求助：hibernate运行报错，求大神帮忙

[qiufeng621]

小弟初学hibernate，用的是hibernate4.1.9，运行时报MappingException
错误信息：
org.hibernate.MappingException: Unable to load class [ org.zh.domain] declared in Hibernate configuration <mapping/> entry
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.zh.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:17)
at org.zh.util.HibernateUtil.<clinit>(HibernateUtil.java:8)
at HibernateUtilTest.main(HibernateUtilTest.java:9)
Caused by: org.hibernate.MappingException: Unable to load class [ org.zh.domain] declared in Hibernate configuration <mapping/> entry
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2139)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2087)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2067)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2020)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1935)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1914)
at org.zh.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:11)
... 2 more
Caused by: java.lang.ClassNotFoundException: org.zh.domain
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2136)
... 8 more
domain object:
package org.zh.domain;

public class Student {
private int id;
private String name;
private int age;

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

}
student.htm.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="org.zh.domain" >
<class name="Student" table="stuinfo">
<id name="id">
<generator class="native" />
</id>
<property name="name" />
<property name="age" />
</class>
</hibernate-mapping>
hibernate.cfg.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connction.driver_class">com.mysql.jdbc.Driver</property>
<property name="connction.url">jdbc:mysql:/127.0.0.1:3306/studb?useUnicode=true&characterEncoding=utf8
</property>
<property name="connction.username">root</property>
<property name="connction.password">uwec4v4w</property>
<property name="connction.pool_size">5</property>
<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="current_session_context_class">thread</property>
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<mapping class="org.zh.domain"/>
</session-factory>
</hibernate-configuration>
测试文件：
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistryBuilder;
import org.zh.domain.Student;

public class Test {

public static void main(String[] args) {
Configuration cfg=new Configuration().configure();
ServiceRegistryBuilder srb=new ServiceRegistryBuilder().applySettings(cfg.getProperties());
SessionFactory sf=cfg.buildSessionFactory(srb.buildServiceRegistry());
Session s=sf.getCurrentSession();
Transaction tx=s.beginTransaction();
Student st=new Student();
st.setName("zhangsan");
st.setAge(20);
s.save(st);
tx.commit();
s.close();
}

}

[梦想涨价了]

映射文件写错了呀。字段映射不对

[梦想涨价了]

报错就是文件映射语法错误。正确的字段映射是这样的。

<property name="checkUnitId" type="java.lang.Long">
			<column name="CHECK_UNIT_ID" precision="22" scale="0" />
		</property>

[且活且珍惜]

<property name="age" />不用写column吗?我也很久没写

[Eniak]

引用 3 楼 enterys 的回复:

报错就是文件映射语法错误。正确的字段映射是这样的。

<property name="checkUnitId" type="java.lang.Long">
			<column name="CHECK_UNIT_ID" precision="22" scale="0" />
		</property>

哪里错了，没看出来

[梦想涨价了]

引用 4 楼 Eniak 的回复:

[quote=引用 3 楼 enterys 的回复:] 报错就是文件映射语法错误。正确的字段映射是这样的。

<property name="checkUnitId" type="java.lang.Long">
			<column name="CHECK_UNIT_ID" precision="22" scale="0" />
		</property>

哪里错了，没看出来[/quote] property不映射表字段，只有name没有column怎么能正确对应？

[Eniak]

引用 5 楼 enterys 的回复:

[quote=引用 4 楼 Eniak 的回复:] [quote=引用 3 楼 enterys 的回复:] 报错就是文件映射语法错误。正确的字段映射是这样的。

<property name="checkUnitId" type="java.lang.Long">
			<column name="CHECK_UNIT_ID" precision="22" scale="0" />
		</property>

哪里错了，没看出来[/quote] property不映射表字段，只有name没有column怎么能正确对应？[/quote] 如果一样。可以不用写吧？ 或者说，不写就是默认一样了？

[vtnews]

我也是初学者，我相信lz肯定已经变大神了，嘻嘻。那我就把这个问题的解决方案分享给同样是hibernate初学者的人吧。 把问题锁定在提示信息上org.hibernate.MappingException: Unable to load class [ org.zh.domain] declared in Hibernate configuration <mapping/> entry。 可见此文件org.zh.domain没有被映射到mapping文件中（student.htm.xml），那为什么要我们去定义这个实体呢，又是在哪定义的。我也没学过。但在hibernate.cfg.xml配置文件中有一个<mapping class="org.zh.domain"/>的定义，我想这就是出问题的原因吧，定义了要映射的文件是org文件下的zh文件中的domain类。但实际上我们是直接拷贝这个hibernate.cfg.xml文件到（我想大多都是），根本没定义。所以，，替换并改之