Question

当我从数据库获取实体并修改它时，我有一个简单的场景。

我不知道哪些字段正在被修改，所以我只是从db获取当前实体并通过新的DTO（newModifiedUserDTO）设置所有值。

代码变得杂乱，丑陋和漫长。

也许你可以建议我（使用java 8的lambda或任何其他技术如何使这段代码更短更有效？

 @Transactional
@Override
    public void modifyUserEntity(UserEntityDTO newModifiedUserDTO) {
        UserEntity oldUserEntity = usersRepository.findByUsername(newModifiedUserDTO.getUsername());

        oldUserEntity.getExternalUsersEntity().setFirstName(newModifiedUserDTO.getExternalUsersEntity().getFirstName());
        oldUserEntity.getExternalUsersEntity().setLastName(newModifiedUserDTO.getExternalUsersEntity().getLastName());
        oldUserEntity.getExternalUsersEntity().setEnteredCompany(newModifiedUserDTO.getExternalUsersEntity().getEnteredCompany());
        oldUserEntity.getExternalUsersEntity().setCountry(newModifiedUserDTO.getExternalUsersEntity().getCountry());
        oldUserEntity.getExternalUsersEntity().setState(newModifiedUserDTO.getExternalUsersEntity().getState());
        oldUserEntity.getExternalUsersEntity().setCity(newModifiedUserDTO.getExternalUsersEntity().getCity());
        oldUserEntity.getExternalUsersEntity().setAddress1(newModifiedUserDTO.getExternalUsersEntity().getAddress1());
        oldUserEntity.getExternalUsersEntity().setAddress2(newModifiedUserDTO.getExternalUsersEntity().getAddress2());
        oldUserEntity.getExternalUsersEntity().setZipCode(newModifiedUserDTO.getExternalUsersEntity().getZipCode());
        oldUserEntity.getExternalUsersEntity().setTelephone(newModifiedUserDTO.getExternalUsersEntity().getTelephone());
        oldUserEntity.getExternalUsersEntity().setFax(newModifiedUserDTO.getExternalUsersEntity().getFax());
        oldUserEntity.getExternalUsersEntity().setShippingCountry(newModifiedUserDTO.getExternalUsersEntity().getShippingCountry());
        oldUserEntity.getExternalUsersEntity().setShippingState(newModifiedUserDTO.getExternalUsersEntity().getShippingState());
        oldUserEntity.getExternalUsersEntity().setShippingCity(newModifiedUserDTO.getExternalUsersEntity().getShippingCity());
        oldUserEntity.getExternalUsersEntity().setShippingZip(newModifiedUserDTO.getExternalUsersEntity().getShippingZip());
        oldUserEntity.getExternalUsersEntity().setShippingTelephone(newModifiedUserDTO.getExternalUsersEntity().getShippingTelephone());
        oldUserEntity.getExternalUsersEntity().setShippingFax(newModifiedUserDTO.getExternalUsersEntity().getShippingFax());
        oldUserEntity.getExternalUsersEntity().setShippingAddress1(newModifiedUserDTO.getExternalUsersEntity().getShippingAddress1());
        oldUserEntity.getExternalUsersEntity().setShippingAddress2(newModifiedUserDTO.getExternalUsersEntity().getShippingAddress2());
        oldUserEntity.getExternalUsersEntity().setWorkspace(newModifiedUserDTO.getExternalUsersEntity().getWorkspace());
        oldUserEntity.setModifyDate(CisUtils.getCurrentDate());

    }

根据一些建议我尝试使用Spring utils：

 copyProperties(newModifiedUserDTO.getExternalUsersEntity(), modifiedUserEntity.getExternalUsersEntity(), "firstName", "lastName", "enteredCompany",
            "country", "state", "address1", "address2", "zipCode","telephone","fax","shippingCountry","shippingCity","shippingZip","shippingTelephone","shippingFax","shippingAddress1",
            "shippingAddress2","workspace");

但由于某种原因，更改未反映在数据库中（使用hibernate）

任何想法？

谢谢，射线。

Answer 1

检查Apache BeanUtils。它具有copyProperties()方法，可以将所有值从一个对象复制到另一个对象。 Spring框架中也有类似的方法（相同的类，同名）;后者允许指定属性而不是来复制可能有用的属性。

如何有效地修改Hibernate实体（使用Java8 lambda或其他任何东西）

1 个答案: