多对一关联映射

例如：员工与部门的关系（员工类型中存在一个部门的引用）

   部门

package com.chris.entity;

/**
 * 部门
 * @author Administrator
 *
 */
public class Department {

	private int id;
	private String name;
	
	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;
	}
}

  员工

package com.chris.entity;

/**
 * 员工
 * @author Administrator
 *
 */
public class Employee {

	private int id;
	private String name;
	private Department department;
	
	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 Department getDepartment() {
		return department;
	}
	public void setDepartment(Department department) {
		this.department = department;
	}
}

 部门映射文件：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.chris.entity">
	
	<class name="Department">
		<id name="id">
			<generator class="native"/>
		</id>
		<property name="name" unique="true"/>
	</class>
</hibernate-mapping>

 员工映射文件：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.chris.entity">
	
	<class name="Employee">
		<id name="id">
			<generator class="native"/>
		</id>
		<property name="name"/>
		<!-- 部门属性映射 -->
		<many-to-one name="department" column="department_id"/>
		<!-- 多对一标签会在员工表中创建一个外键引用部门表的主键 -->
	</class>
</hibernate-mapping>