图片没有发生改变

同学你好！

你代码中的路径是不是写错了呢，看你的图中Upload，一个大写一个小写。建议你将文件名字的首字母改成小写测试一下

祝学习愉快~

其他信息都能添加，但是我的文件下路径下并没有图片

同学你好！

根据你的报错信息是代码的第128行报错了

老师测试你的代码，发现你的用户名出的代码有误

由于此时没有登录功能，所以相应的用户应该咱们手动写一下

祝学习愉快~

严重: Servlet.service() for servlet [spring-dispatcher] in context with path [/oyuan] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

java.lang.NullPointerException

at com.imooc.oyuan.web.shopadmin.ShopManagementController.registerShop(ShopManagementController.java:128)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:567)

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:528)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.base/java.lang.Thread.run(Thread.java:835)

4月 28, 2020 3:59:07 下午 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet [spring-dispatcher] in context with path [/oyuan] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

java.lang.NullPointerException

at com.imooc.oyuan.web.shopadmin.ShopManagementController.registerShop(ShopManagementController.java:128)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:567)

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:528)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.base/java.lang.Thread.run(Thread.java:835)

同学你好！

你的意思是在页面修改时会出现问题吗？

你的js老师在本地又重新测试了一下，仍然是可以正常修改的。

会不会是同学的数据有问题呢？你可以检查一下在修改之前数据库中图片的地址，在相应的文件夹下是否存在。

也可以能是缓存导致的问题，建议重新编译一下项目，清除一下浏览器的缓存测试一下。

祝学习愉快~

老师您好，现在的问题是我在前端改不了图片

同学你好！

很理解你的心情，但是老师这里测试你的代码的确是没有问题的呢，所以要一步一步来查找问题呢

请问你的本地以下代码执行了吗？

在执行以下删除代码时，路径是否是图片的路径呢？

祝学习愉快~

在控制台确实生成了新的图片，但是去文件夹还是没有改变图片啊

我重新测试了ShopService

又重新生成了一个新的图片但是我想改变图片就是不成功

JS代码

$(function(){

var shopId = getQueryString('shopId');

var isEdit = shopId ? true : false;

var initUrl = '/oyuan/shopadmin/getshopinitinfo';

// 注册店铺的URL

var registerShopUrl ='/oyuan/shopadmin/registershop';

// 编辑店铺前需要获取店铺信息，这里为获取当前店铺信息的URL

var shopInfoUrl = "/oyuan/shopadmin/getshopbyid?shopId=" + shopId;

var editShopUrl = '/oyuan/shopadmin/modifyshop';

if(!isEdit){

getShopInitInfo();

}else{

getShopInfo(shopId);

}

function getShopInfo(shopId) {

$.getJSON(shopInfoUrl, function(data) {

if (data.success) {

// 若访问成功，则依据后台传递过来的店铺信息为表单元素赋值

var shop = data.shop;

$('#shop-name').val(shop.shopName);

$('#shop-addr').val(shop.shopAddr);

$('#shop-phone').val(shop.phone);

$('#shop-desc').val(shop.shopDesc);

// 给店铺类别选定原先的店铺类别值

var shopCategory = '<option data-id="'

+ shop.shopCategory.shopCategoryId + '" selected>'

+ shop.shopCategory.shopCategoryName + '</option>';

var tempAreaHtml = '';

// 初始化区域列表

data.areaList.map(function(item, index) {

tempAreaHtml += '<option data-id="' + item.areaId + '">'

+ item.areaName + '</option>';

});

$('#shop-category').html(shopCategory);

// 不允许选择店铺类别

$('#shop-category').attr('disabled', 'disabled');

$('#area').html(tempAreaHtml);

// 给店铺选定原先的所属的区域

$("#area option[data-id='" + shop.area.areaId + "']").attr(

"selected", "selected");

}

});

}

// 取得所有二级店铺类别以及区域信息，并分别赋值进类别列表以及区域列表

function getShopInitInfo(){

$.getJSON(initUrl,function(data){

if(data.success){

var tempHtml='';

var tempAreaHtml='';

data.shopCategoryList.map(function(item, index) {

tempHtml += '<option data-id="' + item.shopCategoryId

+ '">' + item.shopCategoryName + '</option>';

