Java中Hibernate持久化类(map)集合属性的元素为组件的映射

<hibernate-configuration>
<session-factory>
    <!-- 配置数据库方言 -->
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <!-- 配置数据库的驱动 -->
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <!-- 配置数据库用户名 -->
    <property name="hibernate.connection.username">root</property>
    <!-- 配置数据库的密码 -->
    <property name="hibernate.connection.password">root</property>
    <!-- 配置数据库的url -->
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property>
    <!-- 配置数据池的最大容量 -->
    <property name="hibernate.c3p0.max_size">20</property>
    <!-- 配置数据池的最小容量 -->
    <property name="hibernate.c3p0.min_size">1</property>
    <!-- 配置数据链接的超时界限 -->
    <property name="hibernate.c3p0.timeout">5000</property>
    <!-- 在控制台显示后台是否打印执行的sql -->
    <property name="hibernate.show_sql">true</property>
    <!-- 是否以友好的格式显示打印的sql -->
    <property name="hibernate.format_sql">true</property>
    <!-- 打印一些辅助性的注释 -->
    <property name="hibernate.use_sql_comments">true</property>

    <property name="hibernate.c3p0.max_statements">100</property>
    <property name="hibernate.c3p0.idle_test_period">3000</property>
    <property name="hibernate.c3p0.acquire_increment">2</property>
    <property name="hibernate.c3p0.validate">true</property>
    <!-- 配置数据操作的方式 -->
    <property name="hbm2ddl.auto">create</property>
    <!-- 将我们上面 Member 的映射文件添加进来 -->
    <mapping resource="org/Rudiment/hibernate/Member.hbm.xml" />
</session-factory>
</hibernate-configuration>

import java.util.HashMap;
import java.util.Map;

public class Member {
    private Integer id;
    private String name;
    private Integer age;
    private Map<String, Address> addresses = new HashMap<String, Address>();
   
   
    public Map<String, Address> getAddresses() {
        return addresses;
    }
    public void setAddresses(Map<String, Address> addresses) {
        this.addresses = addresses;
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
   
}

import java.util.HashMap;
import java.util.Map;

public class Address {

    private String street;
    private String zipCode;
    private String city;

    private Member owner;
   
    public Member getOwner() {
        return owner;
    }
    public void setOwner(Member owner) {
        this.owner = owner;
    }
    public String getStreet() {
        return street;
    }
    public void setStreet(String street) {
        this.street = street;
    }
    public String getZipCode() {
        return zipCode;
    }
    public void setZipCode(String zipCode) {
        this.zipCode = zipCode;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
}

import java.util.HashMap;
import java.util.Map;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class MemberHandler {

     public static void insert() {
             Configuration conf = new Configuration();
             conf.configure();
             ServiceRegistry sr = new ServiceRegistryBuilder().applySettings(conf.getProperties()).buildServiceRegistry();
             SessionFactory sf = conf.buildSessionFactory(sr);
             Session session = sf.openSession();
            session.beginTransaction();
            Member m = new Member();
            m.setAge(24);
            m.setName("Louis");
           
            Address ad1 = new Address();
            ad1.setCity("广州");
            ad1.setOwner(m);
            ad1.setStreet("一号街");
            ad1.setZipCode("123");

            Address ad2 = new Address();
            ad2.setCity("深圳");
            ad2.setOwner(m);
            ad2.setStreet("二号街");
            ad2.setZipCode("456");

            Map<String, Address> am = new HashMap<String, Address>();
            am.put("地址一", ad1);
            am.put("地址二", ad2);

            m.setAddresses(am);
           
            session.save(m);
            session.getTransaction().commit();
            session.close();
        }
   
    public static void main(String[] args) {
            insert();
    }

}

mysql> select * from test_member;
+----+------+-------+
| ID | AGE  | NAME  |
+----+------+-------+
|  1 |   24 | Louis |
+----+------+-------+
1 row in set (0.00 sec)

mysql> select * from test_component;
+--------------+-------------+---------------+-----------+---------------+
| component_id | home_street | home_zip_code | home_city | component_key |
+--------------+-------------+---------------+-----------+---------------+
|            1 | 一号街      | 123           | 广州      | 地址一        |
|            1 | 二号街      | 456           | 深圳      | 地址二        |
+--------------+-------------+---------------+-----------+---------------+
2 rows in set (0.00 sec)