| 发表于：2008-01-07 11:09:41 楼主 |
各位大侠，这几天按照网上的介绍，在eclpse环境里面，作了个简单的hibernate例子，运行，但是报错：java.lang.exceptionininitializererror，具体的代码以及配置文件如下：
hibernate.cfg.xml配置内容：
<?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="connection.username"> cbs </property>
<property name="connection.url">
jdbc:oracle:thin:@localhost:1521:cbstj
</property>
<property name="dialect">
net.sf.hibernate.dialect.oracledialect
</property>
<property name="jdbc.fetch_size"> 50 </property>
<property name="jdbc.batch_size"> 25 </property>
<property name="show_sql"> true </property>
<property name="use_outer_join"> false </property>
<property name="connection.password"> admin </property>
<property name="connection.driver_class">
oracle.jdbc.driver.oracledriver
</property>
<mapping resource="tregister.hbm.xml"/>
</session-factory>
</hibernate-configuration>
tregister.hbm.xml的内容：
<?xml version="1.0" encoding="utf-8"?>
<!doctype hibernate-mapping public "-//hibernate/hibernate mapping dtd 3.0//en"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
mapping file autogenerated by myeclipse - hibernate tools
-->
<hibernate-mapping>
<class name="hibernate.po.tregister" table="t_register">
<id name="id" type="java.lang.integer">
<column name="id" />
<generator class="increment" />
</id>
<property name="username" type="java.lang.string">
<column name="username" length="30" />
</property>
<property name="userpwd" type="java.lang.string">
<column name="userpwd" length="30" />
</property>
<property name="sex" type="java.lang.string">
<column name="sex" length="10" />
</property>
<property name="age" type="java.lang.integer">
<column name="age" />
</property>
</class>
</hibernate-mapping>
配置文件都放在classes下面。
hibernateutil.java获取唯一session实例：
package hibernate;
import org.hibernate.hibernateexception;
import org.hibernate.session;
import org.hibernate.sessionfactory;
import org.hibernate.cfg.configuration;
public class hibernateutil{
private static final sessionfactory sessionfactory;
static
{
try
{
configuration config = new configuration（).configure（"/hibernate.cfg.xml");
sessionfactory = config.buildsessionfactory（);
}
catch（throwable e)
{ system.out.println（"exceptionininitializererror----------" );
throw new exceptionininitializererror（e);
}
}
public static final threadlocal session = new threadlocal（);
public static session currentsession（) throws hibernateexception
{
session s = （session)session.get（);
//open a new session,if this thread has none yet
if（s == null ¦ ¦ !s.isopen（))
{
s = sessionfactory.opensession（);
session.set（s);
}
return s;
}
public static void closesession（) throws hibernateexception
{
session s = （session)session.get（);
session.set（null);
if（s != null)
s.close（);
}
}
当运行到：sessionfactory = config.buildsessionfactory（)时，就报上面那个错java.lang.exceptionininitializererror。
我在工程的lib下面，我把hibernate-3.2.5.ga.tar.gz里面的jar都已经放进去（包括hibernate3.jar），构建路径当然也已经指向\web-inf\lib了，但是还是报错，是什么原因呢？
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