.debug("deleting Student instance");
try {
getSession().delete(persistentInstance);
log.debug("delete successful");
} catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
}
public Student findById(java.lang.Long id) {
log.debug("getting Student instance with id: " + id);
try {
Student instance = (Student) getSession().get(
"com.lusm.stu.vo.Student", id);
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public List findByExample(Student instance) {
log.debug("finding Student instance by example");
try {
List results = getSession().createCriteria(
"com.lusm.stu.vo.Student").add(Example.create(instance))
.list();
log.debug("find by example successful, result size: "
+ results.size());
return results;
} catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
}
public List findByProperty(String propertyName, Object value) {
log.debug("finding Student instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from Student as model where model."
+ propertyName + "= ?";
Query queryObject = getSession().createQuery(queryString);
queryObject.setParameter(0, value);
return queryObject.list();
} catch (RuntimeException re) {
log.error("find by property name failed", re);
throw re;
}
}
public List findByName(Object name) {
return findByProperty(NAME, name);
}
public List findAll() {
log.debug("finding all Student instances");
try {
String queryString = "from Student";
Query queryObject = getSession().createQuery(queryString);
return queryObject.list();
} catch (RuntimeException re) {
log.error("find all failed", re);
throw re;
}
}
public Student merge(Student detachedInstance) {
log.debug("merging Student instance");
try {
Student result = (Student) getSession().merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public void attachDirty(Student instance) {
log.debug("attaching dirty Student instance");
try {
getSession().saveOrUpdate(instance);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void attachClean(Student instance) {
log.debug("attaching clean Student instance");
try {
getSession().lock(instance, LockMode.NONE);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
}
package com.lusm.stu.vo;
public class Student implements java.io.Serializable {
private Long id;
private String name;
public Student() {
}
public Student(Long id, String name) {
this.id = id;
this.name = name;
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
}
Student.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="com.lusm.stu.vo.Student" table="STUDENT" schema="LUSM">
<id name="id" type="java.lang.Long">
<column name="ID" precision="22" scale="0" />
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String">
<column name="NAME" length="20" not-null="true" />
</property>
</class>
</hibernate-mapping>
package com.lusm.test;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import com.lusm.hib.factory.HibernateSessionFactory;
import com.lusm.stu.vo.Student;
public class Test {
public static void main(String[] args) {
Session session = HibernateSessionFactory.getSession();
String sql = "from Student";
Query query = session.createQuery(sql);
List list = query.list();
session.close();
Iterator i = list.iterator();
System.out.println("id"+"\t"+"name");
System.out.println("---------------");
while (i.hasNext()) {
Student stu = (Student) i.next();
System.out.println(stu.getId() + "\t" + stu.getName());
}
}
}
hibernate.cfg.xml
<?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">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">test</property>
<property name="connection.url">
jdbc:oracle:thin:@localhost:1521:oracle
</property>
<property name="dialect">
org.hibernate.dialect.Oracle9Dialect
</property>
<property name="myeclipse.connection.profile">
Oracle
</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">
oracle.jdbc.OracleDriver
</property>
<property name="show_sql">true</property>
<mapping resource="com/lusm/stu/vo/Student.hbm.xml" />
</session-factory>
</hibernate-configuration>
运行结果是
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate: select student0_.ID as ID0_, student0_.NAME as NAME0_ from LUSM.STUDENT student0_
id name
---------------
1 aaaaa
2 bbbbb
3 ccccc
请注意：如果你在运行过程中出现找不到HibernateSessionFactory，或者提示日志文件错误时候，请看下个文章！
地震让大伙知道：居安思危，才是生存之道。
posted on 2007-09-14 21:37
小寻 阅读(866)
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