Hibernate关系映射

One2One单向关联

One2One双向

One2One单向主键关联（不重要）

One2One单向主键关联Annotation（不重要，bug）

联合主键关联

组合映射(几个类 映射一个表）

多对一 单向关联

一对多单向映射

一对多，多对一双向

多对多的单向关联

多对多双向

 

 

 

 

 

 

One2One单向关联

1xml表示

 

<hibernate-mapping><class name="com.aspn.hibernate.StuIdCard"><id name="id"><generator class="native"></generator></id><property name="num"/><many-to-one name="student" column="studentId" unique="true"></many-to-one> </class></hibernate-mapping>  

 

2Annotaion表示

 

package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@OneToOne@JoinColumn(name="wifeId")public Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Wife {private int id;private String name;@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;}}

 

 

 

One2One双向

 

Annotation

package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@OneToOne@JoinColumn(name="wifeId")public Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}

 

xml

 package com.aspn.hibernate;public class Student {private int id;private String name;private int age;private String sex;private boolean good;private StuIdCard stuIdCard;public StuIdCard getSidcard() {return stuIdCard;}public void setSidcard(StuIdCard sidcard) {this.stuIdCard = sidcard;}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;}}package com.aspn.hibernate;public class StuIdCard {private int id;private String num;private Student student;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getNum() {return num;}public void setNum(String num) {this.num = num;}public Student getStudent() {return student;}public void setStudent(Student student) {this.student = student;}}

 

<?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.aspn.hibernate.Student" dynamic-update="true"><id name="id"><generator class="native"></generator></id><property name="name"></property><property name="age" /><property name="sex" /><property name="good" type="yes_no"></property><one-to-one name="stuIdCard" property-ref="student"></one-to-one> </class></hibernate-mapping><?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.aspn.hibernate.StuIdCard"><id name="id"><generator class="native"></generator></id><property name="num"/><many-to-one name="student" column="studentId" unique="true"></many-to-one> </class></hibernate-mapping>

 

 

 One2One单向主键关联（不重要）

<?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.StuIdCard"><id name="id"><generator class="foreign"><param name="property">student</param></generator></id><property name="num"/><one-to-one name="student" constrained="true"></one-to-one> </class></hibernate-mapping><?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" dynamic-update="true"><id name="id"><generator class="native"></generator></id><property name="name"></property><property name="age" /><property name="sex" /><property name="good" type="yes_no"></property> </class></hibernate-mapping>

 

Annotation（不重要，bug）

package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToOne;import javax.persistence.PrimaryKeyJoinColumn;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@OneToOne@PrimaryKeyJoinColumnpublic Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Wife {private int id;private String name;@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;}}

 

联合主键关联

Annotation

package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.JoinColumns;import javax.persistence.OneToOne;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@OneToOne@JoinColumns( //不写这个hibernate自己默认给我们字段的名字 wife_id{@JoinColumn(name="wife___Id",referencedColumnName="id"),//自己能改字段的名字@JoinColumn(name="wife___Name",referencedColumnName="name")//自己能改字段的名字})public Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.Id;import javax.persistence.IdClass;@Entity@IdClass(WifePK.class) //当用 用 组合键的时候使用 下面用 @id来指明组合键 public class Wife {private int id;private String name;@Idpublic int getId() {return id;}public void setId(int id) {this.id = id;}@Idpublic String getName() {return name;}public void setName(String name) {this.name = name;}}package com.aspn.hibernate;public class WifePK {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;}} 

 

xml方式

。。。

 

组合映射(几个类 映射一个表）

Annotation方式

package com.aspn.hibernate;import javax.persistence.Embedded;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Husband {private int id;private String name;private Wife wife;@Id@GeneratedValuepublic int getId() {return id;}public String getName() {return name;}@Embedded //这个起到嵌入进来的作用public Wife getWife() {return wife;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setWife(Wife wife) {this.wife = wife;}}package com.aspn.hibernate;public class Wife {private String wifeName;private int age;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getWifeName() {return wifeName;}public void setWifeName(String name) {this.wifeName = name;}} 

 

xml 

<?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.Husband" ><id name="id"><generator class="native"></generator></id><property name="name"></property><component name="wife"><property name="wifeName"></property><property name="age"></property></component> </class></hibernate-mapping> 

 

多对一 单向关联

Annotation

package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.ManyToOne;import javax.persistence.Table;@Entity@Table(name="t_user")public class User {private int id;private String name;private Group group;@ManyToOnepublic Group getGroup() {return group;}public void setGroup(Group group) {this.group = group;}@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;}}package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name="t_group")public class Group {private int id;private String name;@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;}} 

