class 权限{
教师 js;
课程 kc;
}

------解决方案--------------------
session.createSQLQuery("select 课程表.课程名,教师表.姓名/部门 from 课程表,教师表,权限表 where 权限表.课程ID=课程表.课程ID and 权限表.教师ID=教师表.教师ID and 权限表.权限ID=?")


------解决方案--------------------
还不知道你要查什么。。。。。
课程表  Course
配置文件 course.xml
<hibernate-mapping package="com.po">
	<class name="Course" table="Course">
		<id name="id" column="id">
			<generator class="native" />
		</id>
		<property name="name"  />
	<set name="teachers"  table="course_teacher"  inverse="true">
           <key column="id"/>
       	<many-to-many column="teacherid"
           	class="Teacher"/>
       </set>
	</class>
</hibernate-mapping>
Course类
public class Course{
	private long id;
	private String name;
	private Set teachers;
}
教师表  Teacher
配置文件
<hibernate-mapping package="com.po">
	<class name="Teacher" table="Teacher">
		<id name="id" column="id">
			<generator class="native" />
		</id>
		<property name="name"  />
	<set name="courses"  table="course_teacher"  inverse="true">
           <key column="id"/>
       	<many-to-many column="courseid"
           	class="Course"/>
       </set>
	</class>
</hibernate-mapping>
教师类
public class Teacher{
	private long id;
	private String name;
	private Set courses;
}

权限表就不用写配置文件了，对应于配置文件中course_teacher关联表。
通过教师查课程， teacher.getCourses();
通过课程查教师， course.getTeacher();