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摘要: Eclipse快速上手Hibernate--4. 继承映射(3)
Person.java
/* * Hibernate - 继承映射(每个具体类一个表) * 创建日期 2005-4-9 * @author javamxj(分享java快乐) * @link Blog: htpp://javamxj.mblogger.cn * htpp://blog.csdn.net/javamxj/ */ package javamxj.inheritance.three; public abstract class Person { private Long id; private String name; /** * @hibernate.id * column="ID" * generator-class="hilo" * unsaved-value="null" */ public Long getId() { return id; } public void setId(Long id) { this.id = id; } /** * @hibernate.property * length = "24" */ public String getName() { return name; } public void setName(String name) { this.name = name; } }
</td></tr>package javamxj.inheritance.three; /** * @hibernate.class * table="Student" */ public class Student extends Person { private String studentNumber; /** * @hibernate.property * length = "24" */ public String getStudentNumber() { return studentNumber; } public void setStudentNumber(String studentNumber) { this.studentNumber = studentNumber; } }
</td></tr>package javamxj.inheritance.three; /** * @hibernate.class * table="Professor" */ public class Professor extends Person { private int salary; /** * @hibernate.property */ public int getSalary() { return salary; } public void setSalary(int salary) { this.salary = salary; } }
Professor.hbm.xml
<?xml version="1.0" encoding="GBK"?> hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">To add non XDoclet generator parameters, create a file named hibernate-generator-params-Professor.xml containing the additional parameters and place it in your merge dir. To add non XDoclet property mappings, create a file named hibernate-properties-Professor.xml containing the additional properties and place it in your merge dir.
Student.hbm.xml
<?xml version="1.0" encoding="GBK"?> hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">To add non XDoclet generator parameters, create a file named hibernate-generator-params-Student.xml containing the additional parameters and place it in your merge dir. To add non XDoclet property mappings, create a file named hibernate-properties-Student.xml containing the additional properties and place it in your merge dir.
Demo.java
/* * Hibernate - 继承映射(每个具体类一个表) * 创建日期 2005-4-9 * @author javamxj(分享java快乐) * @link Blog: htpp://javamxj.mblogger.cn * htpp://blog.csdn.net/javamxj/ */ package javamxj.inheritance.three; import java.util.Iterator; import java.util.List; import net.sf.hibernate.HibernateException; import net.sf.hibernate.Session; import net.sf.hibernate.SessionFactory; import net.sf.hibernate.Transaction; import net.sf.hibernate.cfg.Configuration; public class Demo { public static void main(String[] args) { try { new Demo(); } catch (HibernateException he) { he.printStackTrace(); } } public Demo() throws HibernateException { SessionFactory sf = new Configuration().configure() .buildSessionFactory(); Session sess = sf.openSession(); Transaction tx = null; try { tx = sess.beginTransaction(); Student student = new Student(); student.setName("张三"); student.setStudentNumber("1234554321"); sess.save(student); Professor professor = new Professor(); professor.setName("李四"); professor.setSalary(4300); sess.save(professor); tx.commit(); } catch (HibernateException e) { if (tx != null) tx.rollback(); throw e; } finally { sess.close(); } sess = sf.openSession(); tx = null; try { tx = sess.beginTransaction(); List person = sess.find("from " + Person.class.getName()); for (Iterator it = person.iterator(); it.hasNext();) { Person p = (Person) it.next(); System.out.println("人员 '" + p.getName() + "' its class is: " + p.getClass().getName()); } tx.commit(); } catch (HibernateException e) { if (tx != null) tx.rollback(); throw e; } finally { sess.close(); } } }