Hibernate 连接MySQL/SQLServer/Oracle数据库的hibernate.cfg.xml文件

用Hibernate配置连接数据库可以方便我们对POJO的操作，节省了很多时间和代码。下面就分别说明连接不同数据库需要在hibernate.cfg.xml做的配置。

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1、Hibernate连接MySQL数据库的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>
     <!-- 配置JDBC连接属性 -->
     <property name="myeclipse.connection.profile">
         com.mysql.jdbc.Driver
     </property>
     <property name="connection.url">
         jdbc:mysql://localhost:3306/basehibernate
     </property>
     <property name="connection.username">root</property>
     <property name="connection.password">sa</property>
     <property name="connection.driver_class">
         com.mysql.jdbc.Driver
     </property>
     <property name="dialect">
         org.hibernate.dialect.MySQLDialect
     </property>

     <!-- 自动建表 -->
     <property name="hbm2ddl.auto">update</property>
     <!-- 自动提交，不加的话可能会出现insert之后数据库无数据 -->
     <property name="connection.autocommit">true</property>

     <!-- 使用Hibernate Annotation的POJO类 -->
     <mapping class="com.basehibernate.pojo.Department" />
     <mapping class="com.basehibernate.pojo.Employee" />
 </session-factory>
 </hibernate-configuration>

2、Hibernate连接Oracle数据库的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>
     <!-- 配置JDBC连接属性 -->
     <property name="connection.driver_class">
          oracle.jdbc.driver.OracleDriver
     </property>
     <property name="connection.url">
         jdbc:oracle:thin:@localhost:1521:chanshuyi
     </property>
     <property name="myeclipse.connection.profile">oracle</property>
     <property name="connection.username">csy</property>
     <property name="connection.password">csy</property>
     <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

     <!-- oracle特有的提交更改 -->
     <property name="defaultAutoCommit">true</property>
     <!-- 自动建表 -->
     <property name="hbm2ddl.auto">auto</property>
     <property name="show_sql">true</property>
     <!-- 自动提交，不加的话可能会出现insert之后数据库无数据 -->
     <property name="connection.autocommit">true</property>

     <!-- 使用Hibernate Annotation的POJO类 -->
     <mapping class="com.xinpinv.pojo.Product" />
     <mapping class="com.xinpinv.pojo.BitInfo" />
 </session-factory>
 </hibernate-configuration>

3、Hibernate连接Oracle数据库的hibernate.cfg.xml

（MARK 待写）