Hibernate逍遥游记-第8章 映射组成关系(<component>、<parent>)

一、

1.

<?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 >

  <class name="mypack.Monkey" table="MONKEYS" >
    <id name="id" type="long" column="ID">
      <generator class="increment"/>
    </id>

    <property name="name" type="string" column="NAME" />
 
    <component name="homeAddress" class="mypack.Address">
            <parent name="monkey" />
            <property name="province" type="string" column="HOME_PROVINCE"/>
            <property name="city" type="string" column="HOME_CITY"/>
            <property name="street" type="string" column="HOME_STREET"/>
            <property name="zipcode" type="string" column="HOME_ZIPCODE"/>
    </component>
        
    <component name="comAddress" class="mypack.Address">
           <parent name="monkey" />
           <property name="province" type="string" column="COM_PROVINCE"/> 
           <property name="city" type="string" column="COM_CITY"/>
           <property name="street" type="string" column="COM_STREET"/> 
           <property name="zipcode" type="string" column="COM_ZIPCODE"/>
    </component>
  </class>

</hibernate-mapping>

 

2.

package mypack;
public class Monkey {


     private long id;
     private String name;
     private Address homeAddress;
     private Address comAddress;

    public Monkey() {
    }

    public Monkey(String name, Address homeAddress, Address comAddress) {
       this.name = name;
       this.homeAddress = homeAddress;
       this.comAddress = comAddress;
    }
   
    public long getId() {
        return this.id;
    }
    
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return this.name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    public Address getHomeAddress() {
        return this.homeAddress;
    }
    
    public void setHomeAddress(Address homeAddress) {
        this.homeAddress = homeAddress;
    }
    public Address getComAddress() {
        return this.comAddress;
    }
    
    public void setComAddress(Address comAddress) {
        this.comAddress = comAddress;
    }




}

3.

package mypack;
public class Address {


     private String province;
     private String city;
     private String street;
     private String zipcode;
     private Monkey monkey;

    public Address() {
    }

    public Address(String province, String city, String street, String zipcode,Monkey monkey) {
       this.province = province;
       this.city = city;
       this.street = street;
       this.zipcode = zipcode;
       this.monkey=monkey;
    }
   
    public String getProvince() {
        return this.province;
    }
    
    public void setProvince(String province) {
        this.province = province;
    }
    public String getCity() {
        return this.city;
    }
    
    public void setCity(String city) {
        this.city = city;
    }
    public String getStreet() {
        return this.street;
    }
    
    public void setStreet(String street) {
        this.street = street;
    }
    public String getZipcode() {
        return this.zipcode;
    }
    
    public void setZipcode(String zipcode) {
        this.zipcode = zipcode;
    }

    public Monkey getMonkey() {
        return this.monkey;
    }

    public void setMonkey(Monkey monkey) {
        this.monkey = monkey;
    }



}

二、电脑例子

4.

<?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 >

  <class name="mypack.Computer" table="COMPUTERS" >
    <id name="id" type="long" column="ID">
      <generator class="increment"/>
    </id>

    <property name="type" type="string" >
        <column name="COMPUTER_TYPE" />
    </property>
    
    <component name="cpuBox" class="mypack.CpuBox">
            <parent name="computer" />
            
            <property name="type" type="string" >
                <column name="CPUBOX_TYPE" />
            </property>
            
            <component name="graphicsCard" class="mypack.GraphicsCard">
               <parent name="cpuBox" />
              
               <property name="type" type="string" >
                  <column name="GRAPHICSCARD_TYPE" />
               </property>

            </component>

            <many-to-one
                name="vendor"
                column="CPUBOX_VENDOR_ID"
                class="mypack.Vendor"
                not-null="true" 
            />
    </component>
  </class>
 

</hibernate-mapping>

5.

