下面就说一个例子，环境j2sdk1.4.2_04,tomcat4.1.27,eclipse3.0,hibernate2.1
数据库的结果如下：
create table Users (
LogonID VARCHAR(255) not null,
EmailAddress VARCHAR(255),
LastLogon DATE,
Password VARCHAR(255),
Name VARCHAR(255),
primary key (LogonID)
);
create table Address2 (
ID VARCHAR(255) not null,
City VARCHAR(255),
State VARCHAR(255),
Zip VARCHAR(255),
primary key (ID)
);
create table Contacts (
ID BIGINT not null,
EmailAddress VARCHAR(255),
Name VARCHAR(255),
User_ID VARCHAR(255),
primary key (ID)
);
alter table Contacts add constraint FKE207C4735A7381EF foreign key (User_ID) references Users;
create index IXE207C4735A7381EF on Contacts (User_ID);
eclipse安装好hibernate插件后，许多比较繁琐，容易出错的配置文件，eclipse都可以帮您很好的自动生成
其中Address2,Contacts,Users相当于实体bean，实现对数据表的映射。由于表Users和Contacts存在one-to-many关系，所以在Users.java的实现中将Contacts也作为一个对象属性。
private java.util.Set _contactsSet;
/**
* Return the value associated with the column: ContactsSet
*/
public java.util.Set getContactsSet () {
return this._contactsSet;
}
/**
* Set the value related to the column: ContactsSet
* @param _contactsSet the ContactsSet value
*/
public void setContactsSet (java.util.Set _contactsSet) {
this._contactsSet = _contactsSet;
}
public void addToContactsSet (Object obj) {
if (null == this._contactsSet) this._contactsSet = new java.util.HashSet();
this._contactsSet.add(obj);
}
一般情况下，hibernate实现数据库的连接有两种方式，一种是借助web服务器的连接池，一种是自己配置连接参数文件。这里只介绍第二种方式：
<hibernate-configuration>
<session-factory>
<!-- local connection properties -->
<!--数据库路径-->
<property name="hibernate.connection.url">
jdbc:jtds:sqlserver://192.198.64.168:1433;databasename=test;SelectMethod=Cursor
</property>
<!--连接驱动-->
<property name="hibernate.connection.driver_class">
net.sourceforge.jtds.jdbc.Driver
</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sasa</property>
<!-- property name="hibernate.connection.pool_size"></property -->
<!-- 数据库方言 -->
<property name="dialect">
net.sf.hibernate.dialect.SQLServerDialect
</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.use_outer_join">true</property>
<!-- mapping 文件-->
<mapping resource="com/head/multi/Contacts.hbm" />
<mapping resource="com/head/multi/Users.hbm" />
<mapping resource="com/head/multi/Address2.hbm" />
</session-factory>
</hibernate-configuration>
