商铺项目（店铺注册功能模块（二））

package com.ouyan.o2o.dto;

import java.util.List;

import com.ouyan.o2o.entity.Shop;
import com.ouyan.o2o.enums.ShopStateEnum;

/**
 * 封装执行后结果
 */
public class ShopExecution {

    // 结果状态
    private int state;

    // 状态标识
    private String stateInfo;

    // 店铺数量
    private int count;

    // 操作的shop（增删改店铺的时候用）
    private Shop shop;

    // 获取的shop列表(查询店铺列表的时候用)
    private List<Shop> shopList;

    public ShopExecution() {
    }

    // 失败的构造器
    public ShopExecution(ShopStateEnum stateEnum) {
        this.state = stateEnum.getState();
        this.stateInfo = stateEnum.getStateInfo();
    }

    // 成功的构造器
    public ShopExecution(ShopStateEnum stateEnum, Shop shop) {
        this.state = stateEnum.getState();
        this.stateInfo = stateEnum.getStateInfo();
        this.shop = shop;
    }

    // 成功的构造器
    public ShopExecution(ShopStateEnum stateEnum, List<Shop> shopList) {
        this.state = stateEnum.getState();
        this.stateInfo = stateEnum.getStateInfo();
        this.shopList = shopList;
    }

    public int getState() {
        return state;
    }

    public void setState(int state) {
        this.state = state;
    }

    public String getStateInfo() {
        return stateInfo;
    }

    public void setStateInfo(String stateInfo) {
        this.stateInfo = stateInfo;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public Shop getShop() {
        return shop;
    }

    public void setShop(Shop shop) {
        this.shop = shop;
    }

    public List<Shop> getShopList() {
        return shopList;
    }

    public void setShopList(List<Shop> shopList) {
        this.shopList = shopList;
    }

}

package com.ouyan.o2o.enums;

/**
 * 使用枚举表述常量数据字典
 */
public enum ShopStateEnum {

    CHECK(0, "审核中"), OFFLINE(-1, "非法商铺"), SUCCESS(1, "操作成功"), PASS(2, "通过认证"), INNER_ERROR(
            -1001, "操作失败"), NULL_SHOPID(-1002, "ShopId为空"), NULL_SHOP_INFO(
            -1003, "传入了空的信息");

    private int state;

    private String stateInfo;

    private ShopStateEnum(int state, String stateInfo) {
        this.state = state;
        this.stateInfo = stateInfo;
    }

    public int getState() {
        return state;
    }

    public String getStateInfo() {
        return stateInfo;
    }

    public static ShopStateEnum stateOf(int index) {
        for (ShopStateEnum state : values()) {
            if (state.getState() == index) {
                return state;
            }
        }
        return null;
    }

}

接下来咱们来实现service层（要注意只有抛出RuntimeException或者继承RuntimeException的异常时，事务才会终止）：

package com.ouyan.o2o.exceptions;

public class ShopOperationException extends RuntimeException{
    /**
     * 
     */
    private static final long serialVersionUID = -2174235994752246501L;

    public ShopOperationException(String msg){
        super(msg);
    }
}

package com.ouyan.o2o.service;

import java.io.File;

import com.ouyan.o2o.dto.ShopExecution;
import com.ouyan.o2o.entity.Shop;

public interface ShopService {
    ShopExecution addShop(Shop shop,File shopImg);
}

package com.ouyan.o2o.service.impl;

import java.io.File;
import java.util.Date;

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

import com.ouyan.o2o.dao.ShopDao;
import com.ouyan.o2o.dto.ShopExecution;
import com.ouyan.o2o.entity.Shop;
import com.ouyan.o2o.enums.ShopStateEnum;
import com.ouyan.o2o.exceptions.ShopOperationException;
import com.ouyan.o2o.service.ShopService;
import com.ouyan.o2o.util.PathUtil;
import com.ouyan.o2o.util.imageUtil;
@ServiceImpl
public class ShopServiceImpl implements ShopService{
    @Autowired
    private ShopDao shopDao;
    
    @Override
    @Transactional
    public ShopExecution addShop(Shop shop, File shopImg) {
        //空值判断
        if(shop==null){
            return new ShopExecution(ShopStateEnum.NULL_SHOP_INFO);
        }
        try {
            //给店铺信息赋值初始值
            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 {
                        addShopImg(shop,shopImg);
                    } catch (Exception e) {
                        throw new ShopOperationException("addShopImg error:"+e.getMessage());
                    }
                    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 addShopImg(Shop shop, File shopImg) {
        //获取shop图片的相对路径
        String dest = PathUtil.getShopImagePath(shop.getShopId());
        String shopImgAddr = imageUtil.generateThumbnail(shopImg, dest);
        shop.setShopImg(shopImgAddr);
    }
}

package com.ouyan.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 org.springframework.stereotype.Service;

import com.ouyan.o2o.BaseTest;
import com.ouyan.o2o.dto.ShopExecution;
import com.ouyan.o2o.entity.Area;
import com.ouyan.o2o.entity.PersonInfo;
import com.ouyan.o2o.entity.Shop;
import com.ouyan.o2o.entity.ShopCategory;
import com.ouyan.o2o.enums.ShopStateEnum;
@Service
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(2L);
        shopCategory.setShopCategoryId(33L);
        shop.setOwner(owner);
        shop.setArea(area);
        shop.setShopCategory(shopCategory);
        shop.setShopName("测试的店铺1");
        shop.setShopDesc("test1");
        shop.setShopAddr("test1");
        shop.setPhone("test1");
        shop.setCreateTime(new Date());
        shop.setEnableStatus(ShopStateEnum.CHECK.getState());
        shop.setAdvice("审核中");
        File shopImg = new File("d:/timg.jpg");
        ShopExecution se = shopService.addShop(shop, shopImg);
        assertEquals(ShopStateEnum.CHECK.getState(),se.getState());
    }
}

