Hibernate 中继承映射之三 每一个类一个表

在数据库中建立表：

mail：id,redipient,phone,address,postcode             <id><pk>

post_mail:id,parcel_number                                  <id><pk,fk(mail)>

express_mail:id,express_number,express_company  <id><pk,fk(mail)>

新建java project项目：chapter14_pertable

Add  Hibernate Capabilities

手工编写  Delivery.java         PostDelivery.java            ExperssDelivey.java

Delivery.java

代码：

/**  *  */ package com.b510.examples;

/**  *  * @author XHW  *  * @date 2011-7-9  *  */ public class Delivery {

 private Integer id;  private String recipient;  private String phone;  private String address;  private String postcode;  /**   * @return the id   */  public Integer getId() {   return id;  }  /**   * @param id the id to set   */  public void setId(Integer id) {   this.id = id;  }  /**   * @return the recipient   */  public String getRecipient() {   return recipient;  }  /**   * @param recipient the recipient to set   */  public void setRecipient(String recipient) {   this.recipient = recipient;  }  /**   * @return the phone   */  public String getPhone() {   return phone;  }  /**   * @param phone the phone to set   */  public void setPhone(String phone) {   this.phone = phone;  }  /**   * @return the address   */  public String getAddress() {   return address;  }  /**   * @param address the address to set   */  public void setAddress(String address) {   this.address = address;  }  /**   * @return the postcode   */  public String getPostcode() {   return postcode;  }  /**   * @param postcode the postcode to set   */  public void setPostcode(String postcode) {   this.postcode = postcode;  } }

PostDelivery.java

代码：

/**  *  */ package com.b510.examples;

/**  *  * @author XHW  *  * @date 2011-7-9  *  */ public class PostDelivery extends Delivery{

 private String parcelNumber;

 /**   * @return the parcelNumber   */  public String getparcelNumber() {   return parcelNumber;  }

 /**   * @param parcelNumber the parcelNumber to set   */  public void setparcelNumber(String parcelNumber) {   this.parcelNumber = parcelNumber;  }  }

ExpressDelivery.java

代码；

/**  *  */ package com.b510.examples;

/**  *  * @author XHW  *  * @date 2011-7-9  *  */ public class ExpressDelivery extends Delivery {

 private String expressNumber;  private String expressCompany;  /**   * @return the expressNumber   */  public String getExpressNumber() {   return expressNumber;  }  /**   * @param expressNumber the expressNumber to set   */  public void setExpressNumber(String expressNumber) {   this.expressNumber = expressNumber;  }  /**   * @return the expressCompany   */  public String getExpressCompany() {   return expressCompany;  }  /**   * @param expressCompany the expressCompany to set   */  public void setExpressCompany(String expressCompany) {   this.expressCompany = expressCompany;  } }

Delivery.hbm.xml

代码：

<?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.b510.examples.Delivery" table="mail" catalog="users">         <id name="id" type="java.lang.Integer">             <column name="id" />             <generator class="increment" />         </id>         <property name="recipient" type="java.lang.String">             <column name="recipient" length="200" />         </property>         <property name="phone" type="java.lang.String">             <column name="phone" length="200" />         </property>         <property name="address" type="java.lang.String">             <column name="address" length="400" />         </property>         <property name="postcode" type="java.lang.String">             <column name="postcode" length="10" />         </property>

<joined-subclass name="com.b510.examples.PostDelivery" table="post_mail">         <key column="id" foreign-key="id"></key>         <property name="parcelNumber" type="java.lang.String">             <column name="parcel_number" length="30" />         </property>         </joined-subclass> <joined-subclass name="com.b510.examples.ExpressDelivery" table="express_mail">         <key column="id" foreign-key="id"></key>         <property name="expressCompany" type="java.lang.String">             <column name="express_company" length="40" />         </property>         <property name="expressNumber" type="java.lang.String">             <column name="express_number" length="40" />         </property>         </joined-subclass>     </class> </hibernate-mapping>

测试代码：

HibernateTest.java

代码：

/**  *  */ package com.b510.examples;

import java.util.List;

import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction;

/**  *  * @author XHW  *  * @date 2011-7-9  *  */ public class HibernateTest {

 /**   * @param args   */  public static void main(String[] args) {   HibernateTest test=new HibernateTest();   //test.insertDelivery();   test.listPostDelivery();   test.listExpressDelivery();  }

 public void insertDelivery() {   Session session = HibernateSessionFactoryUtil.getSessionFactory()     .openSession();   Transaction tx = session.beginTransaction();

  PostDelivery post = new PostDelivery();   post.setRecipient("Hongten");   post.setAddress("广州大学");   post.setPhone("115");   post.setPostcode("510006");   post.setparcelNumber("订单号：ACD123SDJF23");

  ExpressDelivery express = new ExpressDelivery();   express.setRecipient("HongWei");   express.setAddress("四川成都");   express.setPhone("123465");   express.setPostcode("456789");   express.setExpressNumber("订单号：423SDFSJDKLF");   express.setExpressCompany("顺丰快递公司");   try {    session.save(post);    session.save(express);   } catch (Exception e) {    e.printStackTrace();    if (tx.isActive()) {     tx.rollback();    }   }   session.getTransaction().commit();  }  public void listPostDelivery(){   Session session=HibernateSessionFactoryUtil.getSessionFactory().openSession();   session.beginTransaction();   Query query=session.createQuery("from PostDelivery");   List<PostDelivery> list=query.list();   session.getTransaction().commit();   for(PostDelivery post:list){    System.out.println(post.getId());    System.out.println(post.getAddress());    System.out.println(post.getRecipient());    System.out.println(post.getparcelNumber());   }  }  public void listExpressDelivery(){   Session session=HibernateSessionFactoryUtil.getSessionFactory().openSession();   session.beginTransaction();   Query query=session.createQuery("from ExpressDelivery");   List<ExpressDelivery> list=query.list();   session.getTransaction().commit();   for(ExpressDelivery express:list){    System.out.println(express.getId());    System.out.println(express.getAddress());    System.out.println(express.getRecipient());    System.out.println(express.getExpressCompany());    System.out.println(express.getExpressNumber());   }  } }

运行效果：

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment). log4j:WARN Please initialize the log4j system properly. Hibernate:     select         postdelive0_.id as id0_,         postdelive0_1_.recipient as recipient0_,         postdelive0_1_.phone as phone0_,         postdelive0_1_.address as address0_,         postdelive0_1_.postcode as postcode0_,         postdelive0_.parcel_number as parcel2_1_     from         post_mail postdelive0_     inner join         users.mail postdelive0_1_             on postdelive0_.id=postdelive0_1_.id 1 广州大学 Hongten 订单号：ACD123SDJF23 Hibernate:     select         expressdel0_.id as id0_,         expressdel0_1_.recipient as recipient0_,         expressdel0_1_.phone as phone0_,         expressdel0_1_.address as address0_,         expressdel0_1_.postcode as postcode0_,         expressdel0_.express_company as express2_2_,         expressdel0_.express_number as express3_2_     from         express_mail expressdel0_     inner join         users.mail expressdel0_1_             on expressdel0_.id=expressdel0_1_.id 2 四川成都 HongWei 顺丰快递公司 订单号：423SDFSJDKLF