常见的工具类

1.对象映射，spring的copyProperties

public CrmBuySellPO convert(TrustBuyOrSellReq req) {
    CrmBuySellPO crmBuySellPO = new CrmBuySellPO();
    BeanUtils.copyProperties(req, crmBuySellPO);
    return crmBuySellPO;
}