跟单向关联仅有几处不同：
1从多的一方加入新的属性
package com.cnblogs.hibernate_first;public class Student { ???private int id; ???private String name; ???????private Classes classes; ???public Classes getClasses() { ???????return classes; ???} ???public void setClasses(Classes classes) { ???????this.classes = classes; ???} ???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; ???}}2修改xml文件.Classes.hbm.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC ???????"-//Hibernate/Hibernate Mapping DTD 3.0//EN" ???????"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="com.cnblogs.hibernate_first"> ???<class name="Classes" table="t_classes"> ???????<id name="id" column="t_id"> ???????????<generator class="native"></generator> ???????</id> ???????<property name="name" column="t_name" length="30"/> ???????<!-- 将set student加入inverse 属性设为true ，则表示该字段放弃对多的一方的管理，表示从一的一方添加失效 --> ???????<set name="students" inverse="true"> ???????????<key column="classesid"></key> ???????????<one-to-many class="com.cnblogs.hibernate_first.Student"/> ???????</set> ???</class></hibernate-mapping>
3,修改Student.hbm.xml文件
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC ???????"-//Hibernate/Hibernate Mapping DTD 3.0//EN" ???????"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="com.cnblogs.hibernate_first"> ???<class name="Student" table="t_student"> ???????<id name="id" column="t_id"> ???????????<generator class="native"></generator> ???????</id> ???????<property name="name" column="t_name" length="30"/> ???????<many-to-one name="classes" column="classesid"></many-to-one> ???</class></hibernate-mapping>
hibernate one2many (双向关联)
原文地址：http://www.cnblogs.com/Juli/p/7743954.html