上传图片大致处理包含工具类

快来打我* 2022-02-27 14:40 265阅读 0赞

private static String  basePath   =  Thread.currentThread().getContextClassLoader().getResource("").getPath();

这句话basePath等同于resources下的路径。

需要用到的坐标：

<dependency>  
            <groupId>net.coobird</groupId>  
            <artifactId>thumbnailator</artifactId>  
            <version>0.4.8</version>  
</dependency>

<dependency>  
            <groupId>commons-fileupload</groupId>  
            <artifactId>commons-fileupload</artifactId>  
            <version>1.3.2</version>  
 </dependency>

\----

在spring-web.xml中设置上传文件解析器（不设置request得不到值）

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    		<property name="defaultEncoding" value="utf-8"></property>
    		<property name="maxUploadSize" value="20971520"></property>
    		<property name="maxInMemorySize" value="20971520"></property>
    </bean>

页面的js：

$(function(){
    	
    	
    	var registerShopUrl = '/o2o/shopadmin/registerShop';
    		
    		//点击注册：
    		$("#submit").click(function(){
    			
    			var  shop  ={};
    			shop.shopName =$('#shop-name').val();
    			shop.shopAddr =$('#shop-addr').val();
    			shop.phone=$('#phone').val();
    			shop.shopDesc=$('#shop-desc').val();
    			shop.shopCategory={
    					shopCategoryId:$('#shop-category').find('option').not(function(){
    						return !this.selected;
    					}).data('id')
    			};
    			shop.area={
    					areaId:$('#area').find('option').not(function(){
    						return !this.selected;
    					}).data('id')
    					
    			};
    			var shopImg =$('#shop-img')[0].files[0];
    			var verifyCode = $('#j_captcha').val();  //
    			if(verifyCode==''){
    				$.toast('请输入验证码');
    				return;
    			}
    			var formData=new FormData();
    			formData.append('verifyCode',verifyCode);
    			formData.append('shopImg',shopImg);
    			formData.append('shopStr',JSON.stringify(shop));  //js对象转换为json
    			$.ajax({
    				url : registerShopUrl,
    				type:'POST',
    				data:formData,
    				contentType:false,
    				processData:false,
    				cache:false,
    				success:function(data){
    					if(data.success){
    						$.toast("提交注册成功!");
    					}else{
    						$.toast("提交失败！"+data.errMsg);
    					}
    					$('#captcha_img').click();
    				}
    			});
    		});
    		
    		
    	}
    	
    	
    
    	
    });

后台代码：

@RequestMapping(value = "/registerShop", method = RequestMethod.POST)
    	@ResponseBody
    	private Map<String, Object> registerShop(HttpServletRequest request) {
    		
    		Map<String, Object> modelMap = new HashMap<String, Object>();
    		// i接受参数并转化为相应的参数，包括店铺信息 和店铺图片
    
    		if (!CodeUtil.checkVerifyCode(request)) {
    			modelMap.put("success", false);
    			modelMap.put("errMsg", "你的验证码错误  ！看仔细一点嘛瓜皮");
    			return modelMap;
    
    		}
    
    		String shopStr = HttpServletRequestUtil.getString(request, "shopStr");
    		ObjectMapper obejctMapper = new ObjectMapper();
    		Shop shop = null;
    		try {
    
    			shop = obejctMapper.readValue(shopStr, Shop.class);
    
    		} catch (Exception e) {
    			e.printStackTrace();
    			modelMap.put("success", false);
    			modelMap.put("errMsg", e.getMessage());
    			return modelMap;
    
    		}
    		// 处理图片相关
    		CommonsMultipartFile shopImg = null;
    		CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver(
    				request.getSession().getServletContext());
    		if (commonsMultipartResolver.isMultipart(request)) {
    			MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;
    			shopImg = (CommonsMultipartFile) multipartHttpServletRequest.getFile("shopImg");
    
    		} else {
    			modelMap.put("success", false);
    			modelMap.put("errMsg", "上传的图片不能为空");
    			return modelMap;
    		}
    
