Hibernate 映射問題，要多少分都可以

User類:

package?com.test.model;

import?java.sql.Date;

public?class?User?{

protected?String?id;

protected?String?username;

protected?String?password;

protected?String?realName;

protected?Date?birth;

protected?Date?regTime;

setter&&getter

}

Student類:

package?com.test.model;

import?java.util.HashSet;

import?java.util.Set;

public?class?Student?extends?User?{

private?String?studentNo;

private?String?major;

private?Set<Course>?courses?=?new?HashSet<Course>();

setter&&getter

}

Teacher類:

package?com.test.model;

public?class?Teacher?extends?User?{

private?String?teacherNo;

private?String?specialty;

private?Course?course;

setter&&getter

}

Course類:

package?com.test.model;

import?java.util.HashSet;

import?java.util.Set;

public?class?Course?{

private?String?id;

private?String?description;

private?String?courseName;

private?Set<Student>?students?=?new?HashSet<Student>();

private?Teacher?teacher;

setter&&getter

}

User.hbm.xml映射文件:

<?xml?version="1.0"?encoding="ISO-8859-1"?>

<!DOCTYPE?hibernate-mapping?PUBLIC?"-//Hibernate/Hibernate?Mapping?DTD?3.0//EN"?".test.model.User"?table="user">

<id?name="id">

<generator?class="uuid"/>

</id>

<property?name="username"?length="16"?not-null="true"></property>

<property?name="password"?length="16"?not-null="true"></property>

<property?name="realName"?length="16"?not-null="true"></property>

<property?name="birth"?not-null="true"></property>

<property?name="regTime"?not-null="true"></property>

<joined-subclass?name="com.test.model.Teacher"?table="teacher">

<key?column="teacherNo"></key>

<property?name="specialty"?length="20"></property>

<one-to-one?name="course"></one-to-one>

</joined-subclass>

<joined-subclass?name="com.test.model.Student"?table="student">

<key?column="studentNo"></key>

<property?name="major"?length="20"></property>

<set?name="courses"?table="student_course">

<key?column="studentNo"></key>

<many-to-many?class="com.test.model.Course"?column="courseId"></many-to-many>

</set>

</joined-subclass>

<joined-subclass?name="com.test.model.Administrator"?table="administrator">

<key?column="id"></key>

</joined-subclass>

</class>

</hibernate-mapping>

Course.hbm.xml映射文件:

<?xml?version="1.0"?encoding="ISO-8859-1"?>

<!DOCTYPE?hibernate-mapping?PUBLIC?"-//Hibernate/Hibernate?Mapping?DTD?3.0//EN"?".test.model.Course"?table="course">

<id?name="id">

<generator?class="foreign">

<param?name="property">teacher</param>

</generator?>

</id>

<property?name="description"?length="100"?not-null="true"></property>

<property?name="courseName"?length="16"?not-null="true"></property>

<set?name="students"?table="student_course">

<key?column="courseId"></key>

<many-to-many?class="com.test.model.Student"?column="studentNo"></many-to-many>

</set>

<one-to-one?name="teacher"?constrained="true"></one-to-one>

</class>

</hibernate-mapping>

Student---Course:?many-to-many

Teacher--Course:one-to-one主鍵關聯

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