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数据库表地址数据�Q�中国地区）

G_G — Thu, 29 May 2008 02:51:00 GMT

摘要: 为方侉K��目��用，特留�Q�表�l�构�Q�Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> CREATE TABLE `location` ( `id` bigint(20) NOT NULL auto_increment, `name` varchar(50... 阅读全文

G_G 2008-05-29 10:51 发表评论

spring �?hibernate 整合(事务)

G_G — Fri, 09 May 2008 05:47:00 GMT

参考：�W��? 章事务管�?- Spring Framework reference 2.0.5 参考手册中文版
http://doc.javanb.com/spring-framework-reference-zh-2-0-5/ch09.html

先从配置文�g开始：
源码�Q?a href="/Files/Good-Game/springAop.rar">springAop.rar

需要jar

xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="java"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="lib" path="lib/aspectjrt.jar"/>
    <classpathentry kind="lib" path="lib/aspectjweaver.jar"/>
    <classpathentry kind="lib" path="lib/spring.jar"/>
    <classpathentry kind="lib" path="lib/spring-sources.jar"/>
    <classpathentry kind="lib" path="lib/commons-logging-1.0.4.jar"/>
    <classpathentry kind="lib" path="lib/cglib-nodep-2.1_3.jar"/>
    <classpathentry kind="lib" path="lib/hibernate3.jar"/>
    <classpathentry kind="lib" path="lib/log4j-1.2.11.jar"/>
    <classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
    <classpathentry kind="lib" path="lib/dom4j-1.6.1.jar"/>
    <classpathentry kind="lib" path="lib/commons-collections-2.1.1.jar"/>
    <classpathentry kind="lib" path="lib/mysql.jar"/>
    <classpathentry kind="lib" path="lib/jta.jar"/>
    <classpathentry kind="lib" path="lib/antlr-2.7.6.jar"/>
    <classpathentry kind="output" path="bin"/>
classpath>

spring 配置

xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">



  <bean id="beanDao" class="dao.imp.BeanDaoImp">
      <property name="sessionFactory">
          <ref bean="sessionFactory">ref>
      property>
  bean>



   <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

       <property name="configLocation" value="classpath:hibernate.cfg.xml" />
   bean>


   <aop:config>

         <aop:pointcut id="aopBean" expression="execution(* *.*.*(..))"/>
           <aop:advisor advice-ref="txAdvice" pointcut-ref="aopBean" />
      aop:config>


       <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
      <property name="sessionFactory" ref="sessionFactory" />
    bean>


      <tx:advice id="txAdvice" transaction-manager="txManager">
           <tx:attributes>
             <tx:method name="get*" read-only="true"/>
          <tx:method name="*" />
        tx:attributes>
      tx:advice>

beans>

hibernate 配置

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 name="asdf">
    <property name="hibernate.dialect">mysqlproperty>
    <property name="myeclipse.connection.profile">
        com.mysql.jdbc.Driver
    property>
    <property name="connection.url">
        jdbc:mysql://localhost/aop
    property>
    <property name="show_sql">trueproperty>

    <property name="connection.username">rootproperty>
    <property name="connection.password">property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect
    property>

    <mapping resource="bean/UnitBean.hbm.xml" />

session-factory>
hibernate-configuration>

dao �c�（接口�Q?br />

package dao.imp;

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import bean.UnitBean;

import dao.BeanDao;

public class BeanDaoImp extends HibernateDaoSupport implements BeanDao{
    public void addBean(UnitBean unitBean) {
        this.getHibernateTemplate().save(unitBean);
    }

    public List<UnitBean> getBeanByAll() {
        return this.getHibernateTemplate().find(" from "+UnitBean.class.getName());
    }

    public void removeBean(long beanId) {
        this.getHibernateTemplate().delete(
                getHibernateTemplate().get(UnitBean.class, beanId)
            );
    }

}

Main �c?br />

package unit;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import dao.BeanDao;
import bean.UnitBean;

public class Main {
    public static void main(String[] args) {
           ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
           BeanDao dao = (BeanDao) ctx.getBean("beanDao");
           UnitBean bean = new UnitBean();
           bean.setName("xx");
           bean.setPass("11");
           dao.addBean(bean);

           for(UnitBean unitBean : dao.getBeanByAll() ){
               System.out.println( unitBean.getId() );
           }

           dao.removeBean(bean.getId());

    }
}

�l�果�Q?br />Hibernate: insert into bean (name, pass) values (?, ?)
Hibernate: select unitbean0_.id as id0_, unitbean0_.name as name0_, unitbean0_.pass as pass0_ from bean unitbean0_
1
Hibernate: select unitbean0_.id as id0_0_, unitbean0_.name as name0_0_, unitbean0_.pass as pass0_0_ from bean unitbean0_ where unitbean0_.id=?
Hibernate: delete from bean where id=?

G_G 2008-05-09 13:47 发表评论

G_G — Sat, 26 Apr 2008 10:30:00 GMT

摘要: level �c�：Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->package hbm;import java.util.Set;/** * @hibernate.class table = "level" * where = " visible = ... 阅读全文

G_G 2008-04-26 18:30 发表评论

Hibernate �U�联��d��删除

G_G — Wed, 02 Apr 2008 02:07:00 GMT

问题描述�Q�实体类�{�案从属于实体类问题。（一对多�Q?br /> 效果-�?br />

    /**
     * ��d�� 问题和选项
     * @throws Exception
     */@Test
    public void testQu() throws Exception {
        Session session = HibernateUtil.currentSession();
        Transaction tr = session.beginTransaction();

        //�U�联��d��
        Set options = new HashSet();
        Options op1 = new Options();
        op1.setName("op1");
        options.add(op1);


        Options op2 = new Options();
        op2.setName("op2");
        options.add(op2);


        Options op3 = new Options();
        op3.setName("op3");
        options.add(op3);
        Problems problems = new Problems();

        problems.setName("problem_1");
        problems.setOptions(options);
        problems.setTdesc("tdesc");
        problems.setType(1);

        Long ll = (Long)session.save(problems);


        System.out.println(ll);
        tr.commit();

mysql> select * from options ;
+----+------------+--------+------+---------+
| id | problemsid | answer | name | visible |
+----+------------+--------+------+---------+
| 1 |          1 |   NULL | op2 |       0 |
| 2 |          1 |   NULL | op3 |       0 |
| 3 |          1 |   NULL | op1 |       0 |
+----+------------+--------+------+---------+
3 rows in set (0.00 sec)

mysql> select * from problems ;
+----+-----------+------+-------+------------+---------+
| id | name      | type | tdesc | questionid | visible |
+----+-----------+------+-------+------------+---------+
| 1 | problem_1 |    1 | tdesc |       NULL |       0 |
+----+-----------+------+-------+------------+---------+
1 row in set (0.00 sec)


        //�U�联删除
        tr.begin();
            session.delete( session.get(Problems.class,ll) );
        tr.commit();

mysql> select * from problems ;
Empty set (0.00 sec)

mysql> select * from options ;
Empty set (0.00 sec)

        HibernateUtil.closeSession();
    }

Options�c?br />

.......
    /**
     * @hibernate.many-to-one
     *         cascade = "save-update"
     *         column = "Problemsid"
     *         class = "com.zhongqi.domain.Problems"
     * @return
     */
    public Problems getProblems() {
        return problems;
    }
............

