Hibernate3 参考手册 例子学习

 首先需要的包：
      antlr-2.7.6.jar
      asm.jar
      asm-attrs.jar
      cglib-2.1.3.jar
      commons-collentions-2.1.1.jar
      commons-logging-1.0.4.jar
      dom4j-1.6.1.jar
      ehcache-1.2.3.jar
      jta.jar
      log4j-1.2.11.jar
     
      hibernate.jar

      hsqldb.jar
      mysql-connector-java-5.0.3-bin.jar
 

1。////////////////////////////////////////要持久化处理的类Event

package events;

import java.util.*;

public class Event {
    private Long id;
    private String title;
    private Date date;

  
    public Long getId() {
        return id;
    }

  //注意是private，原因是我们一般不去处理这个id的  
  private void setId(Long id) {
        this.id = id;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
       
}

2。/////////////////////////////////////////////////////Event类的数据库匹配文件Event.hbm.xml

<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

    <class name="events.Event" table="event">
        <id name="id" column="id">
            <generator class="native"/>
        </id>
        <property name="date" type="timestamp" column="date"/>
        <property name="title"/>
    </class>

</hibernate-mapping>

//注意这个配置文件和Event类最好放在同一个目录下，即配置文件也在这个events包下面

3。log4j.properties文件

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=warn, stdout

log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

4。.////////////////////////////////////////////////Hibernate.hbm.xml数据库配置文件
注意它和包在同一层次上

a。针对mysql的(这个是我家的，原文是hsqldb数据库)
      <?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/yay</property>
        <property name="connection.username">root</property>
        <property name="connection.password">qwe123</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <!--property name="hbm2ddl.auto">create</property-->

        <mapping resource="events/Event.hbm.xml"/>
     
    </session-factory>

  </hibernate-configuration>
   用mysql时候需要在yay数据库目录下建立表event，sql语句如下：
   create table event
  (
  id bigint(5) auto_increment primary key,
  date timestamp not null,
  title varchar(50)
  );

b。这个是以用hsqldb时候的配置文件
   <?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
        <property name="connection.url">jdbc:hsqldb:hsql://localhost</property>
        <property name="connection.username">sa</property>
        <property name="connection.password"></property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <!--property name="hbm2ddl.auto">create</property-->

        <mapping resource="events/Event.hbm.xml"/>
      

    </session-factory>

   </hibernate-configuration>
   这里需要提醒的是：你只需要启动数据库系统，不需要你自己去建立表格或者库。
   启动数据库时候需要建立一个目录，比如data，然后在这个目录下键入这个dos命令：
D:/hibernate3/data>java -classpath ../lib/hsqldb.jar org.hsqldb.Server
    这个时候如果你到data目录下去看，会看到自动生成3个文件，可见数据是保存在调用启动数据库命令的目录里面的。

 

5。/////////////////////////////////////////////////////获取SessionFactory对象的辅助类：
package util;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil{

    private static final SessionFactory sessionFactory;

    static {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            sessionFactory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

}

6。////////////////////////////////////////////用来做测试，包含main方法的类
package events;
import org.hibernate.*;
import org.hibernate.criterion.Expression;

import java.util.*;

import util.HibernateUtil;

public class EventManager {

    public static void main(String[] args) {
        EventManager mgr = new EventManager();

        if (args[0].equals("store")) {
            mgr.createAndStoreEvent("My Event", new Date());
        }
        else if (args[0].equals("list")) {
            List events = mgr.listEvents();
   System.out.println("**************************");
            for (int i = 0; i < events.size(); i++) {
                Event theEvent = (Event) events.get(i);
                System.out.println("Event: " + theEvent.getTitle() +
                                   " Time: " + theEvent.getDate());
            }
   System.out.println("**************************");
        }
      
        HibernateUtil.getSessionFactory().close();
    }

    private Long createAndStoreEvent(String title, Date theDate) {

        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();

        Event theEvent = new Event();
        theEvent.setTitle(title);
        theEvent.setDate(theDate);

        session.save(theEvent);

        session.getTransaction().commit();

        return theEvent.getId();
    }

   

    private List listEvents() {

        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();

        List result = session.createQuery("from events.Event").list();
  //List result = session.createQuery("from Event").list();也是可以的

        session.getTransaction().commit();

        return result;
    }

}

 

7。////////////////////////////////////////少不了ant工具的配合

<project name="hibernate-tutorial" default="compile">

    <property name="sourcedir" value="${basedir}/src"/>
    <property name="targetdir" value="${basedir}/bin"/>
    <property name="librarydir" value="${basedir}/lib"/>

    <path id="libraries">
        <fileset dir="${librarydir}">
            <include name="*.jar"/>
        </fileset>
    </path>

    <target name="clean">
        <delete dir="${targetdir}"/>
        <mkdir dir="${targetdir}"/>
    </target>

    <target name="compile" depends="clean, copy-resources">
      <javac srcdir="${sourcedir}"
             destdir="${targetdir}"
             classpathref="libraries"/>
    </target>

    <target name="copy-resources">
        <copy todir="${targetdir}">
            <fileset dir="${sourcedir}">
                <exclude name="**/*.java"/>
            </fileset>
        </copy>
    </target>

    <target name="run" depends="compile">
        <java fork="true" classname="events.EventManager" classpathref="libraries">
            <classpath path="${targetdir}"/>
            <arg value="${action}"/>
        </java>
    </target>
   
    <target name="war" depends="compile">
        <war destfile="hibernate-tutorial.war" webxml="web.xml">
            <lib dir="${librarydir}">
              <exclude name="jsdk*.jar"/>
            </lib>

            <classes dir="${targetdir}"/>
        </war>
    </target>

</project>

注意这里的${basedir}指的就是build.xml文件所在的目录。

8。//////////////////////////////////运行：
   注意，可以从命令行里面传递参数赋到ant中，比如这里的${action}"
   参数一 run -Daction=store
  参数二   run -Daction=list

给大家看看我的目录结构吧：》
hibernate目录
                        data目录  在这个目录下，调用命令启动hsqldb的
                        lib目录      在这个目录下，把需要的包全部放进来
                        SQL目录 在这个目录下，我生成mysql需要的sql语句
                                       enentTable.sql                           文件
                        src目录
                                      events包
                                                    Event.hbm.xml               文件
                                                    Event.java                       文件
                                                    EventManager.java       文件
                                      util包
                                                    HibernateUtil.java         文件
                                      hibernate.cfg.xml                        文件(注意针对mysql和hsqldb的各不相同)
                                      log4j.properties                           文件
                       build.xml                                                      文件