学步园

Hibernate 组件元素配置

一个学生有多个地址，比如：家庭地址，学校地址等 ，可以把这些地址以一个单独的类分离出来，但最后保存到数据库中还是只有一张表！

Student.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
 "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>
	
	<class name="com.wansha.pojo.Student" table="student">
		<id name="id" column="id" type="int">
			<generator class="identity"></generator>
		</id>
		<property name="name" column="name" type="string" />
		<component name="address" class="com.wansha.pojo.Address">
			<property name="homeAddress" column="homeAddress" type="string" />
			<property name="companyAddress" column="companyAddress" type="string" />
		</component>
	</class>
	
</hibernate-mapping>  

Student.java

package com.wansha.pojo;

public class Student {
	private int id;
	private String name;
	private Address address;
	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 Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
}

Address.java

package com.wansha.pojo;

public class Address {
	private String homeAddress;
	private String companyAddress;
	public String getHomeAddress() {
		return homeAddress;
	}
	public void setHomeAddress(String homeAddress) {
		this.homeAddress = homeAddress;
	}
	public String getCompanyAddress() {
		return companyAddress;
	}
	public void setCompanyAddress(String companyAddress) {
		this.companyAddress = companyAddress;
	}
}