Problems �c?br />

    /**
     * @hibernate.set
     *         cascade="all-delete-orphan"
     *         inverse = "false"
     *         lazy = "true"
     *         @hibernate.collection-key  column = "problemsid"
     *         @hibernate.collection-one-to-many class = "com.zhongqi.domain.Options"
     * @return
     */
    public Set getOptions() {
        return options;
    }

G_G 2008-04-02 10:07 发表评论

mysql Blob hbn 操作

G_G — Mon, 28 Jan 2008 01:53:00 GMT

1.数据�?br />

2.代码

        //插入
        Session sess =  HibernateSessionFactory.getSession();
        Transaction tr = sess.beginTransaction();
        LotteryNew nn = new LotteryNew();
        nn.setInputTime(new Date());
        nn.setCategories("t");
        nn.setTitle("new");
        nn.setRecommended(true);
        Blob bo = Hibernate.createBlob("ggggg".getBytes());
        nn.setContent(bo);
        sess.save(nn);
        tr.commit();
        HibernateSessionFactory.closeSession();

        //修改
        sess =  HibernateSessionFactory.getSession();
        tr = sess.beginTransaction();
        LotteryNew lo = (LotteryNew) sess.get(LotteryNew.class, nn.getId());
        Blob bog = Hibernate.createBlob("xxxxx".getBytes());
        lo.setContent(bog);
        tr.commit();
        HibernateSessionFactory.closeSession();

        //查找
        sess =  HibernateSessionFactory.getSession();
        LotteryNew lo2 = (LotteryNew) sess.get(LotteryNew.class, lo.getId());
        InputStream in = lo2.getContent().getBinaryStream() ;
        byte[] bbr = new byte[in.available()];
        in.read(bbr);
        System.out.println(new String(bbr));
        HibernateSessionFactory.closeSession();

G_G 2008-01-28 09:53 发表评论

hbn �l�承关系映射_1

G_G — Wed, 26 Dec 2007 03:41:00 GMT

摘要: ��试着�l�承关系和xdoclet使用后，�Ҏ��据库面向对象的��用更�q�一步。这�ơ例子从开始到�l�束�Q�都没有接触面向�l�构的数据库设计�Q��ƈ完全在代码中以面向对象的形式来设计的。hbn 的��承映��关�p�L��q�几�U�；�l�承关系�c�d��同��用一个表�Q? 每个子类一个表(mapping�?�Q? 每个具体内一个表�Q�mapping只有父类�Q�。先说说3把，感觉�q�点最好用-》》��承关�p�L��q�ͼ� Animals父类 -- Bird ... 阅读全文

G_G 2007-12-26 11:41 发表评论

hibernate + Myeclipes 敏捷(��例)

G_G — Tue, 11 Dec 2007 09:51:00 GMT

对hbn深入�q�程中，发现开发和设计持久�?到项目后期，��来��困难。在�ơ仔�l�查分析。特�ȝ��一�U�开发方法。留下与大家分��n�Q�欢�q�拍砖�?br />
开发过�E�描�q�ͼ�
1.使用 MyEclipes -> uml 创徏�c�d��
2.�?Generate java Code �Ҏ��c�d��生成 java文�g
3.使用 Xdoclet ��d�� Hbn 标签
4.配置myEclipes -> XDoclet 自动生成 mapping.hbn.xml
5.使用myEclipes 把项目�{化成 hibernate ��目
6.使用 org.hibernate.tool.hbm2ddl.SchemaExport ��

开发过�E�好处：
1�Q�完全是面向对象�Q�不需要写xml配置文�g(XDoclet);
2)��目后期修改�Ҏ��面对uml
3�Q�用myEclipes �q�些都不用去找，直接拿来�?uml,XDoclet,hibernate ..)

下面��来�?��例�?
1.MyEclipes 使用 uml 参�?>MyEclipse 5.5 UML 入门视频 (作者：BeanSoft)

2.由uml生成�c�L��?

3.先��?eclipes�?快键�Ҏ��?get/set �Ҏ��Q?�c�L��件文件添�?hbn XDoclet的注�?br />

package bean;

/**
* @hibernate.class table="t1oo"
*/
public class T1oo {

  public int id;
  public String name;
  public int avg;

  /**
   * @hibernate.property
   * column="avg"
   * length="4"
   * not-null="true"
   */
public int getAvg() {
    return avg;
}
public void setAvg(int avg) {
    this.avg = avg;
}
/**
* @hibernate.id
* column="id"
* generator-class="hilo"
*/
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
/**
* @hibernate.property
* column="name"
* not-null="true"
* @return
*/
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}


}

4.用myEclipes 生成 XDoclet
在项目点右键-> properties -> MyEclipse-XDoclet ->
在Configuration �I�白初点右键 �?add standard -> ... hbn 后面不太好描�q?可以查下很简单的。配�|�好了运行后��可以看�?多了 �?T1oo.hbm.xml 文�g;

5.myEclipes + hbn ��׃��多说�?br />6. hbn2java:

    public void testCreateTable()throws Exception{
         HibernateSessionFactory.currentSession();
         HibernateSessionFactory.closeSession();

         Field[] ff = HibernateSessionFactory.class.getDeclaredFields();
         Field fie = null ;
         for(int i=0;i<ff.length;i++){
             if( ff[i].getType().equals( Configuration.class ) ){
                 fie = ff[i];
             }
         }
         fie.setAccessible(true);
         Configuration cfg = (Configuration)fie.get(HibernateSessionFactory.class);
         cfg.addInputStream( this.getClass().getResourceAsStream("/bean/T1oo.hbm.xml") );
         //��
          SchemaExport dbExport = new SchemaExport(cfg);
          dbExport.setOutputFile("c:\\db\\test.txt");
          dbExport.create(true, true);
    }

sql�Q?br />drop table if exists t1oo
drop table if exists hibernate_unique_key
create table t1oo (
    id integer not null,
    avg integer not null,
    name varchar(255) not null,
    primary key (id)
)
create table hibernate_unique_key (
     next_hi integer
)
insert into hibernate_unique_key values ( 0 )

效果�Q?br />mysql> show tables;
+----------------------+
| Tables_in_hbn        |
+----------------------+
| hibernate_unique_key |
| t1oo                 |
+----------------------+
2 rows in set (0.00 sec)

G_G 2007-12-11 17:51 发表评论

hibernate 查询语句�ȝ��

G_G — Mon, 10 Dec 2007 04:52:00 GMT

表关�p?T1oo ->ont-to-many-> T2oo (t1oo.id-t2oo.aid)

1.单条select延迟加蝲

        Iterator it = session.createQuery("from T1oo ").iterate();
        while(it.hasNext()){
            T1oo t1 = (T1oo)it.next();
            t1.getName();
        }
/*�q�行语句 n+1
�q�就只加�?id
Hibernate: select t1oo0_.id as col_0_0_ from t1oo t1oo0_
此是�?t1.getName(); 延迟加蝲�?
Hibernate: select t1oo0_.id as id0_, t1oo0_.name as name0_0_ from t1oo t1oo0_ where t1oo0_.id=?
Hibernate: select t1oo0_.id as id0_, t1oo0_.name as name0_0_ from t1oo t1oo0_ where t1oo0_.id=?
*/

