Spring MVC中的java.lang.NoClassDefFoundError:org/apache/commons/fileupload/FileItemFactory [英] java.lang.NoClassDefFoundError:org/apache/commons/fileupload/FileItemFactoryin Spring MVC

问题描述

我正在尝试构建一个具有文件上传功能的简单Spring MVC Web App.出现以下错误:

I am trying to build a simple Spring MVC Web App with the functionality of file uploading.I got following error:

java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory

快速搜索后，所有答案都指向缺少依赖项，但在我看来，这并非事实:

After a quick search,all answers pointed to the missing of dependencies,but it seems not to be true in my case:

我在pom.xml中包含了以下代码:

I have included the following code in pom.xml:

<dependencies> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> </dependencies> 将commons.io-2.4.jar和commons.fileupload-1.3.1.jar添加到lib文件夹中.

<dependencies> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> </dependencies> with commons.io-2.4.jar and commons.fileupload-1.3.1.jar added into lib folder.

我发现的一件有趣的事是，每当删除代码时:

One interesting thing I found was that whenever I deleted the code:

   <bean id="multipartResolver"
      class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize">
        <value>10000000</value>
    </property>
    <property name="maxInMemorySize">
        <value>10000000</value>
    </property>
  </bean>

该网络应用正常运行(当然，我也删除了用于文件上传的表格.)

the web app works fine(of course I removed the form for file uploading as well. )

推荐答案

如果您访问Maven 中央存储库，并且输入搜索词:

If you visit the Maven Central Repository and enter the search term:

fc:org.apache.commons.fileupload.FileItemFactory

然后将列出每个包含该类的可用工件.

then every released artifact available containing that class will be listed.

您会在该列表中找到commons-upload 1.3.1.

You will find commons-upload 1.3.1 in that list.

因此，您需要仔细检查部署，以确保存在jar.

Therefore you need to double check your deployment to ensure that jar is present.

提示:使用fc:在Maven Central中找到包含特定类的jar.

Tip: Use fc: to locate jars in Maven Central that contain a specific class.

这篇关于Spring MVC中的java.lang.NoClassDefFoundError:org/apache/commons/fileupload/FileItemFactory的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！