一对一双向外键关联
妻子和丈夫：? 在丈夫表里面有妻子的外键
学生和学生证：? 在学生证表里面有学生的外键
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第一种：Annotation配置
package com.zchen.hibernate.oneTone;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;import javax.persistence.Table;@Entity@Table(name="T_HUSBAND")public class Husband {private int id;private String name;private Wife wife;@OneToOne@JoinColumn(name="WIFE_ID")public Wife getWife() {return wife;}public void setWife(Wife wife) {this.wife = wife;}@Id@GeneratedValuepublic 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;}}?
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package com.zchen.hibernate.oneTone;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.OneToOne;import javax.persistence.Table;@Entity@Table(name="T_WIFE")public class Wife {private int id;private String name;private Husband husband;@OneToOne(mappedBy="wife")public Husband getHusband() {return husband;}public void setHusband(Husband husband) {this.husband = husband;}@Id@GeneratedValuepublic 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;}}?
?第二种：xml配置
package com.zchen.hibernate.oneTone;public class Student {private int id;private String name;private StudentIdCard stuIdCard;public StudentIdCard getStuIdCard() {return stuIdCard;}public void setStuIdCard(StudentIdCard stuIdCard) {this.stuIdCard = stuIdCard;}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;}}?
package com.zchen.hibernate.oneTone;public class StudentIdCard {private int id;private String name;private Student student;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 Student getStudent() {return student;}public void setStudent(Student student) {this.student = student;}}?
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<?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 package="com.zchen.hibernate.oneTone"> <class name="StudentIdCard" table="T_STUIDCARD"> <id name="id" column="ID"> <generator column="NAME"/> <many-to-one name="student" column="STUID" unique="true"></many-to-one> </class></hibernate-mapping>
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<?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 package="com.zchen.hibernate.oneTone"> <class name="Student" table="T_STU"> <id name="id" column="ID"> <generator column="NAME"/> <one-to-one name="stuIdCard" property-ref="student"></one-to-one> </class></hibernate-mapping>
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