2.�U�连查询�Q?br />1)set排序从大到小
2�Q�batch-size="10" 用法�?
select * from t2oo where aid in (?,?,?....)
3)

如果惛_��略�g�q�，�q�有一定逻辑全部加蝲�Q�这有两中解军_��法：
1).内连

mysql> select   *
    -> from t1oo t1oo0_ inner join t2oo t2ooset1_ on t1oo0_.id=t2ooset1_.aid;
+----+-----------+----+-----+------+---------+
| id | name      | id | avg | aid | version |
+----+-----------+----+-----+------+---------+
| 1 | liukaiyi | 1 | 23 |    1 |       1 |
| 1 | liukaiyi | 2 | 24 |    1 |       1 |
| 1 | liukaiyi | 3 | 25 |    1 |       1 |
| 2 | liukaiyi2 | 4 | 26 |    2 |       0 |
+----+-----------+----+-----+------+---------+

Iterator it = new HashSet(session.createQuery("from T1oo t1 inner join fetch t1.t2ooSet t2where t2.id<=3").list()).iterator();
        while(it.hasNext()){
            T1oo t1 = (T1oo)it.next();
            System.out.println(t1.getName());

            for(Iterator itr=t1.getT2ooSet().iterator();itr.hasNext(); ){
                T2oo t2 = (T2oo)itr.next();
                System.out.println("  "+ t2.getAvg() );
            }
        }

�l�果是：

Hibernate: select t1oo0_.id as id0_, t2ooset1_.id as id1_, t1oo0_.name as name0_0_, t2ooset1_.version as version1_1_, t2ooset1_.avg as avg1_1_, t2ooset1_.aid as aid1_1_, t2ooset1_.aid as aid0__, t2ooset1_.id as id0__ from t1oo t1oo0_ inner join t2oo t2ooset1_ on t1oo0_.id=t2ooset1_.aid where t2ooset1_.id<=3
liukaiyi
  24
  23
  25

G_G 2007-12-10 12:52 发表评论

hibernate cache2

G_G — Fri, 07 Dec 2007 07:36:00 GMT

在hibernate.cfg.xml 中添加缓存�?t1oo 一对多 t2oo (t2ooSet)

    <property name="cache.provider_class">org.hibernate.cache.EhCacheProviderproperty>
    <property name="hibernate.cache.use_query_cache">trueproperty>

    <mapping resource="hbn/bean/T1oo.hbm.xml" />
    <mapping resource="hbn/bean/T2oo.hbm.xml" />

    <class-cache class="hbn.bean.T1oo" usage="read-only" />
    <collection-cache collection="hbn.bean.T1oo.t2ooSet" usage="read-only" />
    <class-cache class="hbn.bean.T2oo" usage="read-only" />

在src根目录下 ehcache.xml

xml version="1.0" encoding="UTF-8"?>
<ehcache>
    <diskStore path="java.io.tmpdir"/>
    <defaultCache
        maxElementsInMemory="10000" //最大缓存数�?/font>
        eternal="false"�Q?-- �~�存是否持久 --�Q?/font>
        timeToIdleSeconds="120" �Q?-- 当缓存闲�|�n�U�后销�?--�Q?/font>
        timeToLiveSeconds="120"�Q?-- 当缓存存�z�n�U�后销�?-�Q?/font>
        overflowToDisk="true"�Q?-- 是否保存到磁盘，当系�l�当机时--�Q?/font>
        diskPersistent="false"
        diskExpiryThreadIntervalSeconds="120"/>

    <cache
     name="hbn.bean.T1oo"
     maxElementsInMemory="450"
     eternal="false"
     timeToLiveSeconds="600"
     overflowToDisk="true"/>

ehcache>

��试�Q?br />

    public void testCa()throws Exception{
        System.out.println( getT1ooAll() );

        Thread.sleep(2*1000);

        System.out.println( getT1ooAll() );
    }

控制台输�?br />

Hibernate: select t1oo0_.id as id, t1oo0_.name as name0_ from t1oo t1oo0_ limit ?

Hibernate: select t2ooset0_.aid as aid1_, t2ooset0_.id as id1_, t2ooset0_.id as id0_, t2ooset0_.version as version1_0_, t2ooset0_.avg as avg1_0_, t2ooset0_.aid as aid1_0_ from t2oo t2ooset0_ where t2ooset0_.aid=?
Hibernate: select t2ooset0_.aid as aid1_, t2ooset0_.id as id1_, t2ooset0_.id as id0_, t2ooset0_.version as version1_0_, t2ooset0_.avg as avg1_0_, t2ooset0_.aid as aid1_0_ from t2oo t2ooset0_ where t2ooset0_.aid=?
24 : 23 : 25 : 2

//在这�~�存成功没向数据库提�?sql语句
24 : 23 : 25 : 2

G_G 2007-12-07 15:36 发表评论

hibernate 多服务器数据同步问题�Q�支持�g�q�同步）

G_G — Mon, 03 Dec 2007 03:29:00 GMT

本文是本人实际开发中遇到�Q�特留文记录。在�ơ我�׃��3天的旉��解决�Q�这个问题还是点隑ֺ�的�?br />
所用到知识点：
一般jdk
|-�U�有属性反��?br />|-序列�?br />|-正则表达使用
|-多线�E��?br />|-dom4j的xml��d��
|+hibernate
   |-拦截�?br />   |-一个Session工厂同时�q�接不同数据库（本文关键�Q?br />   |-oracle Blob 存取

�{?.......

需求功能介�l�：
为性能考虑�Q�单一服务器改成集��（每太服务器数据允许在一定时间内保持相步�Q�，�l�出的修�Ҏ��间短�Q�不�q�代码持久层比较�l�一�Q�hibernate 感谢天还好是她！ �Q�。网�l�连接不�E�_��Q�铁路内�|�！�Q��?br />
完成后效果：
当网�l�连接成功时�Q�多数据库的同步�?br />   �?/font>�|�络�q�接��p�|�Ӟ��本地应用�E�序�q�用hibernate拦截器拦截正操作对象�q�记录下操作动作�Q�序列化到本地时局�?z_jcyy_tb 表中。表数据属性�ؓ�Q�id,inputdate(记录旉��),object�Q�序列对象）,action(操作动作)。�ƈ安一定时间测试连接。如果成功，��d�� z_jcyy_tb 表中数据反序列化再同步到其他数据库中�?br />
代码说明�Q?br />1.新Session 建立
   hibernate.cfg.xml 在文�?/font>

中添�?

