1.有实体类Student
public class Student {
//id为主键
private String id;
private String passwd;
private String name;
private String sex;
private String school;
private String major;
private String stuClass;
//省略了无参构造,getter/setter等方法
2.有实体类Subject
public class Subject {
//id为主键
private Integer id;
private Exam exam;
private String question;
private String answer;
private int score;
//省略了无参构造,getter/setter等方法
3.有实体类AnswerSubject
public class AnswerExam {
//使用Sstudent的id和Subject的id作为联合主键
private Student student;
private Subject subject;
private String stuAnswer;
///省略了无参构造,getter/setter等方法
4.请问,在AnswerSubject.hbm.xml该怎么配置联合主键?已知知识如下:
<!-- 配置联合主键 -->
<composite-id name="id">
<key-property name="student"
type="com.abc.entities.Student">
<column name="STUDENT" not-null="true">
</column>
</key-property>
<key-property name="subject"
type="com.abc.entities.Subject">
<column name="SUBJECT" not-null="true">
</column>
</key-property>
</composite-id>
<property name="stuAnswer" type="java.lang.String">
<column name="STUANSWER" />
</property>
</class>