// 废弃
 @Override
 public void save(EmployeeModel model) {
   String pass = model.getUserPass();
   model.setUserPass(MD5Utils.md5(pass));
   employeeDao.save(model);
 }
 @Override
 public Boolean changePass(String userName, String userPass, String newPass) {
   newPass = MD5Utils.md5(newPass);
   userPass = MD5Utils.md5(userPass);
   return employeeDao.changePass(userName, userPass, newPass);
 }