hibernate.cfg.xml文件，必不可少的一个xml文件，上面附有数据库的用户名，密码，链接字符串，方言等信息，还包含映射的文件路径：
<?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="dialect">
org.hibernate.dialect.Oracle9Dialect
</property>
<property name="connection.url">
jdbc:oracle:thin:@127.0.0.1:1521:orcl
</property>
<property name="connection.username">pro</property>
<property name="connection.password">pro</property>
<property name="connection.driver_class">
oracle.jdbc.OracleDriver
</property>
<property name="myeclipse.connection.profile">pro</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="current_session_context_class">thread</property>
<mapping resource="org/entity/Dept.hbm.xml" />
<mapping resource="org/entity/Emp.hbm.xml" />
</session-factory>
</hibernate-configuration>