 然后我们需要把jpg文件放置在该目录下：

因为输出文件的原因：

接着测试，成功。

 在这里我发现当src/test/resources目录下没有该jpg文件时，运行报错，但是仍然成功的插入数据库了，什么原因？我dubug以后发现ShopServiceImpl这个类里并没有捕捉到异常，于是我做出如下调整，让generateThumbnail方法抛出异常，而不处理异常，然后addShopImg也抛出异常，让addShop方法捕捉到：

package com.ouyan.o2o.util;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import javax.imageio.ImageIO;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import net.coobird.thumbnailator.Thumbnails;
import net.coobird.thumbnailator.geometry.Positions;

public class imageUtil {
    private static String basePath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
    private static final SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
    private static final Random r = new Random();
    private static Logger logger = LoggerFactory.getLogger(imageUtil.class);

    /**
     * 将CommonsMultipartFile转换成file
     * 
     * @param cFile
     * @return
     */
    public static File transferCommonsMultipartFileToFile(CommonsMultipartFile cFile) {
        File newFile = new File(cFile.getOriginalFilename());
        try {
            cFile.transferTo(newFile);
        } catch (IllegalStateException e) {
            logger.error(e.toString());
            e.printStackTrace();
        } catch (IOException e) {
            logger.error(e.toString());
            e.printStackTrace();
        }
        return newFile;
    }

    /**
     * 处理缩略图并返回新生成图片的相对值路径
     * 
     * @param thumbnail
     * @param targetAddr
     * @return
     * @throws IOException 
     */
    public static String generateThumbnail(File thumbnail, String targetAddr) throws IOException {
        String realFileName = getRandomFileName();
        String extension = getFileExtesion(thumbnail);
        makeDirPath(targetAddr);
        String relativeAddr = targetAddr + realFileName + extension;
        logger.error("current relativeAddr is:" + relativeAddr);
        File dest = new File(PathUtil.getImgBasePath() + relativeAddr);
        logger.debug("current complete addr is :" + PathUtil.getImgBasePath() + relativeAddr);
        Thumbnails.of(thumbnail).size(200, 200)
                .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "/watermark.jpg")), 0.25f)
                .outputQuality(0.8).toFile(dest);
        return relativeAddr;
    }

    /**
     * 创建目标路径涉及的目录
     * 
     * @param targetAddr
     */
    private static void makeDirPath(String targetAddr) {
        String realFileParentPath = PathUtil.getImgBasePath() + targetAddr;
        File dirPath = new File(realFileParentPath);
        if (!dirPath.exists()) {
            dirPath.mkdirs();
        }
    }

    /**
     * 获取输入文件的扩展名
     * 
     * @param thumbnail
     * @return
     */
    private static String getFileExtesion(File cFile) {
        String originalFilename = cFile.getName();
        return originalFilename.substring(originalFilename.lastIndexOf("."));
    }

    /**
     * 生成随机文件名，当前年月是小时分钟秒钟+五位随机数
     * 
     * @return
     */
    private static String getRandomFileName() {
        // 获取随机的五位数
        int rannum = r.nextInt(89999) + 10000;
        String nowTimeStr = sDateFormat.format(new Date());
        return nowTimeStr + rannum;
    }

    public static void main(String[] args) throws IOException {
        Thumbnails.of(new File("d:\timg.jpg")).size(2000, 2000)
                .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "/watermark.jpg")), 0.25f)
                .outputQuality(0.8f).toFile("d:\timgnew.jpg");
    }
}

package com.ouyan.o2o.service.impl;

import java.io.File;
import java.io.IOException;
import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.ouyan.o2o.dao.ShopDao;
import com.ouyan.o2o.dto.ShopExecution;
import com.ouyan.o2o.entity.Shop;
import com.ouyan.o2o.enums.ShopStateEnum;
import com.ouyan.o2o.exceptions.ShopOperationException;
import com.ouyan.o2o.service.ShopService;
import com.ouyan.o2o.util.PathUtil;
import com.ouyan.o2o.util.imageUtil;
@Service
public class ShopServiceImpl implements ShopService{
    @Autowired
    private ShopDao shopDao;
    
    @Override
    @Transactional
    public ShopExecution addShop(Shop shop, File shopImg) {
        //空值判断
        if(shop==null){
            return new ShopExecution(ShopStateEnum.NULL_SHOP_INFO);
        }
        try {
            //给店铺信息赋值初始值
            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 {
                        addShopImg(shop,shopImg);
                    } catch (Exception e) {
                        throw new ShopOperationException("addShopImg error:"+e.getMessage());
                    }
                    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 addShopImg(Shop shop, File shopImg) throws IOException {
        //获取shop图片的相对路径
        String dest = PathUtil.getShopImagePath(shop.getShopId());
        String shopImgAddr = imageUtil.generateThumbnail(shopImg, dest);
        shop.setShopImg(shopImgAddr);
    }
}

然后才测试成功。这里大家也需要注意，涉及到被事务调用的方法，不能自己捕捉，而要往上抛。