Collection type Mappings

1. Set unordered elements are not repeatable
   1. 　　

      1  Public class Studentset {2     Private int ID; 3     Private String name; 4     Private New Hashset<string> ();

      1 <?XML version= "1.0"?>2 <!DOCTYPE hibernate-mapping Public3 "-//hibernate/hibernate Mapping DTD 3.0//en"4 "Http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">5 6 <hibernate-mapping Package= "Com.base.model">7 8     <classname= "Studentset"Table= "T_studentset">    <!--the class name and the corresponding data table name -9         <IDname= "id"column= "Stuid">            <!--field name, setting primary key -Ten             <Generatorclass= "Native"/>             One         </ID> A         < Propertyname= "Name"column= "Stuname"/>            <!--normal field - -          -         <Setname= "Images"Table= "T_image">        <!--A new table was created - the             <Keycolumn= "StudentID"></Key>         -             <elementcolumn= "ImageName"type= "string"></element> -         </Set> -     </class> +  - </hibernate-mapping>

2. List ordered elements can be repeated
   2. One more list-index column relative to set, you can find

   3. 1  　　　    <Listname= "Images"Table= "T_imagelist">        <!--A new table was created -2             <Keycolumn= "StudentID"></Key>//FOREIGN key3             <List-indexcolumn= "ImageIndex"></List-index>//Primary key4             <elementcolumn= "ImageName"type= "string"></element>5         </List>

3. Bag unordered elements can be duplicated
   2. Ibag tags using the list property

   3. 1 <Idbagname= "Images"Table= "T_images">2     <Collection-idtype= "int"column= "Imagesid">//Primary key3         <Generatorclass= "Increment"/>//Build Policy4     </Collection-id>5     <Keycolumn= "StudentID"></Key>//FOREIGN key6     <elementcolumn= "ImageName"type= "string"></element>7 </Idbag>

4. Map Key value pairs
   2. Federated primary Key

   3. 1 <Mapname= "Students"Table= "Student">  2        <Keycolumn= "team_id"></Key>  3        <Map-keycolumn= "Name"type= "Java.lang.String"></Map-key>4        <elementcolumn= "description"type= "string"></element>5 </Map>  6   

Collection type Mappings