 

xml

<?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.User" table="t_user"><id name="id"><generator class="native"></generator></id><property name="name"></property><many-to-one name="group" column="groupId" /> </class></hibernate-mapping><?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.Group" table="t_group"><id name="id"><generator class="native"></generator></id><property name="name"></property> </class></hibernate-mapping> 

 

一对多单向映射

Annotation

package com.bjsxt.hibernate;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToMany;import javax.persistence.Table;@Entity@Table(name="t_group")public class Group {private int id;private String name;private Set<User> users = new HashSet<User>();@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;}@OneToMany@JoinColumn(name="groupId")public Set<User> getUsers() {return users;}public void setUsers(Set<User> users) {this.users = users;}}package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.ManyToOne;import javax.persistence.Table;@Entity@Table(name="t_user")public class User {private int id;private String name;@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;}} 

 

xml

<?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.Group" table="t_group"><id name="id"><generator class="native"></generator></id><property name="name"></property><set name="users"><key column="groupId"></key><one-to-many class="com.bjsxt.hibernate.User"/></set> </class></hibernate-mapping><?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.User" table="t_user"><id name="id"><generator class="native"></generator></id><property name="name"></property> </class></hibernate-mapping> 

 

一对多，多对一双向

Annotation

package com.bjsxt.hibernate;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.OneToMany;import javax.persistence.Table;@Entity@Table(name="t_group")public class Group {private int id;private String name;private Set<User> users = new HashSet<User>();@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;}@OneToMany(mappedBy="group")public Set<User> getUsers() {return users;}public void setUsers(Set<User> users) {this.users = users;}}package com.bjsxt.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.ManyToOne;import javax.persistence.Table;@Entity@Table(name="t_user")public class User {private int id;private String name;private Group group;@ManyToOnepublic Group getGroup() {return group;}public void setGroup(Group group) {this.group = group;}@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;}} 

 

xml

<?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.Group" table="t_group"><id name="id"><generator class="native"></generator></id><property name="name"></property><set name="users"><key column="groupId"></key><one-to-many class="com.bjsxt.hibernate.User"/></set> </class></hibernate-mapping><?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.User" table="t_user"><id name="id"><generator class="native"></generator></id><property name="name"></property><many-to-one name="group" column="groupId"></many-to-one> </class></hibernate-mapping> 

 

 

多对多的单向关联

Annocation

package com.aspn.hibernate;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.JoinTable;import javax.persistence.ManyToMany;@Entitypublic class Teacher {private int id;private String name;private Set<Student> students = new HashSet<Student>();@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;}@ManyToMany@JoinTable(name="t_s",joinColumns={@JoinColumn(name="teacher_id")},inverseJoinColumns={@JoinColumn(name="student_id")})public Set<Student> getStudents() {return students;}public void setStudents(Set<Student> students) {this.students = students;}}package com.aspn.hibernate;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Student {private int id;private String name;@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;}} 

 

 

xml

<?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.aspn.hibernate.Teacher"><id name="id"><generator class="native"></generator></id><property name="name"></property><set name="students" table="t_s"><key column="teacher_id"></key><many-to-many class="com.aspn.hibernate.Student" column="student_id"/></set> </class></hibernate-mapping><?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.aspn.hibernate.Student"><id name="id"><generator class="native"></generator></id><property name="name"></property> </class></hibernate-mapping> 

 

多对多双向

Annotation

package com.bjsxt.hibernate;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.JoinTable;import javax.persistence.ManyToMany;import javax.persistence.OneToMany;import javax.persistence.Table;@Entitypublic class Teacher {private int id;private String name;private Set<Student> students = new HashSet<Student>();@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;}@ManyToMany@JoinTable(name="t_s",joinColumns={@JoinColumn(name="teacher_id")},inverseJoinColumns={@JoinColumn(name="student_id")})public Set<Student> getStudents() {return students;}public void setStudents(Set<Student> students) {this.students = students;}}package com.bjsxt.hibernate;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.ManyToMany;@Entitypublic class Student {private int id;private String name;private Set<Teacher> teachers = new HashSet<Teacher>();@ManyToMany(mappedBy="students")public Set<Teacher> getTeachers() {return teachers;}public void setTeachers(Set<Teacher> teachers) {this.teachers = teachers;}@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;}} 

 

xml

<?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.Teacher"><id name="id"><generator class="native"></generator></id><property name="name"></property><set name="students" table="t_s"><key column="teacher_id"></key><many-to-many class="com.bjsxt.hibernate.Student" column="student_id"/></set> </class></hibernate-mapping><?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"><id name="id"><generator class="native"></generator></id><property name="name"></property><set name="teachers" table="t_s"><key column="student_id"></key><many-to-many class="com.bjsxt.hibernate.Teacher" column="teacher_id"/></set> </class></hibernate-mapping>