根据部门ID构造从此部门一直到最顶层部门的字符串

应用场景:当需构造根据部门ID构造从此部门一直到最顶层部门的字符串时,如:XXX股份有限公司->XXX热电厂->运行分场->一厂->一厂运行三值->一厂汽机三班,此时传入此方法的是"一厂汽机三班"对应的DEPID,则返回此构造好的字符串,不过得保证最顶级部门的PID为NULL或为"".

public String findFullPathDepNameByDepid(String depid) {
		log.debug("finding SysDepartment fullPathDepName by property depid: "	+ depid);
		StringBuffer fullName = new StringBuffer();
		if (depid != null && !depid.equals("")) {
			try {
				do {//开始循环构造字符串
					fullName.insert(0, findDepNameByDepid(depid) + "->");
					depid = findPardepidByDepid(depid);//将上一部门的PID作为ID继续循环
				} while ((depid != null) && (!depid.equals("")));//直至PID为NULL或为""
			} catch (RuntimeException re) {
				log.error("finding SysDepartment fullPathDepName by property depid  failed",re);
				throw re;
			}
		}
		return fullName.toString().substring(0,fullName.toString().length() - 2);//将最后一个"->"去掉
	}