    <property name="connection.url_b">jdbc:oracle:thin:@192.168.1.114:1521:JCYYproperty>

    <property name="connection.username_b">jcyyproperty>
    <property name="connection.password_b">jcyyproperty>

TBDao -> OpenSession()

    private static String url_b = null ;
    private static String use_b = null ;
    private static String pass_b = null ;
    private static String dirver_b = null ;
    static {try {
        //取得hibernate.cfg.xml逻辑路径�Q�和原来�E�序兌��上�?
        Field field   =   SessionManager.class.getDeclaredField("CONFIG_FILE_LOCATION");
        field.setAccessible( true );
        String path  =  (String) field.get(SessionManager. class );

        //通过 dom4j 加蝲配置文�g
        Document docT = new SAXReader().read( TBDao.class.getResourceAsStream(path) );

        //正则+xpath��d�� 在hbn文�g中加入的<property name="..._b"> 的属�?/font>
        String xpath = "/hibernate-configuration/session-factory/property[@name='XPATH_I']" ;
        Pattern p = Pattern.compile("(XPATH_I)");
        Matcher ma = p.matcher(xpath);
        url_b  = DocumentHelper.createXPath( ma.replaceAll("connection.url_b") ).selectSingleNode(docT).getText();
        use_b = DocumentHelper.createXPath( ma.replaceAll("connection.username_b")).selectSingleNode(docT).getText();
        pass_b = DocumentHelper.createXPath( ma.replaceAll("connection.password_b")).selectSingleNode(docT).getText();
        dirver_b = DocumentHelper.createXPath( ma.replaceAll("connection.driver_class")).selectSingleNode(docT).getText();
    } catch (Exception e) {e.printStackTrace();}}

    //利用hbn的SessionFactory得到 openSession(Connection); 打开异地数据库连接�?
    //利用�U�有反射得到加蝲完成的SessionFactory
    public Session openSessionb(){
        try {
            Class.forName(dirver_b);
            Connection conn =  DriverManager.getConnection(url_b,use_b,pass_b);

            Field[] fields   =   SessionManager.class.getDeclaredFields();
            Field field = null ;
            for(int i=0;i<fields.length;i++){
                if( SessionFactory.class.equals(  fields[i].getType() )  )
                    field = fields[i];
            }
            field.setAccessible(true);
            SessionFactory sessionFactory  =  (SessionFactory) field.get(SessionManager.class );
            return sessionFactory.openSession(conn);
        } catch (Exception e) {
            System.out.println("--没有�q�接到��L��?openSessionb)--");
            return null ;
        }
    }

2.异地数据同步��p�|后动作�?TBDao->save() �ȝ��状态到数据�?br />

    public void save(Object obj,String action) {
        Session session = null ;
        try {
            session = SessionManager.currentSession(null,null);
            Transaction tr = session.beginTransaction();
            ZJcyyTb zj = new ZJcyyTb();
            zj.setAction(action);
            zj.setInputdate(new Date());
            session.save(zj);
            session.flush();
            session.refresh(zj,LockMode.UPGRADE);
            //oracle Blob数据持久请参�?->序列化和反序列化对象�?数据�?/a>
            zj.setObject( new ObjectConvert().ObjectToBlob(obj) );
            tr.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            if(session!=null&& session.isOpen() )session.close();
        }

    }

3,��p�|后又成功�q�接�?�Q�线�E�实玎ͼ� TBDao->action()

4.hbn 拦截�?->Interceptor

后记�Q?br />�׃��一些原因代码写的有些简陋，但功能实玎ͼ�表达的的意思也�q�可以（自己有点 ‘买瓜了’哈哈！�Q�。我写出来的目的希望大家能共同进步，�q�等大家拍砖�?�Q�）

G_G 2007-12-03 11:29 发表评论

G_G — Thu, 29 Nov 2007 02:13:00 GMT

拦截�?/b>

package hbn.test.supper.Interceptor;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.hibernate.CallbackException;
import org.hibernate.EntityMode;
import org.hibernate.Interceptor;
import org.hibernate.Transaction;
import org.hibernate.type.Type;

public class TestInterceptor implements Interceptor,Serializable{

     private Set inserts = new HashSet();
     private Set updates = new HashSet();

   // Session初化一个持久对�?如果�q�方法中改变了对象属性就�q�回true 否则null
     public boolean onLoad(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {
         return false ;
    }
    // Session flush()中检查到脏数据是调用如：tr.commit() ....
     public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) throws CallbackException {
        updates.add(entity);
         return false ;
    }
    // Session Save() 当修改了对象属性返回true
     public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {

        inserts.add(entity);
         return false ;
    }
     // delete
     public void onDelete(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) throws CallbackException {
    }
   //flush() 之前调用
     public void preFlush(Iterator entities) throws CallbackException {
    }
     // flush() 执行SQL语句之后调用
     public void postFlush(Iterator entities) throws CallbackException {

         try {
             for (Iterator it = updates.iterator();it.hasNext();){
                System.out.println( " update= " + it.next() );
            }
             for (Iterator it = inserts.iterator();it.hasNext();){
                System.out.println( " insert " + it.next() );
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

     public Boolean isTransient(Object entity) {
         // TODO Auto-generated method stub
         return null ;
    }
//军_��Session中那些对象是脏数�?如果null Session使用默认处理脏数�?/span>
     public int [] findDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) {
         return null ;
    }

     // 当Session构造实体类对象前调�?/span>
     public Object instantiate(String entityName, EntityMode entityMode, Serializable id) throws CallbackException {
         return null ;
    }

     public String getEntityName(Object object) throws CallbackException {
         // TODO Auto-generated method stub
         return null ;
    }

     public Object getEntity(String entityName, Serializable id) throws CallbackException {
         // TODO Auto-generated method stub
         return null ;
    }

     public void afterTransactionBegin(Transaction tx) {
         // TODO Auto-generated method stub

    }

     public void beforeTransactionCompletion(Transaction tx) {
         // TODO Auto-generated method stub

    }

     public void afterTransactionCompletion(Transaction tx) {
         // TODO Auto-generated method stub

    }

}

��试

package hbn.test.supper.Interceptor;

import java.lang.reflect.Field;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import hbn.HibernateSessionFactory;
import hbn.bean.T2oo;
import junit.framework.TestCase;

public class TestIC extends TestCase {
     private SessionFactory sessionFactory;
     protected void setUp() throws Exception {
         super .setUp();
         // 利用java反射得到 HibernateSessionFactory ->
         // private  static org.hibernate.SessionFactory sessionFactory;
         // 要模拟 �ƈ发要 HibernateSessionFactory 得出的有 threadLocal 不行
        HibernateSessionFactory.currentSession();
        HibernateSessionFactory.closeSession();
        Field field = HibernateSessionFactory. class .getDeclaredField( " sessionFactory " );
        field.setAccessible( true );
        sessionFactory = (SessionFactory) field.get(HibernateSessionFactory. class );
    }

     public void testInc() throws Exception {
        TestInterceptor intx = new TestInterceptor();
         // 加蝲拦截�?/span>
        Session session = sessionFactory.openSession(intx);

        Transaction tr = session.beginTransaction();
        T2oo t2 = new T2oo( 23 );
        session.save(t2);
        t2.setAvg( new Integer( 99 ));
        tr.commit();
    }
}

�l�果
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set version=?, avg=?, aid=? where id=? and version=?
//拦截到的
update=hbn.bean.T2oo@277
inserthbn.bean.T2oo@277

G_G 2007-11-29 10:13 发表评论

hibernate 问题_3(�?

