Help! spring 下 hibernate的一个异常。

[gen_fossil]

我对表employee和address进行了map，employee中的address_Id是外键，
address的xml配置:
<set name="employees" inverse="true">
<key>
<column name="address_Id" />
</key>
<one-to-many class="addressmap.Employee" />
</set>
employee的xml配置：
<many-to-one name="address" class="employeemap.Address" fetch="select">
<column name="address_Id" />
</many-to-one>
applicationContext.xml 中的bean的配置：
<bean id="AddressDAO" class="addressmap.AddressDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="EmployeeDAO" class="employeemap.EmployeeDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>

在执行到：ApplicationContext ctx = new FileSystemXmlApplicationContext(
"src/applicationContext.xml");时抛出异常：

Error creating bean with name 'sessionFactory' defined in file

[C:\Documents and Settings\chenzhou.chen\Desktop\workspace\crmdemo3\src\applicationContext.xml]:

Initialization of bean failed;

nested exception is org.hibernate.MappingException: Association references unmapped class: addressmap.Employee

org.hibernate.MappingException: Association references unmapped class: addressmap.Employee

......
请问是怎么回事？

[gen_fossil]

有人帮我看看吗？我弄了很长时间了，不知道怎么回事。
我也试过先map没有外键关系的两张表，然后再在各自的hbm.xml文件 中配置many-to-one
<many-to-one
name = "address"
column ="addressId"
unique = "true"
not-null ="true"
/> 结果有这样的异常Initialization of bean failed; nested exception is org.hibernate.PropertyNotFoundException: field not found: address
org.hibernate.PropertyNotFoundException: field not found: address

有谁告诉我正确的使用外键的方法是怎样的？

[elvihuang]

field not found: address
这个是你的bean里没有address这个属性