    		// ii注册店铺
    		if (shop != null && shopImg != null) {
    			PersonInfo owner = new PersonInfo();
    			owner.setUserId(1l);
    			// Session TODO
    			shop.setOwner(owner);
    
    			// 保存数据库
    			ShopExecution se;
    			try {
    				se = shopService.addShop(shop, shopImg.getInputStream(), shopImg.getOriginalFilename());
    				if (se.getState() == ShopStateEnum.CHECK.getState()) {
    					modelMap.put("success", true);
    
    				} else {
    					modelMap.put("success", false);
    					modelMap.put("errMsg", se.getStateInfo());
    				}
    
    			} catch (ShopOperationExcetion e) {
    				modelMap.put("success", false);
    				modelMap.put("errMsg", e.getMessage());
    			} catch (IOException e) {
    				modelMap.put("success", false);
    				modelMap.put("errMsg", e.getMessage());
    			}
    
    		} else {
    			modelMap.put("success", false);
    			modelMap.put("errMsg", "请输入店铺信息");
    			return modelMap;
    		}
    		return modelMap;
    	}

@Override
    	@Transactional
    	public ShopExecution addShop(Shop shop, InputStream shopImgInputStream,String fileName) {
    		
    		if(shop == null ){
    			return new ShopExecution(ShopStateEnum.NULL_SHOP);
    		}
    		try {
    			shop.setCreateTime(new Date());
    			shop.setLastEditTime(new Date());
    			shop.setEnableStatus(0);  //0:未通过审核
    			int effectedNum = shopDao.insertShop(shop);
    			if(effectedNum<=0){
    				throw new ShopOperationExcetion("店铺创建失败");
    			}else{
    				if(shopImgInputStream!=null){
    					try {
    						//存图片
    						addShopImg(shop,shopImgInputStream,fileName);
    					} catch (Exception e) {
    						throw new ShopOperationExcetion("addShopImg error"+e.getMessage());
    					}
    					
    					//更新shop库的图片地址
    					effectedNum = shopDao.updateShop(shop);
    					if(effectedNum<=0){
    						throw new ShopOperationExcetion("更新图片地址失败");
    					}
    					
    					
    				}
    			}
    			
    			 
    		} catch (Exception e) {
    			throw new ShopOperationExcetion("addShop error："+e.getMessage());
    			
    		}
    		
    		return new ShopExecution(ShopStateEnum.CHECK,shop);
    	}

private void addShopImg(Shop shop, InputStream shopImgInputStream,String fileName) {
    	
    		
    		String dest = PathUtil.setShopImagePath(shop.getShopId());	//设置并且获取shop图片目录的相对值路径
    		String shopImgAddr = ImageUtil.generateThumBnail(shopImgInputStream, fileName,dest);  //返回的是相对路径
    		shop.setShopImg(shopImgAddr);
    		
    }

/**
    	 * 图片的相对路径
    	 * @param shopId
    	 * @return
    	 */
    	public static String setShopImagePath(long shopId){
    		String path  ="/update/item/shop/"+shopId+"/";
    		
    		String returnPath =path.replace("/", separator) ;
    		return returnPath; 
    	}

public class ImageUtil {
    	private static String  basePath   =  Thread.currentThread().getContextClassLoader().getResource("").getPath();
    	
    	private static final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
    	private static final Random random = new Random();
    	private static Logger logger   =LoggerFactory.getLogger(ImageUtil.class);
    	/**
    	 * CommonsMultipartFile  转换为 File
    	 * @param CommonsMultipartFile cFile
    	 * @return  newFile
    	 */
    	public static  File transferCommonsMultipartFileToFile(CommonsMultipartFile cFile){
    		File newFile = new File(cFile.getOriginalFilename());
    		try {
    			cFile.transferTo(newFile);
    		} catch (IllegalStateException | IOException e) {
    			logger.error(e.toString());
    			e.printStackTrace();
    		}
    		
    		return newFile;
    		