G_G — Mon, 26 Nov 2007 10:57:00 GMT
环境:

     private SessionFactory sessionFactory;

     protected void setUp() throws Exception {
         super .setUp();
         // 利用java反射得到 HibernateSessionFactory ->
         // private  static org.hibernate.SessionFactory sessionFactory;
         // 要模拟 �ƈ发要 HibernateSessionFactory 得出的有 threadLocal 不行
         // 要�?/span>
        HibernateSessionFactory.currentSession();
        HibernateSessionFactory.closeSession();
        Field field = HibernateSessionFactory. class .getDeclaredField( " sessionFactory " );
        field.setAccessible( true );
        sessionFactory = (SessionFactory) field.get(HibernateSessionFactory. class );
    }

     protected void tearDown() throws Exception {
         super .tearDown();
    }

悲观�?

     /** 悲观锁问题线�E�模拟 �ƈ发�?br />     * Table -> T1oo(id,name)
     *     +----+------+
     *    | id | name |
     *    +----+------+
     *    |  4 | xx1  |
     *    +----+------+
      */
     public void ctestLock() throws Exception {
         // insert test Data ��试数据
        Session seInsert = sessionFactory.openSession();
        Transaction tr = seInsert.beginTransaction();
        T1oo testUse = testUse = new T1oo();
        testUse.setName( " liukaiyi_test " );
        seInsert.save(testUse);
        tr.commit();
        System.out.println( " **************Test Use Bean : insert******************* " );
        seInsert.close();
        Integer testId = testUse.getId();

        //�q�发模拟
        Session session1 = sessionFactory.openSession();
        Session session2 = sessionFactory.openSession();

         final Transaction tr1 = session1.beginTransaction();
        Transaction tr2 = session2.beginTransaction();

        Query qu1 = session1.createQuery( " from T1oo t1oo where t1oo.name='liukaiyi_test' " );
        Query qu2 = session2.createQuery( " from T1oo t1oo where t1oo.name='liukaiyi_test' " );

        //加悲观锁
        qu1.setLockMode( " t1oo " ,LockMode.UPGRADE);
         final Object bean1 = qu1.uniqueResult();
        Object bean2 = qu2.uniqueResult();

        T1oo t1oo2 = (T1oo)bean2;

        t1oo2.setName( " run1 " );

         new Thread(
                 new Runnable(){
                     public void run()  {
                         try {
                            System.out.println( " ********解锁准备********* " );
                            Thread.sleep( 10 * 1000 );
                            T1oo t1oo1 = (T1oo)bean1;
                            t1oo1.setName( " run2 " );
                            tr1.commit();
                            System.out.println( " ********解锁成功t********* " );
                        } catch (InterruptedException e) {e.printStackTrace();}
                    }
                }
        ).start();

        / /�q�里�?�{�待十秒�?tr1解锁 /
        tr2.commit();

        session1.close();
        session2.close();


         // delete Test Date 删除��试数据
        Session seDelete = sessionFactory.openSession();
        Transaction trD = seDelete.beginTransaction();
        Object obj = seDelete.createQuery( " from T1oo t where t.id=:id " ).
                        setInteger( " id " ,testId.intValue()).
                        uniqueResult();
        seDelete.delete(obj);
        trD.commit();
        System.out.println( " **************Test Use Bean : delete************** " );
        seDelete.close();
    }

乐观�?

     /** 乐观锁问�?br />     * Table -> T1oo(id,name)
     * T2oo.hbn.xml  +> optimistic-lock="version"
     * id下面 +>
     *    +---------+---------+------+
     *    | Field   | Type    | Null |
     *    +---------+---------+------+
     *    | id      | int(11) |      |
     *    | avg     | int(11) |      |
     *    | aid     | int(11) | YES  |
     *    | version | int(11) | YES  |
     *    +---------+---------+------+
     *  注意�Q�要在数据库中多加一列�?br />     *  mysql> alter table T2OO add version int;
      */
     public void testOpLock() throws Exception{
        //��d��试数据
        Session session = sessionFactory.openSession();
        Transaction trI = session.beginTransaction();
        Connection conn = session.connection();
        T2oo t2oo = new T2oo();
        T1oo t1oo = new T1oo( " t1ooOpLock " );
        t1oo.setT2ooSet( new HashSet());
        t2oo.setAvg( new Integer( 23 ));
        t2oo.setT1oo(t1oo);
        t1oo.getT2ooSet().add(t2oo);
        session.save(t2oo);
        trI.commit();
        session.clear();
        session.close();

        //�q�发模拟
        Session se1 = sessionFactory.openSession();
        Session se2 = sessionFactory.openSession();

        Transaction tr1 = se1.beginTransaction();
        Transaction tr2 = se2.beginTransaction();

        T1oo obj1 = (T1oo)se1.load(T1oo. class , new Integer( 1 ));
        T1oo obj2 = (T1oo)se2.load(T1oo. class , new Integer( 1 ));

        ((T2oo)obj1.getT2ooSet().iterator().next()).setAvg( new Integer( 9 ));
        ((T2oo)obj2.getT2ooSet().iterator().next()).setAvg( new Integer( 10 ));

        tr1.commit();

         try {
            tr2.commit();
        } catch (Exception e) {
            se2.clear();
            tr2.commit();
             // tr2报错
        } finally {
            se1.close();
            se2.close();
        }


        //��试数据删除
        Session dele = sessionFactory.openSession();
        Transaction tr = dele.beginTransaction();
        dele.delete(obj1);
        tr.commit();
        dele.close();

        HibernateSessionFactory.closeSession();
    }

G_G 2007-11-26 18:57 发表评论

hibernate 问题��结2 (inverse和cascade)

G_G — Fri, 16 Nov 2007 11:20:00 GMT
inverse 使用

说明�U�定-如：
1.表属�?:T1oo->id,name
          T2oo->id,avg,aid( 外键 ),version

2.代码�q�程是：Save->t1oo对象(T1oo 外键 T2oo)
        T1oo t1oo = new T1oo();
        t1oo.setName("xx");
        t1oo.setT2ooSet(new HashSet());
        T2oo t2oo2 = new T2oo(24);
        //t2oo2.setT1oo(t1oo); (在下面的本用例表中的�W?属�?)
        t1oo.getT2ooSet().add(t2oo2); (在下面的本用例表中的�W?属�?)
        session.save(t1oo);

3.本例表��用：
T1oo.hbm.xml ->
        (在下面的本用例表中的�W?�Q?属�?)



