Hibernate 框架的搭建

一、在开发环境中导入相关的hibernate包和连接池包和数据驱动包

 mysql-connector-java-5.1.6.jar

antlr-2.7.6.jar

c3p0-0.9.1.jar

commons-collections-3.1.jar

dom4j-1.6.1.jar

ejb3-persistence.jar

hibernate3.jar

hibernate-annotations.jar

hibernate-commons-annotations.jar

javassist-3.9.0.GA.jar

jta-1.1.jar

proxool-0.8.3.jar

slf4j-api-1.5.8.jar

slf4j-nop-1.7.5.jar

二、在根路径下配置基本配置文件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 HibernateTools. -->

<hibernate-configuration>

 

         <session-factory>

                   <!--Oracle配置 -->

                   <propertyname="dialect">

                            org.hibernate.dialect.Oracle9iDialect

                   </property>

                   <propertyname="connection.url">

                            jdbc:oracle:thin:@192.168.7.***:1521:DatabaseName

                   </property>

                   <propertyname="connection.username">OracleName</property>

                   <propertyname="connection.password">OraclePassword</property>

                   <propertyname="connection.driver_class">

                            oracle.jdbc.driver.OracleDriver

                   </property>

                   <!--mysql 数据配置-->

                   <!--<propertyname="dialect">

                            org.hibernate.dialect.MySQLDialect

                   </property>

                   <propertyname="connection.url">

                            jdbc:mysql://127.0.0.1:3306/DatabaseName

                   </property>

                   <propertyname="connection.username">mysqlName</property>

                   <propertyname="connection.password">mysqlPassword</property>

                   <propertyname="connection.driver_class">

                            com.mysql.jdbc.Driver

                   </property>-->

                   <!--在后台打印sql语句 -->

                   <propertyname="show_sql">true</property>

                   <!--hibernate自动建表 -->

                   <propertyname="hibernate.hbm2ddl.auto">update</property>

                   <!--使用c3p0连接池 -->

                    <propertyname="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>

                   <!--初始化时获取10个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3-->

                   <propertyname="c3p0.initialPoolSize">10</property>

                   <!--连接池中JDBC连接的最大数量。Hibernate默认为100 -->

                   <propertyname="hibernate.c3p0.max_size">100</property>

                   <!--连接池中JDBC连接的最小数量。Hibernate默认为1 -->

                   <propertyname="hibernate.c3p0.min_size">5</property>

                   <!--何时从连接池中移除一个空闲的连接（以秒为单位）时。Hibernate默认为0，永不过期 -->

                   <propertyname="hibernate.c3p0.timeout">300</property>

                   <!--被缓存的预编译语句数量。用来提高性能。Hibernate默认为0，缓存不可用-->

                   <propertyname="hibernate.c3p0.max_statements">1000</property>

                   <!--若数据库中连接不足时，一次向数据库服务器申请多少个连接-->

                   <propertyname="hibernate.c3p0.acquire_increment">5</property>

                   <!--hibernate将session 的线程配置 -->

                   <propertyname="current_session_context_class">thread</property>

                   <!--连接关闭时默认将所有未提交的操作回滚。Default: false -->

       <propertyname="autoCommitOnClose">false</property>

                   <!--两种指定映射文件--> 

                   <!--注解方式-->

                   <!--<mappingclass="com.eakom.*"/> -->

                   <!--xxx.hbm.xml配置文件方式 -->

                   <!--<mappingresource="org/mxg/UserInfo.hbm.xml"> -->

         </session-factory>

 

</hibernate-configuration>

 

 

三、在跟项目的新建工具类

 

package com.eakom.utils;
import java.io.Serializable; 

 
import org.hibernate.Session; 

import org.hibernate.SessionFactory; 

import org.hibernate.Transaction; 

import org.hibernate.cfg.AnnotationConfiguration; 

 
public
classHibernateUtils { 
   privatestaticSessionFactory
sessionFactory; 
 
   privateHibernateUtils() { 

   } 
 
   static{ 
        /**
         * configure()参数为空默认查找classes目录下hibernate.cfg.xml

         * configure("文件名")也有重载方法，参数名为配置文件名
         */ 
        sessionFactory =
newAnnotationConfiguration().configure().buildSessionFactory(); 

   } 
 
   publicstaticSessionFactory getSessionFactory() { 

        return
sessionFactory; 
   } 
 
   /**
     * 如果想使用sessionFactory.getCurrentSession()来获得Session时，需要在配置文件中添加一句：
     * <!-- 本地事务防止使用sessionFactory.getCurrentSession()时报错："org.hibernate.HibernateException:
NoCurrentSessionContext configured!"--> 
     * <propertyname="hibernate.current_session_context_class">thread</property>
     * @return
     */ 
   publicstaticSession getCurrentSession() { 

        return
sessionFactory.getCurrentSession(); 
   } 
   publicstaticSession getNewSession() { 

        return
sessionFactory.openSession(); 
   } 
   publicstaticvoidadd(Object entity) { 

        Session s = null; 

        Transaction tx = null; 

        try { 

            s = HibernateUtils.getNewSession(); 
            tx = s.beginTransaction(); 
            s.save(entity); 
            tx.commit(); 
        } finally { 
            if (s !=
null) 
                s.close(); 
        } 
   } 
 
   publicstaticvoidupdate(Object entity) { 

        Session s = null; 

        Transaction tx = null; 

        try { 

            s = HibernateUtils.getNewSession(); 
            tx = s.beginTransaction(); 
            s.update(entity); 
            tx.commit(); 
        } finally { 
            if (s !=
null) 
                s.close(); 
        } 
   } 
 
   publicstaticvoiddelete(Object entity) { 

        Session s = null; 

        Transaction tx = null; 

        try { 

            s = HibernateUtils.getNewSession(); 
            tx = s.beginTransaction(); 
            s.delete(entity); 
            tx.commit(); 
        } finally { 
            if (s !=
null) 
                s.close(); 
        } 
   } 
 
   publicstaticObject get(Class clazz, Serializable id) { 

        Session s = null; 

        try { 

            s = HibernateUtils.getNewSession(); 
            Object obj = s.get(clazz, id); 
            return obj; 

        } finally { 
           if (s !=
null) 
                s.close(); 
        } 
   } 
} 

四、在项目中使用hibernate连接

 

Session session = HibernateUtils.getCurrentSession();
Transaction tx = session.beginTransaction();

String sql=”select * from tablename”;

SQLQuery query=session.createSQLQuery(sql);

Query.list();

tx.commit();

五、创建完毕