关于 hibernate 双向一对多的数据保存

考虑到中间表要插入数据 所以不用many-to-many 转换成了双向一对多

一方Athletes类

    public class Athletes {

    private int athletesId;

    private String  athletesName;

    private String athletesClass;

    private String athletesSex;

    private Set<Enroll> enrolls=new HashSet<Enroll>();

    //getter setter

  一方Item类

    public class Item {

    private int itemId;

    private String itemName;

    private String itemType;

    private String itemNature;

    private Set<Enroll> enrolls=new HashSet<Enroll>();

    //getter setter

多方Enroll类(中间表)

    public class Enroll {

    private int enroll_id;

    private int enroll_state;

    private Item item;

    private Athletes athletes;

    //getter setter

  Athletes类mapping(省略其他属性配置)

     <set name="enrolls" table="enroll_info" inverse="true" lazy="true" cascade="all-delete-orphan" fetch="select">

    <key column="athletesId"/>

<one-to-many class="com.ssy.entity.Enroll"/></set>

  Item类mapping(省略其他属性配置)

 <set name="enrolls" table="enroll_info"  inverse="true" lazy="true"cascade="all-delete-orphan" fetch="select">

     <key column="itemId"/>

     <one-to-many class="com.ssy.entity.Enroll"/></set>

 Enroll类mapping(省略其他属性配置)

<many-to-one name="athletes" class="com.ssy.entity.Athletes"  column="athletesId" lazy="false" cascade="all"/>

<many-to-one name="item" class="com.ssy.entity.Item"  column="itemId" lazy="false" cascade="all"/>