T2oo.hbm.xml ->
        (在下面的本用例表中的�W?�Q?属�?)
�l�合上面说明得表为：
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all   |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+

4.执行 Hibernate语句 �Q?/b>
    Hibernate: insert into t1oo (name, id) values (?, ?)
    Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
5.�l�果为：
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 2 | 24 | NULL |       0 | //主要��是�?aid属�?/b>
+----+-----+------+---------+
1 row in set (0.00 sec)

mysql> select * from t1oo; // 因�ؓ T1oo��L��可以 Save 下面��׃��再提�?/font>
+----+------+
| id | name |
+----+------+
| 2 | xx   |
+----+------+
1 row in set (0.00 sec)

可改��：
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | 可改4 | 可改2 |          |          |
+-------+-------+-------+           |   可改1 |
| t2oo |       | 可改3 |           |          |
+-------+-------+-------+----------+----------+

��L��:
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all   |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all   |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 | NULL|       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |       |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |       |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)

�?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all   |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       |       |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |       |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       |       |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all   |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       |       |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 | NULL |       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�? �? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |       |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       |       |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)

�?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all   |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.02 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all   |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       | all   |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       | all   |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)

�? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all   |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       |       |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.00 sec)

�? �? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |       |          |          |
+-------+-------+-------+ true    | true    |
| t2oo |       |       |    |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)

�? �? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |       |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       | all   |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)

�? �? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       |       |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |    1 |       0 |
+----+-----+------+---------+
1 row in set (0.02 sec)

�? �? �? �?
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |       |          |          |
+-------+-------+-------+ true    | false   |
| t2oo |       |       |          |          |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)

G_G 2007-11-16 19:20 发表评论

hibernate 部分问题�ȝ��—�?

G_G — Mon, 12 Nov 2007 08:29:00 GMT
�~�存问题�Q?br />
     /** 使用 Query.executeUpdate() �~�存中数据不同步解决办法
     *  Table -> T1oo(id,name)
     * Table -> T2oo(id,avg,aid)
     * 外键 T1oo.id->T2oo.aid
     *  Session.createQuery("delete T1oo") ->  Query.executeUpdate()
     */
     public void testExecuteUpdate(){
        System.out.println( " \r\n\r\n********************ExecuteUpdate************************ " );
        T1oo t1oo = new T1oo();
        t1oo.setName( " liukaiyi " );

        HibernateSessionFactory.closeSession();

        Session session = HibernateSessionFactory.currentSession();
    Transaction tr1 = session.beginTransaction();
         // t1 成�ؓ 持久状态一�U�缓存中加蝲
        session.saveOrUpdate(t1oo);
         // 直接一条语句删除T1oo�Q�缓存无法同�?br />         // 一�U�缓存中�q�有 t1
        Query qu = session.createQuery( " delete T1oo " );
         try {
            qu.executeUpdate();
        } catch (Exception e) {
            System.out.println( " //err: 有��联单使用 delete T1oo �q�要delete T2oo.aid = T1oo.id// " );
            List list = session.createQuery( " from T1oo " ).list();
             for (Iterator it = list.iterator();it.hasNext();){
                Query t2qu = session.createQuery( " delete T2oo  where aid=:id " );
                t2qu.setInteger( " id " , ((T1oo)it.next()).getId().intValue());
                t2qu.executeUpdate();
            }
            qu.executeUpdate();
        }

        tr1.commit();

    Transaction tr2 = session.beginTransaction();
         // �q�直接通过一�U�缓存中加蝲t2�Q�但DB中以没有此条数据
        t1oo = (T1oo)session.load(T1oo. class ,t1oo.getId());
        t1oo.setName( " google " );
         try {
            tr2.commit();
        } catch (Exception e) {
            System.out.println( " //err: update(t1oo)->DB 中数据库中没有 t1oo // " );
        }


        System.out.println( " 一�U�缓存清�I�前 " + session.get(T1oo. class ,t1oo.getId()) );
        session.evict(t1oo);
        System.out.println( " 一�U�缓存清�I�后 " + session.get(T1oo. class ,t1oo.getId()) );

         // 不把t1oo id 为空�Q�否则当在saveOrUpdate时候就会以为是游离态 update�?/span>
        t1oo.setId( null );
         // id=null insert 调用
        session.saveOrUpdate(t1oo);
        tr2.commit();

    Transaction tr3 = session.beginTransaction();
        session.delete(t1oo);
        tr3.commit();

        session.close();
        HibernateSessionFactory.closeSession();

    }

�l�果是：
********************ExecuteUpdate************************
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: delete from t1oo
//err: 有��?单��?delete T1oo �q�要delete T2oo.aid = T1oo.id//
Hibernate: select t1oo0_.id as id, t1oo0_.name as name0_ from t1oo t1oo0_
Hibernate: delete from t2oo where aid=?
Hibernate: delete from t2oo where aid=?
Hibernate: delete from t2oo where aid=?
Hibernate: delete from t1oo
Hibernate: update t1oo set name=? where id=?
//err: update(t1oo)->DB 中数据库中没�?t1oo //
一�U�缓存清�I�前 hbn.bean.T1oo@287
Hibernate: select t1oo0_.id as id0_, t1oo0_.name as name0_0_ from t1oo t1oo0_ where t1oo0_.id=?
一�U�缓存清�I�后 null
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: delete from t1oo where id=?

Get Load 区别 �Q?br />
    /** Get Load 区别 (在commit前要 session.flush())
     * Table -> T1oo(id,name)
     * 1.如果未能发现�W�合条�g的记录，get�Ҏ��q�回null�Q�而load�Ҏ��会抛出异�?br />     * 2.Load�Ҏ��可返回实体的代理�c�d��例，而get�Ҏ��永远直接�q�回实体�c�R�?br />     * 3.load�Ҏ��可以充分利用内部�~�存和二�U�缓存中的现有数据，而get�Ҏ��则仅仅在内部�~�存中进行数据查找，
     *             如没有发现对应数据，��越�q�二�U�缓存，直接调用SQL完成数据��d��。�?br />     */
    public void testGetLoad() throws Exception {
        System.out.println("\r\n\r\n********************Get<>Load************************");
        Session session = HibernateSessionFactory.currentSession();
    //  数据准备
        T1oo t1oo = new T1oo();
        t1oo.setName("liu");
    Transaction t1 = session.beginTransaction();
        session.saveOrUpdate(t1oo);
        // ��Z��么这会错�Q?br />        //session.evict(t1oo);
        //session.flush();
        t1.commit();
        session.evict(t1oo);

    Transaction t2 = session.beginTransaction();
        System.out.println("一�U�缓存是否有t1oo(load)->"+session.contains(t1oo));
        //�q�时候t1oo为 CGlib生成的代理类
        t1oo = (T1oo)session.load(T1oo.class,t1oo.getId());
        System.out.println(" 延迟加蝲出现�Q�select.. t1oo0_.id=? 表的其他属性加��q?/span>");
        t1oo.setName("load list");
        //后在 update
        t2.commit();
        session.evict(t1oo);

    Transaction t3 = session.beginTransaction();
        System.out.println("一�U�缓存是否有t1oo(get)->"+session.contains(t1oo));
        //�q�时候t1oo为 CGlib生成的代理类
        t1oo = (T1oo)session.get(T1oo.class,t1oo.getId());
        System.out.println(" 没有延迟加蝲出现");
        t1oo.setName("get list");
        //后在 update
        t3.commit();
        session.evict(t1oo);

    Transaction tr3 = session.beginTransaction();
        session.delete(t1oo);
        tr3.commit();

        session.close();
        HibernateSessionFactory.closeSession();

    }
�l�果
********************Get<>Load************************
Hibernate: insert into t1oo (name, id) values (?, ?)
一�U�缓存是否有t1oo(load)->false
延迟加蝲出现�Q�select.. t1oo0_.id=? 表的其他属性加�?
Hibernate: select t1oo0_.id as id0_, t1oo0_.name as name0_0_ from t1oo t1oo0_ where t1oo0_.id=?
Hibernate: update t1oo set name=? where id=?
一�U�缓存是否有t1oo(get)->false
Hibernate: select t1oo0_.id as id0_, t1oo0_.name as name0_0_ from t1oo t1oo0_ where t1oo0_.id=?
没有延迟加蝲出现
Hibernate: update t1oo set name=? where id=?
Hibernate: select t2ooset0_.aid as aid1_, t2ooset0_.id as id1_, t2ooset0_.id as id0_, t2ooset0_.avg as avg1_0_, t2ooset0_.aid as aid1_0_ from t2oo t2ooset0_ where t2ooset0_.aid=?
Hibernate: delete from t1oo where id=?

