校园商铺-4店铺注册功能模块-5店铺注册之Service层的实现

1. 创建接口

ShopService.java

package com.csj2018.o2o.service;

import java.io.File;

import com.csj2018.o2o.entity.Shop;

import com.csj2018.o2o.dto.ShopExecution;

public interface ShopService {

	ShopExecution addShop(Shop shop,File shopImg);

}

2. 创建店铺操作异常类

为什么会用RuntimeException，而不是Exception呢？

当我们的程序仅当跑出RuntimeException或者继承RuntimeException的异常类时，事物才得以终止并回滚。如果是Exception，事物就无法终止和回滚
```#java
package com.csj2018.o2o.exceptions;

public class ShopOperationException extends RuntimeException{

/**

*

*/

private static final long serialVersionUID = -4379928435508967105L;

public ShopOperationException(String msg) {

super(msg);

}

}

##    3. 创建接口的实现类

```#java

package com.csj2018.o2o.service.impl;

import java.io.File;

import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Transactional;

import com.csj2018.o2o.dao.ShopDao;

import com.csj2018.o2o.dto.ShopExecution;

import com.csj2018.o2o.entity.Shop;

import com.csj2018.o2o.enums.ShopStateEnum;

import com.csj2018.o2o.execptions.ShopOperationException;

import com.csj2018.o2o.service.ShopService;

import com.csj2018.o2o.util.ImageUtil;

import com.csj2018.o2o.util.PathUtil;

@Service

public class ShopServiceImpl implements ShopService {

	@Autowired

	private ShopDao shopDao;

	@Override

	@Transactional

	public ShopExecution addShop(Shop shop,File shopImg) {

		//控制判断，shop是不是包含必须的一些值

		if(shop == null) {

			return new ShopExecution(ShopStateEnum.NUll_SHOP);

		}

		//增加对Shop其他引入类非空的判断

		try {

			//给店铺信息赋初始值

			shop.setEnableStatus(0);

			shop.setCreateTime(new Date());

			shop.setLastEditTime(new Date());

			//添加店铺信息

			int effectedNum = shopDao.insertShop(shop);

			if(effectedNum <= 0) {

				throw new ShopOperationException("店铺创建失败");

			}else {

				if(shopImg != null) {

					//存储图片

					try {

						addShopImage(shop,shopImg);

					}catch (Exception e) {

						throw new ShopOperationException("addShopImg error:"+e.getMessage());

					}

					//更新店铺的图片信息

					effectedNum = shopDao.updateShop(shop);

					if(effectedNum <= 0) {

						throw new ShopOperationException("更新图片地址失败");

					}

				}

			}

		}catch(Exception e) {

			throw new ShopOperationException("addShop error:"+e.getMessage());

		}

		return new ShopExecution(ShopStateEnum.CHECK,shop);

	}

	private void addShopImage(Shop shop, File shopImg) {

		// 获取shop图片目录的相对路径

		String dest = PathUtil.getShopImagePath(shop.getShopId());

		String shopImgAddr = ImageUtil.generateThumbnail(shopImg, dest);

		shop.setShopImg(shopImgAddr);

	}

}

4. 创建单元测试类

package com.csj2018.o2o.service;

import static org.junit.Assert.assertEquals;

import java.io.File;

import java.util.Date;

import org.junit.Test;

import org.springframework.beans.factory.annotation.Autowired;

import com.csj2018.o2o.BaseTest;

import com.csj2018.o2o.dto.ShopExecution;

import com.csj2018.o2o.entity.Area;

import com.csj2018.o2o.entity.PersonInfo;

import com.csj2018.o2o.entity.Shop;

import com.csj2018.o2o.entity.ShopCategory;

import com.csj2018.o2o.enums.ShopStateEnum;

public class ShopServiceTest extends BaseTest{

	@Autowired

	private ShopService shopService;

	@Test

	public void testAddShop() {

		Shop shop = new Shop();

		PersonInfo owner = new PersonInfo();

		Area area = new Area();

		ShopCategory shopCategory = new ShopCategory();

		owner.setUserId(1L);

		area.setAreaId(2);

		shopCategory.setShopCategoryId(1L);

		shop.setOwner(owner);

		shop.setArea(area);

		shop.setShopCategory(shopCategory);

		shop.setShopName("测试de店铺1");

		shop.setShopDesc("店铺描述1");

		shop.setShopAddr("测试路1号1");

		shop.setPhone("1234567891");

		shop.setPriority(5);

		shop.setCreateTime(new Date());

		shop.setEnableStatus(ShopStateEnum.CHECK.getState());

		shop.setAdvice("审核中");

		File shopImg = new File("/Users/chenshanju/Downloads/cat.jpg");

		ShopExecution se = shopService.addShop(shop, shopImg);

		assertEquals(ShopStateEnum.CHECK.getState(), se.getState());

	}

}

## 5. 总结
* 1.需要将店铺的信息插入到数据库当中
* 2.返回店铺的id
* 3.通过店铺id去创建出存储图片的文件夹，在文件夹下处理图片
* 4.在把文件夹的地址更新到数据里面去

巴特西

校园商铺-4店铺注册功能模块-5店铺注册之Service层的实现

1. 创建接口

2. 创建店铺操作异常类

4. 创建单元测试类

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