Java代码示例：账号验证、默认值设置和邮箱数量限制

// Check if account already exists if (checkAccount(param.getAccount())) { throw new BizException('邮箱已存在'); }

// Set default value for thirdId if not provided if (param.getThirdId() == null) { param.setThirdId(1L); }

// Verify if user number has reached the limit if (verifyUserNumber(userDetail.getShopId())){ throw new WarnException('邮箱数量已经达到上限,如有需要请扩容'); }