Hibernate的多对多实例

时间：2022-09-06 21:33:17

在完成了一对多的实例的基础上，继续做多对多实例。例子是老师和学生，一个老师教多个学生，一个学生也有多个老师。

文档结构如图：

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*Kni90xIW6p+HB6h028hhv4YK6Z9Laa9U77KI7/3vigQCpe86rd2Sw0xYHBugOdTemuxeqdyhWvWFFXwMdBOsD6C6j7p6t3pEN3RVfd4sF3eXVPS+qd8i95B/qDnXPpHsOq3foU3N2DT2JhheoO9T9GvxUvQOAutsM2DuAPFZ3AIC6A4An8H/jAlKA+aui3gAAAABJRU5ErkJggg==" alt="" />

Student.java和Teacher.java的代码为：

 package cn.hibernate.manytomany;

 import java.util.HashSet;

 import java.util.Set;

 public class Student {

     private int stuId;

     private String stuName;

     private Set<Teacher> teachers = new HashSet<Teacher>();

     public Student(){

     }

     public Student(int stuId, String stuName, Set<Teacher> teachers) {

         this.stuId = stuId;

         this.stuName = stuName;

         this.teachers = teachers;

     }

     public int getStuId() {

         return stuId;

     }

     public void setStuId(int stuId) {

         this.stuId = stuId;

     }

     public String getStuName() {

         return stuName;

     }

     public void setStuName(String stuName) {

         this.stuName = stuName;

     }

     public Set<Teacher> getTeachers() {

         return teachers;

     }

     public void setTeachers(Set<Teacher> teachers) {

         this.teachers = teachers;

     }

 }

Student.java

 package cn.hibernate.manytomany;

 import java.util.HashSet;

 import java.util.Set;

 public class Teacher {

     private int teaId;

     private String teaName;

     private Set<Student> stus = new HashSet<Student>();

     public int getTeaId() {

         return teaId;

     }

     public void setTeaId(int teaId) {

         this.teaId = teaId;

     }

     public String getTeaName() {

         return teaName;

     }

     public void setTeaName(String teaName) {

         this.teaName = teaName;

     }

     public Set<Student> getStus() {

         return stus;

     }

     public void setStus(Set<Student> stus) {

         this.stus = stus;

     }

     public Teacher(int teaId, String teaName, Set<Student> stus) {

         this.teaId = teaId;

         this.teaName = teaName;

         this.stus = stus;

     }

     public Teacher(){

     }

 }

Teacher.java

在hibernate.cfg.xml最后添加映射关系：

<mapping resource="cn/hibernate/manytomany/teacher.hbm.xml"/>
<mapping resource="cn/hibernate/manytomany/student.hbm.xml"/>

teacher.hbm.xml和student.hbm.xml的代码为：

 <?xml version="1.0" encoding="UTF-8"?>

 <!DOCTYPE hibernate-mapping PUBLIC

     "-//Hibernate/Hibernate Mapping DTD//EN"

     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

     <hibernate-mapping>

         <class name="cn.hibernate.manytomany.Teacher" table="t_teacher">

             <id name="teaId" column="teaId">

                 <generator class="native"></generator>

             </id>

             <property name="teaName" column="teaName" />

             <!-- student不放弃外键的维护 -->

             <set name="stus" table="t_tea_stu" cascade="all" inverse="false">

                 <key column="teaId"></key>

                 <many-to-many class="cn.hibernate.manytomany.Student" column="stuId"></many-to-many>

             </set>

         </class>

     </hibernate-mapping>

teacher.hbm.xml

 <?xml version="1.0" encoding="UTF-8"?>

 <!DOCTYPE hibernate-mapping PUBLIC

     "-//Hibernate/Hibernate Mapping DTD//EN"

     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

     <hibernate-mapping>

         <class name="cn.hibernate.manytomany.Student" table="t_student">

             <id    name="stuId" column="stuId">

                 <generator class="native"></generator>

             </id>

             <property name="stuName" column="stuName"></property>

             <!-- teacher放弃外键的维护 -->

             <set name="teachers" table="t_tea_stu" cascade="all" inverse="true">

                 <key column="stuId"></key>

                 <many-to-many class="cn.hibernate.manytomany.Teacher" column="teaId"></many-to-many>

             </set>

         </class>

     </hibernate-mapping>

student.hbm.xml

MainFunc.java的代码为：

 package cn.hibernate.manytomany;

 import org.hibernate.Session;

 import org.hibernate.SessionFactory;

 import org.hibernate.Transaction;

 import org.hibernate.cfg.Configuration;

 public class MainFunc {

     public static void main(String[] args) {

         // TODO Auto-generated method stub

         Configuration cfg = new Configuration().configure();

         SessionFactory sessionFactory = cfg.buildSessionFactory();

         Session session = sessionFactory.openSession();

         Transaction tx = null;

         try{

             tx = session.beginTransaction();

             Teacher tea1 = new Teacher();

             tea1.setTeaName("Zhangsan");

             Teacher tea2 = new Teacher();

             tea2.setTeaName("Lisi");

             Student stu1 = new Student();

             stu1.setStuName("Sheldon");

             Student stu2 = new Student();

             stu2.setStuName("Leonard");

             Student stu3 = new Student();

             stu3.setStuName("Howard");

             Student stu4 = new Student();

             stu4.setStuName("Raj");

             //把student和teacher关联

             stu1.getTeachers().add(tea1);

             stu1.getTeachers().add(tea2);

             stu2.getTeachers().add(tea1);

             stu2.getTeachers().add(tea2);

             stu3.getTeachers().add(tea1);

             stu4.getTeachers().add(tea2);

             //把teacher和student关联

             tea1.getStus().add(stu1);

             tea1.getStus().add(stu2);

             tea1.getStus().add(stu3);

             tea2.getStus().add(stu1);

             tea2.getStus().add(stu2);

             tea2.getStus().add(stu4);

             //由于teacher放弃了外键的维护，所以没有session.save(tea1/tea2)

             session.save(stu1);

             session.save(stu2);

             session.save(stu3);

             session.save(stu4);

             System.out.println("Add success");

             tx.commit();

         }catch(Exception e){

             e.printStackTrace();

             tx.rollback();

         }finally{

             session.close();

             sessionFactory.close();

         }

     }

 }

MainFunc.java

最后，数据库中增加了t_teacher，t_student和中间表t_tea_stu

aaarticlea/png;base64,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" alt="" />

数据库内的数据为：

aaarticlea/png;base64,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" alt="" />aaarticlea/png;base64,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" alt="" width="159" height="219" />

完成了Hibernate的多对多的级联映射。

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