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>