Hibernate Learning 7-hibernate Mapping inheritance

Requirements: Students have a lot of photos, divided into pictures and work photos;

Section one: Each specific class corresponds to a table

Student.java:

 PackageCom.cy.model;ImportJava.util.Set; Public classStudent {Private intID; PrivateString name; PrivateSet<image>images;  Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicSet<image>getimages () {returnimages; }     Public voidSetImages (set<image>images) {         This. Images =images; }            }

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Abstract class Image.java:

 PackageCom.cy.model; Public Abstract classImage {Private intID; PrivateString ImageName; PrivateStudent Student;  Public intgetId () {returnID; }     Public voidSetId (intID) { This. ID =ID; }     PublicString Getimagename () {returnImageName; }     Public voidsetimagename (String imageName) { This. ImageName =ImageName; }     PublicStudent getstudent () {returnstudent; }     Public voidsetstudent (Student Student) { This. Student =student; }        }

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Pictures Lifeimage.java:

 Package Com.cy.model;  Public class extends image{}

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Work Photo Workimage.java:

 Package Com.cy.model;  Public class extends image{}

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Student.hbm.xml:

package = "Com.cy.model" >    <class name= "Student" table= "t_student" >        <id name= " ID "column=" stuid ">            class=" Native "></generator>        </id>        <property name=" Name "column=" Stuname "></property>    </class>
LifeImage.hbm.xml:
<hibernate-mapping Package= "Com.cy.model">    <classname= "Lifeimage"Table= "T_lifeimage">        <IDname= "id"column= "Lifeimageid">            <Generatorclass= "Native"></Generator>        </ID>        < Propertyname= "ImageName"column= "ImageName"></ Property>                <Many-to-onename= "Student"column= "Stuid"class= "Com.cy.model.Student"></Many-to-one>    </class></hibernate-mapping>
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WorkImage.hbm.xml:
<hibernate-mapping Package= "Com.cy.model">    <classname= "Workimage"Table= "T_workimage">        <IDname= "id"column= "Workimageid">            <Generatorclass= "Native"></Generator>        </ID>        < Propertyname= "ImageName"column= "ImageName"></ Property>                <Many-to-onename= "Student"column= "Stuid"class= "Com.cy.model.Student"></Many-to-one>    </class></hibernate-mapping>
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Test Code Studenttest.java:
@Test Public voidtestgetallimages () {List<Image> imageList =NewArraylist<image>(); intStuid = 1; List<Image> lifeimagelist = (list<image>) session.createquery ("from lifeimage l where l.student.id =" +stuid). List ();        Imagelist.addall (lifeimagelist); List<Image> workimagelist = (list<image>) session.createquery ("from Workimage w where w.student.id =" +stuid). List ();        Imagelist.addall (workimagelist);  for(Image image:imagelist) {System.out.println (Image.getimagename ()); }            }
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Association relationships for three tables:
T_lifeimage Table Structure:
T_lifeimage Table Data:
T_workimage Table Data:
Section Two: The root class corresponds to a table
Hibernate Learning 7-hibernate Mapping inheritance