在人力资源树当中,上级对下级员工信息查看修改操作。
人力资源
在一个树型结构当中,存在对下属员工进行操作,如修改员工的信息等.
员工表字段 EmployeeId PerantId LoginName Name ...
例如
A ——————————————————————1
A_1 ————————————————————2
A_2
A_3
A_3_1 —————————————————3
A_3_2
A_3_3
A_3_4
A_4(B)
A_4_1(C)
A_4_1_1( D) ———————————4
A_4_1_1_1(E) ———————5
A_4_2
A_4_3
A_4_4
。。。。
现在 A 有权力下面所有人进行修查看操作。
而 A_4 的权限只能查看,他下面员工的信息,不能查看A_3、A_2、A_1 的信息及他们各自的下属的信息。
现在 B 员工要对 E 员工进行修改,可是数据库里又没对 B 员工修改下面员工 E 的权限。
如果对 B 进行权限设置,他就得对它下面所有每个员工进行权限分配,这样的话权限表就会非常大了。
最底一层(N)就可以有N-1个人有对他修改的权限,这样不好。
如果要 E 的内容可以由 D、C、B、A 这些人才可以修改,其他人就不行了
要实现 B 有没有对 E 员工进行修改的权限,由两种法子(我认为)
第一就是通过算法,把 B 下属员工全部取出来,然后看 E 在没有在里头。
第二就是通过算法,我把有修改 E 用户信息的员工取一个,跟 B 进行比较是不是到了
如果没有再从 E 的上级的上级取出来跟 B 进行比较,依此类推如果没有 B 的话,它最多取 N-1 次结束。
我个人认为第二种要比第一种好得好。
下面我就把实现第二种的代码如下
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我只想到这种法子,第一种的实现我觉得好难,写不出来。
我想一定还会有再好的算法。