});

data.areaList.map(function(item, index) {

tempAreaHtml += '<option data-id="' + item.areaId + '">'

+ item.areaName + '</option>';

});

$('#shop-category').html(tempHtml);

$('#area').html(tempAreaHtml);

}

}); 

  }

$('#submit').click(function(){

var shop={};

if(isEdit){

shop.shopId=shopId;

}

shop.shopName=$('#shop-name').val();

shop.shopAddr=$('#shop-addr').val();

shop.phone=$('#shop-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')

};// 获取上传的图片文件流

var shopImg = $('#shop-img')[0].files[0];

// 生成表单对象，用于接收参数并传递给后台

var formData = new FormData();

// 添加图片流进表单对象里

formData.append('shopImg', shopImg);

// 将shop json对象转成字符流保存至表单对象key为shopStr的的键值对里

formData.append('shopStr', JSON.stringify(shop));

var verifyCodeActual = $('#j_captcha').val();

if (!verifyCodeActual) {

$.toast('请输入验证码！');

return;

}

formData.append('verifyCodeActual', verifyCodeActual);

// 将数据提交至后台处理相关操作

$.ajax({

url :(isEdit?editShopUrl: registerShopUrl),

type : 'POST',

data : formData,

contentType : false,

processData : false,

cache : false,

success : function(data) {

if (data.success) {

$.toast('提交成功！');

}else{

$.toast('提交失败！'+data.errMsg);

}

$('#captcha_img').click();

}

});

});

})

同学你好！

老师使用你的代码测试是没有任何问题的

同学打断点测试的时候，有在什么地方卡住吗？同学可以将自己测试的结果说明一下。

老师再帮同学排查一下问题。

祝学习愉快~

public class ImageUtil {

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

private static final SimpleDateFormat sDateFormat=new SimpleDateFormat("yyyMMddHHmmss");

private static final Random r= new Random();

private static Logger logger = LoggerFactory.getLogger(ImageUtil.class);

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;

}

public static String generateThumbnail(InputStream thumbnailInputStream,String fileName,String targetAddr) {

// 获取不重复的随机名

String realFileName = getRandomFileName();

// 获取文件的扩展名如png,jpg等

String extension = getFileExtension(fileName);

// 如果目标路径不存在，则自动创建

makeDirPath(targetAddr);

// 获取文件存储的相对路径(带文件名)

String relativeAddr = targetAddr + realFileName + extension;

logger.debug("current relativeAddr is :" + relativeAddr);

// 获取文件要保存到的目标路径

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 + "/watermark.jpg")), 0.25f)

.outputQuality(0.8f).toFile(dest);

} catch (IOException e) {

logger.error(e.toString());

                       e.printStackTrace();

}

return relativeAddr;

}

private static void makeDirPath(String targetAddr) {

// TODO Auto-generated method stub

String realFileParentPath = PathUtil.getImgBasePath() + targetAddr;

File dirPath = new File(realFileParentPath);

if (!dirPath.exists()) {

dirPath.mkdirs();

}

}

private static String getFileExtension(String fileName) {

// TODO Auto-generated method stub

   return fileName.substring(fileName.lastIndexOf("."));

}

public 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 {

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

Thumbnails.of(new File("/Intel/image/xiaogou.jpg")).size(200, 200).watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath+ "watermark.jpg")),

0.25f).outputQuality(0.8f).toFile("/Intel/image/xiaogounew.jpg");

}

/**

* storePath是文件的路径还是目录的路径， 如果storePath是文件路径则删除该文件，

* 如果storePath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);

if (fileOrPath.exists()) {

if (fileOrPath.isDirectory()) {

File files[] = fileOrPath.listFiles();

for (int i = 0; i < files.length; i++) {

files[i].delete();

}

}

fileOrPath.delete();

}

}

}

public class ShopServiceImpl implements ShopService {

@Autowired

private ShopDao shopDao;

@Transactional

public ShopExecution addShop(Shop shop, InputStream shopImgInputStream,String fileName) {

if (shop == null) {

            return new ShopExecution(ShopStateEnum.NULL_SHOP);

