校园商铺-4店铺注册功能模块-8店铺注册之Controller层的改造
不合理的地方：
1. 并不需要将InputStream转换成File类型，直接将InputStream传进入交给CommonsMultipartfile去处理就可以了
如果做这样的转换，每次都需要生成一个空白的文件，然后还需要向文件中写入请求传送过来的文件流，这样不仅仅产生很多垃圾文件，同时有可能造成写入失败，抛出异常的风险，大大地加大了系统的不稳定性。2. 问题：一开始设计ShopService接口addShop方法的时候，第二个参数不早早设定为InputStream？
原因：体现实际的开发过程。实际的开发中，在设计Service层的时候，只是为了方便对Service层做UT的测试，并且尽快的实现功能，这时第一感觉想到了File。File能够直接读取路径来产生文件流，传入给实现类去做处理，并没有想到Controller层调用时有多么的不便利。 当编写Controller时就感觉MultipartHttpServletRequest->CommonsMultipartFile->File转换不合理的了，因此发现不合理的地方就需要去尽早的改动，因为越早地去做重构，后面维护的成本越低。- 修改接口
package com.csj2018.o2o.service;
import java.io.InputStream;
import com.csj2018.o2o.entity.Shop;
import com.csj2018.o2o.dto.ShopExecution;
public interface ShopService {
ShopExecution addShop(Shop shop,InputStream shopImgInputStream,String fileName);
}
2.修改实现类
package com.csj2018.o2o.service.impl;
import java.io.InputStream;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.exceptions.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 {
private Logger logger = LoggerFactory.getLogger(ShopServiceImpl.class);
@Autowired
private ShopDao shopDao;
@Override
@Transactional
public ShopExecution addShop(Shop shop,InputStream shopImgInputStream,String fileName) {
//控制判断，shop是不是包含必需的值
if(shop == null) {
logger.warn("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);
logger.warn("添加结果："+effectedNum+"shopId:"+shop.getShopId());
if(effectedNum <= 0) {
throw new ShopOperationException("店铺创建失败");
}else {
if(shopImgInputStream != null) {
//存储图片
try {
addShopImage(shop,shopImgInputStream,fileName);
}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, InputStream shopImg,String fileName) {
// 获取shop图片目录的相对路径
String dest = PathUtil.getShopImagePath(shop.getShopId());
String shopImgAddr = ImageUtil.generateThumbnail(shopImg, fileName,dest);
shop.setShopImg(shopImgAddr);
}
}
3. 修改工具类
package com.csj2018.o2o.util;
import java.io.File;
import java.io.InputStream;
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);
/**
* 将文件流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;
}
/**
* 根据输入流，处理缩略图，并返回新生成图片的相对路径
* @param thumbnailInputStream
* @param targetAddr
* @return
*/
public static String generateThumbnail(InputStream thumbnailInputStream,String fileName ,String targetAddr) {
String realFileName = getRandomFileName();
String extension = getFileExtension(fileName);
makeDirPath(targetAddr);
String relativeAddr = targetAddr + realFileName + extension;
logger.debug("current relativeAddr is:" + relativeAddr);
File dest = new File(PathUtil.getImgBasePath()+relativeAddr);
logger.debug("current complete addr is:" + PathUtil.getImgBasePath()+relativeAddr);
try {
Thumbnails.of(thumbnailInputStream).size(200,200).watermark(Positions.BOTTOM_RIGHT,ImageIO.read(new File(basePath+"/newwater.png")),0.8f)
.outputQuality(0.8f).toFile(dest);
}catch (IOException e) {
logger.error(e.toString());
e.printStackTrace();
}
return relativeAddr;
}
/**
* 创建目标路径所设计的目录，即/a/b/c/xxx.jpg
* 那么a b c 这三个文件夹都得自动创建
* @param targetAddr
*/
private static void makeDirPath(String targetAddr) {
String realFileParentPath = PathUtil.getImgBasePath()+targetAddr;
File dirPath = new File(realFileParentPath);
if(!dirPath.exists()) {
dirPath.mkdirs();//上级目录不存在，也一并创建，同mkdir -p
}
}
/**
* 获取输入文件流的扩展名
* @param thumbnail
* @return
*/
private static String getFileExtension(String fileName) {
//输入的图片，只需或获取最后一个 . 后面的字符即可
return fileName.substring(fileName.lastIndexOf("."));
}
/**
* 生成随机文件名，当前年月日时分秒+5位随机数
* @param args
* @throws Exception
*/
public static String getRandomFileName() {
//获取随机的5位数：10000-99999
int rannum = r.nextInt(89999)+10000;
String nowTimeStr = sDateFormat.format(new Date());
return nowTimeStr + rannum;
}
public static void main(String[] args) throws Exception {
Thumbnails.of(new File(basePath + "/water.png")).size(30, 30).toFile(new File(basePath + "/newwater.png"));
// Thumbnails.of(new File("/Users/chenshanju/Downloads/cat.jpg")).size(200, 200)
// .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "newwater.png")), 1.0f)
// .outputQuality(0.8).toFile("/Users/chenshanju/Downloads/newcat.jpg");
}
}
4. 修改测试用例
package com.csj2018.o2o.service;
import static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Date;
import org.junit.Ignore;
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;
import net.coobird.thumbnailator.Thumbnails;
public class ShopServiceTest extends BaseTest{
@Autowired
private ShopService shopService;
@Test
public void testAddShop() throws FileNotFoundException {
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4");
shop.setShopDesc("店铺描述4");
shop.setShopAddr("测试路4号1");
shop.setPhone("1234567892");
shop.setPriority(4);
shop.setCreateTime(new Date());
shop.setEnableStatus(ShopStateEnum.CHECK.getState());
shop.setAdvice("审核中");
File shopImg = new File("/Users/chenshanju/Downloads/cat.jpg");
InputStream is = new FileInputStream(shopImg);
ShopExecution se = shopService.addShop(shop, is,shopImg.getName());
assertEquals(ShopStateEnum.CHECK.getState(), se.getState());
}
}