Set 集合的识�?/font>�Q?br />
    /** Set 集合的识�?br />     * Table -> T1oo(id,name)
     * Table -> T2oo(id,avg,aid)
     * 外键 T1oo.id->T2oo.aid
     * T1oo
     * T2oo
     * cascade='insert' 是一定要�?br />     *     当 T1oo没有 inverse="true" ��d��权的时候，要双��关�?br />     *     t1oo.getT2ooSet().add(t2oo1);
     *    t1oo.getT2ooSet().add(t2oo2);
     *    t2oo1.setT1oo(t1oo);
     *    t2oo2.setT1oo(t1oo);
     *  要不后sql为：
     *  Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
     *    Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
     *    +----+-----+------+
     *    | id | avg | aid  |
     *    +----+-----+------+
     *    |  1 |  24 | NULL |
     *    |  2 |  23 | NULL |
     *    +----+-----+------+
     *    当 T1oo有 inverse="false"��d��权的时�?br />     *  t1oo.getT2ooSet().add(t2oo1);
     *    t1oo.getT2ooSet().add(t2oo2);
     *  Sql语句为：
     *  Hibernate: insert into t1oo (name, id) values (?, ?)
     *    Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
     *    Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
     *    Hibernate: update t2oo set aid=? where id=?
     *    Hibernate: update t2oo set aid=? where id=?
     *    |  3 |  24 |   12 |
     *    |  4 |  23 |   12 |
     *    +----+-----+------+
    */
    public void testSet(){
        System.out.println("\r\n\r\n********************Set************************");
        T1oo t1oo = new T1oo();
        t1oo.setName("list");

        T2oo t2oo1 = new T2oo(); t2oo1.setAvg(new Integer(23));
        T2oo t2oo2 = new T2oo(); t2oo2.setAvg(new Integer(24));


        Session session = HibernateSessionFactory.currentSession();
        Transaction tr1 = session.beginTransaction();
        session.save(t1oo);
        t1oo = (T1oo) session.load(T1oo.class,t1oo.getId());

        t1oo.setT2ooSet(new HashSet()) ;
        t1oo.getT2ooSet().add(t2oo1);
        t1oo.getT2ooSet().add(t2oo2);

        System.out.println( t1oo.getT2ooSet().size()+"" );
        tr1.commit();

        System.out.println();
        T2oo t2oo3 = new T2oo(); t2oo3.setAvg(new Integer(25));
        T1oo t1oo2 = new T1oo(); t1oo2.setName("mz");
        t2oo3.setT1oo(t1oo2);

        Transaction tr2 = session.beginTransaction();
        session.save(t2oo3);
        try {
            tr2.commit();
        } catch (Exception e) {
            System.out.println("//err: 没有��d��权 cascade = 'all' 不可以��联save t1oo   //");
        }
        session.close();
        HibernateSessionFactory.closeSession();
    }


�l�果是：
********************Set************************
2
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
Hibernate: insert into t2oo (avg, aid, id) values (?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
Hibernate: update t2oo set aid=? where id=?

//err: 没有��d��?cascade = 'all' 不可以��联save t1oo   //

G_G 2007-11-12 16:29 发表评论

源码分析

G_G — Tue, 23 Oct 2007 02:34:00 GMT
1.CollectionHelper 对List,Set,Map 包装��Z��可修改的
public final class CollectionHelper {
    public static final List EMPTY_LIST = Collections.unmodifiableList( new ArrayList(0) );
    public static final Collection EMPTY_COLLECTION = Collections.unmodifiableCollection( new ArrayList(0) );
    public static final Map EMPTY_MAP = Collections.unmodifiableMap( new HashMap(0) );
    private CollectionHelper() {}
}
    1.1 在Collections.unmodifiableList(...)是静态内部类个构造方�?
       悟：从上面看出是一个非常好的�?适配�?
   //1.Collections �?new 出内部类
    public static Collection unmodifiableCollection(Collection c) {
        return new UnmodifiableCollection(c);
    }

    //2.内部�c?/font>也��? Collection
    static class UnmodifiableCollection implements Collection, Serializable {
    private static final long serialVersionUID = 1820017752578914078L;

    final Collection extends E> c;
    //3.很好适配 Collection 通过他把 add remove �{�功�?��装
    UnmodifiableCollection(Collection extends E> c) {
            if (c==null)
                throw new NullPointerException();
            this.c = c;
        }
    ...............

2.大量使用内部�c�L��??如：
Mappings.PropertyReference upr = (Mappings.PropertyReference) iter.next();
////////////////////////////////////////////////
Mappings�?br />    static final class PropertyReference implements Serializable {
        String referencedClass;
        String propertyName;
        boolean unique;
    }

//感觉是可以更好的代码�~�写

G_G 2007-10-23 10:34 发表评论

G_G — Fri, 24 Aug 2007 08:36:00 GMT
    1。文件的映射。由于��?MyEclipse�Q�傻瓜版^_^�Q?所�?hibernate工具�Q�extensions�Q�Middlegen�Q�tools�{�）一直没好好研究�q�就不献丑了�?br />    2。Criteria
       1�Q�查询条仉��过 Criteria.add ��d�� Expression 用于描述条�g
                Expression.( and or like in le lt ..... )
                参见�Q?Criteria查询
       2�Q�criteria.setFirstResult(100);
        criteria.setMaxResults(20); //��索范�?br />        criteria.addOrder(Order.asc("name")); //排序
        .add( Expression.sql("lower($alias.name) like lower(?)", "Fritz%", Hibernate.STRING)   //直接嵌入SQL
       3�Q?/font>Cat cat = new Cat();
          ....

