3.hibernate联合主键,xml映射

package com.bjsxt.hibernate;public class StudentPK implements java.io.Serializable{private int id;private String name;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic boolean equals(Object o) {if(o instanceof StudentPK) {StudentPK pk = (StudentPK)o;if(this.id == pk.getId() && this.name.equals(pk.getName())) {return true;}}return false;}@Overridepublic int hashCode() {return this.name.hashCode();}}

package com.bjsxt.hibernate;public class Student {private StudentPK pk;private int age;private String sex;private boolean good;public boolean isGood() {return good;}public void setGood(boolean good) {this.good = good;}/*public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}*/public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public StudentPK getPk() {return pk;}public void setPk(StudentPK pk) {this.pk = pk;}}

<?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="com.bjsxt.hibernate.Student"><composite-id name="pk" /><property name="sex" /><property name="good" type="yes_no"></property>    </class></hibernate-mapping>