    		
    	}
    	/**
    	 * 处理缩略图，并返回新生成的图片的相对路径 。
    	 * @param thumBnail  输入的File
    	 * @param targetAddr  设置的图片相对位置
    	 * @return
    	 */
    	public static String generateThumBnail(InputStream thumBnail, String fileName,String targetAddr) {
    		String randomFileName = getRandFileName();
    		String extension = getFileExtenSion(fileName);
    		makeDirPath(targetAddr);
    		//得到相对路径
    		String relativeFileAddr = targetAddr + randomFileName + extension;
    		logger.debug("相对路径:"+relativeFileAddr);
    		logger.debug("绝对路径"+PathUtil.getBasePath()+relativeFileAddr);
    		//创建并压缩这里是绝对路径
    		File dest = new File(PathUtil.getBasePath() + relativeFileAddr);
    		
    		try {
    			Thumbnails.of(thumBnail).size(200, 200).watermark(Positions.BOTTOM_RIGHT,
    					ImageIO.read(new File(basePath + "/watermark.jpg")), 0.25f).outputQuality(0.8f).toFile(dest);
    			
    
    		} catch (IOException e) {
    			// TODO: handle exception
    			logger.error(e.toString());
    			e.printStackTrace();
    		}
    	
    		return relativeFileAddr;
    
    	}
    
    	/**
    	 * 创建目标路径所涉及到的目录。
    	 * 
    	 * @param targetAddr
    	 */
    	private static void makeDirPath(String targetAddr) {
    		// TODO Auto-generated method stub
    		String realFilePath = PathUtil.getBasePath() + targetAddr;
    		File file = new File(realFilePath);
    		if (!file.exists()) {
    			file.mkdirs();
    		}
    	}
    
    	/**
    	 * 获得输入流的文件扩展名
    	 * 
    	 * @param thumBnail
    	 * @return
    	 */
    	private static String getFileExtenSion(String thumBnail) {
    		// TODO Auto-generated method stub
    
    		return thumBnail.substring(thumBnail.lastIndexOf("."));
    
    	}
    
    	/**
    	 * 生成一个随机的年月日时分秒+五位的随机数
    	 * 
    	 * @return
    	 */
    	@Test
    	public static String getRandFileName() {
    		// TODO Auto-generated method stub
    		String nowTimeStr = simpleDateFormat.format(new Date());
    		int randomStr = random.nextInt(89999) + 10000; // 10000-99999 随机的五位数字
    		return nowTimeStr + randomStr;
    
    	}
    	/**
    	 * storePath 如果是目录的话 则删除这个目录下面的所有的文件 
    	 * storePath 如果是文件的话 则删除这个文件。
    	 * @param shopImg
    	 */
    	public static void deleteFileOrPath(String storePath) {
    			File fileOrPath   = new File(PathUtil.getBasePath()+storePath);
    			if(fileOrPath.isDirectory()){ //判断是否为文件夹
    				File[] listFiles = fileOrPath.listFiles();
    				for (int i = 0; i < listFiles.length; i++) {
    					listFiles[i].delete();
    				}
    			}
    			fileOrPath.delete();
    			
    		
    	}
    
    }

public class PathUtil {
    	private static String separator = System.getProperty("file.separator");
    
    	/**
    	 * 取出的时候 用到的绝对路径
    	 * @return
    	 */
    	public static String getBasePath(){
    		String system = System.getProperty("os.name");
    		String path = "";
    		if(system.toLowerCase().startsWith("win")){
    			 path="D:/ssm_boot_Project/picture";
    			 
    		}else{
    			path="/home/xiangze/image/";
    		}
    		
    		 path  =path.replace("/",separator);
    		return  path ;
    	} 
    	
    	/**
    	 * 图片的相对路径
    	 * @param shopId
    	 * @return
    	 */
    	public static String setShopImagePath(long shopId){
    		String path  ="/update/item/shop/"+shopId+"/";
    		
    		String returnPath =path.replace("/", separator) ;
    		return returnPath; 
    	}