實體類：

public class Department implements Serializable {
    private Integer id;
    private String name;    private Set<Department> childDept;
    private Department parentDept;
    public Department getParentDept() {
        return parentDept;
}

    public void setParentDept(Department parentDept) {
        this
 
.parentDept = parentDept;
}

    public Set<Department> getChildDept() {
        return childDept;
}

    public void setChildDept(Set<Department> childDept) {
        this.childDept = childDept;
}

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
 
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

<resultMap id="BaseResultMap" type="com.xxx.Department" >
  <id column="id" property="id" jdbcType="INTEGER" />
  <result column="name" property="name" jdbcType="VARCHAR" 
 
/><association property="parentDept" column="parent_id" select="selectParent" javaType="com.ininwork.inin.po.rights.Department"></association>
  <collection property="childDept" ofType="com.xxx.Department" select="selectChildren" column="id"></collection>
</resultMap>