6-2 店铺信息编辑之Service层的实现

最新推荐文章于 2022-11-13 16:31:57 发布

原创最新推荐文章于 2022-11-13 16:31:57 发布 · 316 阅读

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本文详细介绍了如何通过修改特定接口来实现店铺信息的获取与更新，并深入探讨了图片处理功能，包括图片更新流程和异常处理策略。文章还提供了具体的代码实现示例，以及如何在测试环境中验证修改功能的有效性。

1、修改接口

public interface ShopService {
	/**
	 * 通过店铺ID获取店铺信息
	 * @param shopId
	 * @return
	 */
	Shop getByShopId(long shopId);
	/**
	 * 更新店铺信息，包括图片处理
	 * @param shop
	 * @param shopImgInputStream
	 * @param fileName
	 * @return
	 * @throws ShopOperationException
	 */
	ShopExecution modifyShop(Shop shop,InputStream shopImgInputStream,String fileName) throws ShopOperationException
}

2、接口实现类

    @Override
	public Shop getByShopId(long shopId) {
		return shopDao.queryByShopId(shopId);
	}

	@Override
	public ShopExecution modifyShop(Shop shop, InputStream shopImgInputStream, String fileName)
			throws ShopOperationException {

		if (shop == null || shop.getShopId() == null) {
			return new ShopExecution(ShopStateEnum.NULL_SHOP);
		} else {
			try {
				// 1、判断是否需要处理图片,图片不为空则删除原来的图片
				if (shopImgInputStream != null && fileName != null && !"".equals(fileName)) {
					Shop tempShop = shopDao.queryByShopId(shop.getShopId());
					if (tempShop.getShopImg() != null) {
						ImageUtil.deleteFileOrPath(tempShop.getShopImg());
					}
					addShopImg(shop, shopImgInputStream, fileName);
				}
				// 2、更新店铺信息
				shop.setLastEditTime(new Date());
				int effectedNum = shopDao.updateShop(shop);
				if (effectedNum <= 0) {
					return new ShopExecution(ShopStateEnum.INNER_ERROR);
				} else {
					shop = shopDao.queryByShopId(shop.getShopId());
					return new ShopExecution(ShopStateEnum.SUCCESS, shop);
				}
			} catch (Exception e) {
				throw new ShopOperationException("modifyShop error:" + e.getMessage());
			}
		}

	}

注意：判断String是不是空的写法

3、删除图片的工具类方法

/**
	 * storePath是文件路径还是目录路径
	 * 如果是文件路径，则删除该文件
	 * 如果是目录路径，则删除该目录下的所有文件
	 * @param storePath
	 */
	public static void deleteFileOrPath(String storePath) {
		File fileOrPath = new File(PathUtil.getImgBasePath() + storePath);//全路径
		if(fileOrPath.exists()) {
			if(fileOrPath.isDirectory()) {
				File files[] = fileOrPath.listFiles();
				for(int i = 0; i < files.length; i++) {
					files[i].delete();
				}
			}
			fileOrPath.delete();
		}
	}

4、测试类

@Test
	public void testModifyShop() throws ShopOperationException,FileNotFoundException{
		Shop shop = new Shop();
		shop.setShopId(29L);
		shop.setShopName("修改后的店铺名称211");
		shop.setShopAddr("修改后的地址211");
		File shopImg = new File("/Users/shawn/Document/实战练习/image/dabai.jpg");
		InputStream is = new FileInputStream(shopImg);
		ShopExecution shopExecution = shopService.modifyShop(shop, is, "dabai.jpg");
		System.out.println("新的图片地址为：" + shopExecution.getShop().getShopImg());
	}