前辈们好!
我刚刚学习使用hibernate,关于配置文件的路径问题有些不明白!
我在执行HibernateTest.java文件中这条语句时出现错误:
Configuration config = new Configuration().configure();
错误信息如下:
2009-01-28 13:39:14,015 INFO org.hibernate.cfg.Environment[main] - Hibernate 3.2.6
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:174)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:193)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:197)
at mapping.HibernateTest.main(HibernateTest.java:10)
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:529)
... 4 more我怀疑是没有读取到配置文件.我的配置文件路径如下:
我在eclipse中建里一个ejb project,ejbModule下有一个sessionbean packge里面放了几个sessionbean.
然后再ejbModule下还有一个mapping packge和sessionbean packge是平级的.
在mapping packge里面有:
HibernateTest.java
user.java(对应数据库表的pojo文件)
user.hbm.xml(映射文件)
在ejbModule下面还有一个hibernate的配置文件:hibernate.cfg.xml 和前面2个packge是平级的.我运行HibernateTest.java文件进行测试的时候就报上面的错误!请您指点一二,感激不尽!
hibernate.cfg.xml文件内容如下: <?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 name="hibernate" > <!-- local connection properties -->
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/wukuang_stock</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">12345</property>
<!-- property name="hibernate.connection.pool_size"></property --> <!-- dialect for MySQL -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.show_sql">true</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
<mapping resource="mapping/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>user.hbm.xml文件内容如下:<?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="mapping">
<class
name="user"
table="user"
>
<meta attribute="sync-DAO">false</meta>
<id
name="Id"
type="integer"
column="id"
>
<generator class="sequence"/>
</id> <property
name="Name"
column="name"
type="string"
not-null="true"
length="45"
/>
<property
name="Sex"
column="sex"
type="integer"
not-null="true"
length="10"
/>
<property
name="IdCard"
column="id_card"
type="integer"
not-null="true"
length="10"
/>
<property
name="Tel"
column="tel"
type="string"
not-null="true"
length="45"
/>
<property
name="Mobile"
column="mobile"
type="integer"
not-null="true"
length="10"
/>
<property
name="Fax"
column="fax"
type="string"
not-null="true"
length="45"
/>
<property
name="Address"
column="address"
type="string"
not-null="true"
length="45"
/>
<property
name="GruopType"
column="gruop_type"
type="integer"
not-null="true"
length="10"
/>
</class>
</hibernate-mapping>
我刚刚学习使用hibernate,关于配置文件的路径问题有些不明白!
我在执行HibernateTest.java文件中这条语句时出现错误:
Configuration config = new Configuration().configure();
错误信息如下:
2009-01-28 13:39:14,015 INFO org.hibernate.cfg.Environment[main] - Hibernate 3.2.6
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:174)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:193)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:197)
at mapping.HibernateTest.main(HibernateTest.java:10)
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:144)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:529)
... 4 more我怀疑是没有读取到配置文件.我的配置文件路径如下:
我在eclipse中建里一个ejb project,ejbModule下有一个sessionbean packge里面放了几个sessionbean.
然后再ejbModule下还有一个mapping packge和sessionbean packge是平级的.
在mapping packge里面有:
HibernateTest.java
user.java(对应数据库表的pojo文件)
user.hbm.xml(映射文件)
在ejbModule下面还有一个hibernate的配置文件:hibernate.cfg.xml 和前面2个packge是平级的.我运行HibernateTest.java文件进行测试的时候就报上面的错误!请您指点一二,感激不尽!
hibernate.cfg.xml文件内容如下: <?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 name="hibernate" > <!-- local connection properties -->
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/wukuang_stock</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">12345</property>
<!-- property name="hibernate.connection.pool_size"></property --> <!-- dialect for MySQL -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.show_sql">true</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
<mapping resource="mapping/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>user.hbm.xml文件内容如下:<?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="mapping">
<class
name="user"
table="user"
>
<meta attribute="sync-DAO">false</meta>
<id
name="Id"
type="integer"
column="id"
>
<generator class="sequence"/>
</id> <property
name="Name"
column="name"
type="string"
not-null="true"
length="45"
/>
<property
name="Sex"
column="sex"
type="integer"
not-null="true"
length="10"
/>
<property
name="IdCard"
column="id_card"
type="integer"
not-null="true"
length="10"
/>
<property
name="Tel"
column="tel"
type="string"
not-null="true"
length="45"
/>
<property
name="Mobile"
column="mobile"
type="integer"
not-null="true"
length="10"
/>
<property
name="Fax"
column="fax"
type="string"
not-null="true"
length="45"
/>
<property
name="Address"
column="address"
type="string"
not-null="true"
length="45"
/>
<property
name="GruopType"
column="gruop_type"
type="integer"
not-null="true"
length="10"
/>
</class>
</hibernate-mapping>
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否则在configure时得指定路径
好像是你这个主程序初始化的时候出的错。