获取错误缺少运行时依赖项:java.lang.NoClassDefFoundError:org/apache/commons/fileupload/FileItem

Question

我正在尝试设置Maven,JSF和Primefaces项目.但是,当我运行该项目时,我得到以下错误

com.sun.faces.config.ConfigurationException: 
Source Document: jar:file:/D:/Personal%20Work/eclipse%2032%20Bit/workspace/Java%20EE
/Spring/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps
/ch18_SpringWebFlowAndJSF/WEB-INF/lib/primefaces-3.5.jar!/META-INF/faces-config.xml
Cause: Class 'org.primefaces.component.fileupload.FileUploadRenderer' is missing
 a runtime dependency: java.lang.NoClassDefFoundError: org/apache/commons/fileupload
/FileItem

这是我的POM片段

<properties>
    <java-version>1.6</java-version>
    <org.springframework-version>3.2.3.RELEASE</org.springframework-version>
    <org.aspectj-version>1.6.10</org.aspectj-version>
    <org.slf4j-version>1.7.5</org.slf4j-version>
    <jsf-version>2.2.0</jsf-version>
</properties>

    <dependency>
        <groupId>org.springframework.webflow</groupId>
        <artifactId>spring-faces</artifactId>
        <version>2.3.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>${jsf-version}</version>
    </dependency>

    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>${jsf-version}</version>
    </dependency>

    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>3.5</version>
    </dependency>
</dependencies>

<repositories>
    <repository>  
        <id>prime-repo</id>  
        <name>PrimeFaces Maven Repository</name>  
        <url>http://repository.primefaces.org</url>  
        <layout>default</layout>  
    </repository>     
</repositories> 

为什么我收到此错误？

谢谢

Answer 1

java doc说

NoClassDefFoundError如果Java虚拟机或ClassLoader实例尝试加载类的定义(作为普通方法调用的一部分或作为使用新表达式创建新实例的一部分),则抛出该类,并且无法找到该类的定义.

搜索的类定义在编译当前正在执行的类时存在,但无法再找到该定义.

org.apache.commons.fileupload.FileItem是Apache Commons的FileUpload组件中的一个类,它在类路径中缺失.在pom.xml中为FileUpload组件添加以下maven依赖项.

 <dependency>   
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>     
    <version>x.x</version>
 </dependency>

你也可以查看BalusC的这个答案,