<?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 >

  <class name="mypack.Vendor" table="VENDORS" >
    <id name="id" type="long" column="ID">
      <generator class="increment"/>
    </id>

    <property name="type" type="string" >
        <column name="TYPE" length="15" />
    </property>
    
  
  </class>

</hibernate-mapping>

6.

package mypack;
public class Computer {


     private long id;
     private String type;
     private CpuBox cpuBox;

    public Computer() {
    }

    
    public Computer(CpuBox cpuBox) {
        this.cpuBox = cpuBox;
    }
    public Computer(String type, CpuBox cpuBox) {
       this.type = type;
       this.cpuBox = cpuBox;
    }
   
    public long getId() {
        return this.id;
    }
    
    public void setId(long id) {
        this.id = id;
    }
    public String getType() {
        return this.type;
    }
    
    public void setType(String type) {
        this.type = type;
    }
    public CpuBox getCpuBox() {
        return this.cpuBox;
    }
    
    public void setCpuBox(CpuBox cpuBox) {
        this.cpuBox = cpuBox;
    }




}

7.

package mypack;
public class CpuBox {


     private String type;
     private GraphicsCard graphicsCard;
     private Vendor vendor;
     private Computer computer; 
    public CpuBox() {
    }

    
    public CpuBox(Vendor vendor) {
        this.vendor = vendor;
    }
    public CpuBox(String type, GraphicsCard graphicsCard, Vendor vendor,Computer computer) {
       this.type = type;
       this.graphicsCard = graphicsCard;
       this.vendor = vendor;
       this.computer=computer;  
    }
   
    public String getType() {
        return this.type;
    }
    
    public void setType(String type) {
        this.type = type;
    }
    public GraphicsCard getGraphicsCard() {
        return this.graphicsCard;
    }
    
    public void setGraphicsCard(GraphicsCard graphicsCard) {
        this.graphicsCard = graphicsCard;
    }
    public Vendor getVendor() {
        return this.vendor;
    }
    
    public void setVendor(Vendor vendor) {
        this.vendor = vendor;
    }

    public Computer getComputer() {
        return this.computer;
    }
    
    public void setComputer(Computer computer) {
        this.computer=computer;
    }



}

8.

package mypack;



public class GraphicsCard  {


     private String type;
     private CpuBox cpuBox;

    public GraphicsCard() {
    }

    public GraphicsCard(String type,CpuBox cpuBox) {
       this.type = type;
       this.cpuBox=cpuBox;
    }
   
    public String getType() {
        return this.type;
    }
    
    public void setType(String type) {
        this.type = type;
    }

    public CpuBox getCpuBox() {
        return this.cpuBox;
    }
    
    public void setCpuBox(CpuBox cpuBox) {
        this.cpuBox = cpuBox;
    }


}

9.

package mypack;
public class Vendor {


     private long id;
     private String type;

    public Vendor() {
    }

    public Vendor(String type) {
       this.type = type;
    }
   
    public long getId() {
        return this.id;
    }
    
    public void setId(long id) {
        this.id = id;
    }
    public String getType() {
        return this.type;
    }
    
    public void setType(String type) {
        this.type = type;
    }




}

10.

use sampledb;
drop table if exists COMPUTERS;
drop table if exists MONKEYS;
drop table if exists VENDORS;

create table MONKEYS (ID bigint not null, NAME varchar(15), HOME_PROVINCE varchar(255), 
HOME_CITY varchar(255), HOME_STREET varchar(255), HOME_ZIPCODE varchar(255), 
COM_PROVINCE varchar(255), COM_CITY varchar(255), 
COM_STREET varchar(255), COM_ZIPCODE varchar(255), primary key (ID));

create table COMPUTERS (ID bigint not null, COMPUTER_TYPE varchar(15), 
CPUBOX_TYPE varchar(15), GRAPHICSCARD_TYPE varchar(15), 
CPUBOX_VENDOR_ID bigint not null, primary key (ID));

create table VENDORS (ID bigint not null, TYPE varchar(15), primary key (ID));

alter table COMPUTERS add index IDX_VENDOR (CPUBOX_VENDOR_ID),
add constraint FK_VENDOR foreign key (CPUBOX_VENDOR_ID) 
references VENDORS (ID);

11.

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-configuration
 PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="dialect">
            org.hibernate.dialect.MySQLDialect
        </property>
        <property name="connection.driver_class">
            com.mysql.jdbc.Driver
        </property>
        <property name="connection.url">
            jdbc:mysql://localhost:3306/sampledb
        </property>
        <property name="connection.username">
            root
        </property>
        <property name="connection.password">
            1234
        </property>

        <property name="show_sql">true</property>

        <mapping resource="mypack/Monkey.hbm.xml" />
        <mapping resource="mypack/Computer.hbm.xml" />
        <mapping resource="mypack/Vendor.hbm.xml" />

    </session-factory>
</hibernate-configuration>