Hibernate学习笔记---------------多对多关系

多对多关系，如：老师有多个学生，学生有多个老师的关系；

 

Teacher.hbm.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 package="com.xx.domain"> <class name="Teacher" table="t_teacher"> <id name="id"> <generator class="native"/> </id> <property name="name"/> <!-- 从中间表student_teacher通过外键teacherid查找sutdentid，根据studentid查找sudent --> <!-- teacher——（通过teacherid）——》student_teacher——（通过studentid）——》student --> <set name="students" table="student_teacher"> <key column="teacherid"/> <many-to-many class="Student" column="studentid"/> </set> </class> </hibernate-mapping>

 

Student.hbm.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 package="com.xx.domain"> <class name="Student" table="t_student"> <id name="id"> <generator class="native"/> </id> <property name="name"/> <set name="teachers" table="student_teacher"> <key column="studentid"/> <many-to-many class="Teacher" column="teacherid"/> </set> </class> </hibernate-mapping>