         List results = session.createCriteria(Cat.class).add( Example.create(cat) ).list(); //�Ҏ��对象查询

    3。HQL 完全面向对象的，具备�l�承、多态和兌��{�特性�?br />       1�Q�参见： HQL
       2�Q�内�q�接�Q�inner join          左外�q�接�Q�left outer join          叛_��q�接�Q�right outer join
        http://www.hibernate.org/hib_docs/reference/en/html/queryhql.html
          代表性的语句
Hql.hbm.xml
        <set name="fkSet" inverse="true">
            <key column="id"/>
            <one-to-many class="Fk"/>
        set>
SQL
alter table fk add constraint  FK_hf foreign key(id) references hql(id)

mysql> select * from hql;
+----+----------+
| id | name     |
+----+----------+
| 0 | liukaiyi |
| 1 | heha     |
+----+----------+
2 rows in set (0.00 sec)

mysql> select * from fk;
+----+------+
| id | name |
+----+------+
| 0 | yy   |
| 1 | xx   |
+----+------+
2 rows in set (0.00 sec)

//��单的 �l�果�Q?2 liukaiyi:heha
        Query qu = se.createQuery("select h.name " +
                                        " from Hql h , Fk f" +
                                        " where h.id = f.id" );
        List list =  qu.list() ;
        tr.commit();
        System.out.println( list.size() );
        System.out.println( list.get(0)+":"+list.get(1) );

//�l�出对象 �l�果 : heha
Query qu = se.createQuery("from Hql h where h.fkSet.name='xx'");
((Hql)list.get(0)).getName() ;

//�l�出Object �l�果�Q�heha xx
Query qu = se.createQuery("select h.name,f.name from Hql h join h.fkSet f where f.name='xx'");
List list =  qu.list() ;
tr.commit();
System.out.println(list.size());
Object[] objs = (Object[]) list.get(0) ;
System.out.println( objs[0] +":"+objs[1] );

//�l�出 Map heha xx

        Query qu = se.createQuery("select new map( h.name as hn,f.name as fn)from Hql h join h.fkSet f where f.name='xx'");
        List list =  qu.list() ;

        tr.commit();
        System.out.println(list.size());
        Map map = ((Map)list.get(0));
        System.out.println( map.get("hn") );
    }

//报表语句 �l�果: 1
        Query qu = se.createQuery("select count(*) from Hql h join h.fkSet f " +
                                        " where h.name='heha' and h.id=f.id " +
                                        " group by h.name ");
        List list =  qu.list() ;
        tr.commit();
        System.out.println( list.get(0) );

//集合�?�l�果 liukaiyi:heha
//元素�?elements�?tt class="literal">indices 函数) 可以使用 any, some, all, exists, in //EG: from Player p where 3 > all elements(p.scores)
+----+----------+
| id | name     |
+----+----------+
| 0 | liukaiyi |
| 1 | heha     |
| 3 | oo       |
+----+----------+

        Query qu = se.createQuery("select h.name " +
                                        " from Hql h" +
                                        " where h.id in elements(h.fkSet.id) " );
        List list =  qu.list() ;
        tr.commit();
        System.out.println( list.get(0)+":"+list.get(1) );

//使用 javaBean �l�定
Query q = s.createQuery("from foo Foo as foo where foo.name=:name and foo.size=:size");
q.setProperties(fooBean); // fooBean包含�Ҏ��getName()与getSize()
List foos = q.list();

G_G 2007-08-24 16:36 发表评论

hbn �W�记

G_G — Thu, 09 Aug 2007 06:30:00 GMT

1.Criteria �?or

     public List getFind(String[] dpids ) {
        Criteria cr =   getCriteriaBegin(Deptid. class );

        cr.add( Restrictions.or(
                    Restrictions.eq( " dpid " , dpids[ 0 ] ) ,
                    Restrictions.eq( " dpid " ,dpids[ 1 ] ) )
                );

         return getCriteriaEnd(cr);
    }

2. 容器储存 �Q�从表没主键�Q?/font> 1)Set �?.xml
             引用 http://caterpillar.onlyfun.net/GossipCN/HibernateGossip/HibernateGossip.html
//email�?/font> ��?2�?id address
//email表的主键也是主表的主�?/font>
column="address"/>

.java private Set emails; //存和外键�?/font>
2)List �?.xml

//�?/font>item表的 idINT(11) NOT NULL,
//��?position INT(11) NOT NULL,
//��?/font>name VARCHAR(100) NOT NULL default ''

。。。。�?br />3. 列�ؓ对象

//调用 getAddress()

G_G 2007-08-09 14:30 发表评论

hibernate 包装

G_G — Wed, 04 Jul 2007 08:49:00 GMT
07-11-9
�׃��我对hibernate理解的深入，在次我来�l�结下这��文章的不��的地方（好多人在拍砖哈）
对复杂的逻辑�q�样开和关太冒�׃��?br /> 在普通的逻辑�Ҏ��?session都叠加的用上2�ơ以�?�q�就要对一�U�缓冲的��理。事物的使用也是一栗��?br />

下蝲:
http://www.aygfsteel.com/Files/Good-Game/hibernateUtil.rar

��单的�l�承�?:
      �l�承 DBManage �c��?把数据包装类 ��理 ( 填充 , set �{?) 后就直接攑ֈ��?insert , update , delete �Ҏ��?br />         填充可看看这�?很有实用价�?----> ( �?Form -> Bean 或 Bean ->Bean ) 例子很简单但��x��表明

      �l�承 DBSelect �c?�?select �q�只�?�?Query �l�出 ��单用�?�?br />                                                      Query qu =   dao.getQueryBegin( " HQL " );
                                                              qu.add .....
                                                      List li = dao.getQuertyEnd( qu );
     扩展: Criteria cr , SQLQuery , �{�等把她包装�?各个 dao �?不是 �?��h��     : )

Eg :    extendsDBBasic �c?/font>
    public List select(String id,String time){

        List list = new ArrayList();

        Query qu = getQueryBegin("HSQL");   //�l�承带来的好�?br />
        .add..........

       List list = getQuertyEnd(qu);    //�l�承�l�束

        return  list;
    }

�~�点: 最好不要static 在一旉��点上此类不能支持多线�E��?br />               basicBegin basicEnd �Ҏ�� ( 我找不到好的�Ҏ�� 要的话来�?�q�接池什么的大家讨论西西�?!  )
               sess 为全局�?session 要是写成 baseicBegin �q�回的话感觉下面的还有很多要�?什�?close �?..
                     sess 也是�~�点的所在�?当然大家有什么想�?改下或自己来�?��包�?我只是�?  抛砖引玉

    private Map transmap = new HashMap();

    protected Session basicBegin(){
        Session sess = SessionManager.currentSession();
        try {
            transmap.put( sess, sess.beginTransaction() );
        }catch(Exception e){System.out.println(e);}
        return sess ;
    }

    protected void basicEnd(Session sess){
        try {
            ((Transaction)transmap.remove(sess)).commit();
        }catch(Exception e){System.out.println(e);}
        finally{
            sess = null ;
            SessionManager.closeSession();
        }
    }

心得: 多包装多快乐

G_G 2007-07-04 16:49 发表评论

日韩综合一区二区,香蕉久久a毛片,羞羞答答一区二区

数据库表地址数据�Q�中国地区）

spring �?hibernate 整合(事务)

Hibernate �U�联��d��删除

mysql Blob hbn 操作

hbn �l�承关系映射_1

hibernate + Myeclipes 敏捷(���例)

hibernate 查询语句�ȝ��

hibernate cache2

hibernate 多服务器数据同步问题�Q�支持�g�q�同步）

hibernate 问题_3(�?

hibernate 问题���结2 (inverse和cascade)

hibernate 部分问题�ȝ��—�?

源码分析

hbn �W�记

hibernate 包装

hibernate + Myeclipes 敏捷(��例)

hibernate 问题��结2 (inverse和cascade)