初学hibernate,Hibernate Synchronizer这个插件感觉有点问题,急死了!老是有错误

Question

我用hibernate synchronizer按照网上的例子做了一个例子,运行了n天还是没有运行起来
这是我的hbm.xml文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="edu.yzu">
<class
name="Wahaha"
table="wahaha"
>
<meta attribute="sync-DAO">true</meta>
     <id name="Id" type="Integer" column="id">
    <generator class="sequence"/>
     </id>

<property
name="Username"
column="username"
type="string"
not-null="false"
length="10"
/>
<property
name="Password"
column="password"
type="string"
not-null="false"
length="10"
/>
</class>
</hibernate-mapping>
下面的是cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration
    PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- local connection properties -->
<property name="hibernate.connection.url">
jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Mydb
</property>
<property name="hibernate.connection.driver_class">
com.microsoft.jdbc.sqlserver.SQLServerDriver
</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">guolei</property>
<!-- property name="hibernate.connection.pool_size"></property -->
<!-- dialect for Microsoft SQL Server -->
<property name="dialect">
org.hibernate.dialect.SQLServerDialect
</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.transaction.factory_class">
org.hibernate.transaction.JDBCTransactionFactory
</property>
<mapping resource="edu/yzu/Wahaha.hbm.xml" />
</session-factory>
</hibernate-configuration>
最后测试时这个地方老是有问题
_RootDAO.initialize(); /就是这个地方
WahahaDAO persondao = new WahahaDAO();
Wahaha a=new Wahaha();
a.setPassword("gd");
a.setUsername("gd");

/*SessionFactory sf = new Configuration().configure().buildSessionFactory();
  Session sess = sf.openSession();
  Transaction tx = sess.beginTransaction();
  
  sess.save( a );
  
  tx.commit();
  sess.close();*/
persondao.save(a);

Environment - Hibernate 3.2.0
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:191)
at edu.yzu.base._BaseRootDAO.getNewConfiguration(_BaseRootDAO.java:192)
at edu.yzu.base._BaseRootDAO.initialize(_BaseRootDAO.java:90)
at edu.yzu.base._BaseRootDAO.initialize(_BaseRootDAO.java:79)
at edu.yzu.dao.WahahaDAO.main(WahahaDAO.java:20)
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:515)
... 7 more

Answer 1

Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:191
现在报这个错了为什么?
人呢,

Answer 2

配置文件没有问题，是你的dao写的有问题吧

Answer 3

dao后来被我改掉了!后来报这个错!
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:168)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:187)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:191
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:515)