        }

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 (shopImgInputStream != null) {

                    // 存储图片

                    try {

                        addShopImg(shop, shopImgInputStream,fileName);

                    } catch (Exception e) {

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

                    }

                    // 更新店铺的图片地址

                    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, InputStream shopImgInputStream,String fileName) {

// TODO Auto-generated method stub

// 获取shop图片目录的相对值路径

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

        String shopImgAddr = ImageUtil.generateThumbnail(shopImgInputStream,fileName,dest);

        shop.setShopImg(shopImgAddr);

}

public Shop getByShopId(long shopId) {

return shopDao.queryByShopId(shopId);

}

public ShopExecution modifyShop(Shop shop, InputStream shopImgInputStream, String fileName)

throws ShopOperationException {

if (shop == null || shop.getShopId() == null) {

            return new ShopExecution(ShopStateEnum.NULL_SHOP);

        } else {

            // 1.判断是否需要处理图片

            try{

                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());

            }

        }

    }

}

@Controller

@RequestMapping("/shopadmin")

public class ShopManagementController {

@Autowired

private ShopService shopService;

@Autowired

private ShopCategoryService shopCategoryService;

  @Autowired

    private AreaService areaService;

  @RequestMapping(value = "/getshopbyid", method = RequestMethod.GET)

    @ResponseBody

    private Map<String, Object> getShopById(HttpServletRequest request) {

        Map<String, Object> modelMap = new HashMap<String, Object>();

        Long shopId = HttpServletRequestUtil.getLong(request, "shopId");

        if (shopId > -1) {

            try {

                Shop shop = shopService.getByShopId(shopId);

                List<Area> areaList = areaService.getAreaList();

                modelMap.put("shop", shop);

                modelMap.put("areaList", areaList);

                modelMap.put("success", true);

            } catch (Exception e) {

                modelMap.put("success", false);

                modelMap.put("errMsg", e.toString());

            }

        } else {

            modelMap.put("success", false);

            modelMap.put("errMsg", "empty shopId");

        }

        return modelMap;

    }

    @RequestMapping(value="/getshopinitinfo",method = RequestMethod.GET)

    @ResponseBody

    private Map<String,Object> getShopInitInfo(){

        Map<String, Object> modelMap = new HashMap<String, Object>();

        List<ShopCategory> shopCategoryList = new ArrayList<ShopCategory>();

        List<Area> areaList = new ArrayList<Area>();

        try {

            shopCategoryList = shopCategoryService.getShopCategoryList(new ShopCategory());

            areaList = areaService.getAreaList();

            modelMap.put("shopCategoryList", shopCategoryList);

            modelMap.put("areaList", areaList);

            modelMap.put("success", true);

        } catch (Exception e) {

            modelMap.put("success", false);

            modelMap.put("errMsg", e.getMessage());

        }

        return modelMap;

    }

@RequestMapping(value="/registershop",method=RequestMethod.POST)

@ResponseBody 

private Map<String, Object> registerShop(HttpServletRequest request){

  Map<String, Object> modelMap = new HashMap<String, Object>();

  if (!CodeUtil.checkVerifyCode(request)) {

            modelMap.put("success", false);

            modelMap.put("errMsg", "输入了错误的验证码");

            return modelMap;

        } 

//接受并转化相应的参数，包括店铺信息以及图片信息

  String shopStr=HttpServletRequestUtil.getString(request, "shopStr");

  ObjectMapper mapper=new ObjectMapper();

  Shop shop=null;

  try {

  shop=mapper.readValue(shopStr,Shop.class);

  }catch(Exception e){

  modelMap.put("success",false);

  modelMap.put("errMsg",e.getMessage());

  return modelMap;

  }

   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", "上传图片不能为空");

            return modelMap;

        }

//注册店铺

        if (shop != null && shopImg != null) {

            PersonInfo owner =(PersonInfo) request.getSession().getAttribute("user");

            shop.setOwner(owner);

            ShopExecution se;

try {

se = shopService.addShop(shop,shopImg.getInputStream(),shopImg.getOriginalFilename());

if(se.getState() == ShopStateEnum.CHECK.getState()){

                    modelMap.put("success",true);

