【公共规范】对于出错信息，要进行详细说明

对于出错信息要进行详细的说明（安全/隐私信息除外），说明为什么错了，而不只是说出错了。

举例：

if (checkOrderQuantityParam.getOrderQuantity() + totalCount > checkOrderQuantityParam.getLimitQuantity()) {
    throw new CheckException("当前商品购买数量超过限购数量");
}

详细：

final int orderQuantity = checkOrderQuantityParam.getOrderQuantity();
final int limitQuantity = checkOrderQuantityParam.getLimitQuantity();
final int purchase = orderQuantity + totalCount;

if (purchase > limitQuantity)) {
    throw new CheckException("当前商品购买总数（" + purchase + "。其中已购买" + totalCount + "，当前下单" + orderQuantity + "）超过限购数量
}

再详细：

final int orderQuantity = checkOrderQuantityParam.getOrderQuantity();
final int limitQuantity = checkOrderQuantityParam.getLimitQuantity();
final int purchase = orderQuantity + totalCount;

if (purchase > limitQuantity)) {
    throw new CheckException(String.format("当前商品购买总数（$d。其中已购买%d，当前下单%d）超过限购数量（%d)", purchase, totalCount, order
}