                    @SuppressWarnings("unchecked")

List<Shop> shopList = (List<Shop>)request.getSession().getAttribute("shoplist");

                    if(shopList == null || shopList.size() == 0) {

                        shopList = new ArrayList<Shop>();

                    }

                    shopList.add(se.getShop());

                    request.getSession().setAttribute("shopList", shopList);

            }else {

            modelMap.put("success",false);

            modelMap.put("errMsg",se.getStateInfo());

            }

} catch (ShopOperationException e) {

  modelMap.put("success",false);

  modelMap.put("errMsg",e.getMessage());

} catch (IOException e) {

  modelMap.put("success",false);

  modelMap.put("errMsg",e.getMessage());

}

            return modelMap;

        }else {

        modelMap.put("success", false);

         modelMap.put("errMsg", "请输出店铺信息");

         return modelMap;

        }

}

@RequestMapping(value = "/modifyshop",method = RequestMethod.POST)

    @ResponseBody

    private Map<String, Object> modifyshop(HttpServletRequest request) {

        Map<String, Object> modelMap = new HashMap<String, Object>();

        if (!CodeUtil.checkVerifyCode(request)) {

            modelMap.put("success", false);

            modelMap.put("errMsg", "输入了错误的验证码");

            return modelMap;

        }

        // 1.接收并转化相应的参数，包括店铺信息以及图片信息

        String shopStr = HttpServletRequestUtil.getString(request, "shopStr");

        ObjectMapper mapper = new ObjectMapper();

        Shop shop = null;

        try {

            shop = mapper.readValue(shopStr, Shop.class);

        } catch (Exception e) {

            modelMap.put("success", false);

            modelMap.put("errMsg", e.getMessage());

            return modelMap;

        }

        CommonsMultipartFile shopImg = null;

        CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver(

                request.getSession().getServletContext());

        if (commonsMultipartResolver.isMultipart(request)) {

            MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;

            shopImg = (CommonsMultipartFile) multipartHttpServletRequest.getFile("shopImg");

        }

        // 2.修改店铺信息

        if (shop != null && shop.getShopId() != null) {

            ShopExecution se;

            try {

                if(shopImg == null){

                    se = shopService.modifyShop(shop, null, null);

                }else{

                    se = shopService.modifyShop(shop, shopImg.getInputStream(), shopImg.getOriginalFilename());

                }

                if(se.getState() == ShopStateEnum.SUCCESS.getState()){

                    modelMap.put("success",true);

                }else{

                    modelMap.put("success", false);

                    modelMap.put("errMsg", se.getStateInfo());

                }

            } catch (ShopOperationException e){

                modelMap.put("success", false);

                modelMap.put("errMsg", e.getMessage());

            } catch (IOException e) {

                modelMap.put("success", false);

                modelMap.put("errMsg", e.getMessage());

            }

            return modelMap;

        } else {

            modelMap.put("success", false);

            modelMap.put("errMsg", "请输入店铺Id");

            return modelMap;

        }

    }

/*

* private static void inputStreamToFile(InputStream ins,File file) {

* FileOutputStream os=null; try { os=new FileOutputStream(file); int

* bytesRead=0; byte[] buffer=new byte[1024];

* while((bytesRead=ins.read(buffer))!=-1) { os.write(buffer,0,bytesRead); }

* }catch(Exception e) { throw new

* RuntimeException("调用inputStreamToFile产生异常"+e.getMessage()); }finally { try {

* if(os!=null) { os.close(); } if(ins!=null) { ins.close(); }

* }catch(IOException e) { throw new

* RuntimeException("inputStreamToFile关闭io产生异常"+e.getMessage()); } } }

*/

}

同学你好！

1. 首先如果修改了图片，数据库中的图片路径会改变，相应的文件夹会新增新上传的图片，但是原来的图片是不会被删除的。

2. 如果你的图片没有改变，应该是你的关于图片的逻辑错误了，建议你打断点跟踪一个后台的数据，看一下图片上传那里出错了。

如果不能找到问题可以继续提问

祝学习愉快~