Question

我正在尝试使用Apache POI来阅读Excel，它在Karaf中作为bundle部署。

按订单使用的POI版本：

poi-3.11.jar
poi-ooxml-3.11.jar
POI-OOXML-架构 - 3.11.jar

feature.xml片段（用于包装Karaf中的包）：

<bundle>wrap:mvn:org.apache.poi/poi/3.11</bundle>
<bundle>wrap:mvn:org.apache.poi/poi-ooxml/3.11</bundle>
<bundle>wrap:mvn:org.apache.poi/poi-ooxml-schemas/3.11</bundle>

pom.xml（依赖jars）

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.11<version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.11<version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>3.11</version>
</dependency>

以上jar用作项目中的依赖项以及Karaf中的bundle。

尝试了servicemix版本的POI。但它也无济于事。

我理解NoClassDefFoundError是运行时错误，这是在运行时找不到类时引起的。请给我解决这个问题。

堆栈追踪：

java.lang.NoClassDefFoundError: org/apache/poi/POIXMLDocument
    at java.lang.ClassLoader.defineClass1(Native Method)[:1.8.0_25]
    at java.lang.ClassLoader.defineClass(Unknown Source)[:1.8.0_25]
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.findClass(BundleWiringImpl.java:2128)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1432)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:72)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1843)
    at java.lang.ClassLoader.loadClass(Unknown Source)[:1.8.0_25]
    at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1317)
    at org.apache.felix.framework.BundleWiringImpl.searchImports(BundleWiringImpl.java:1481)
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1427)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:72)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1843)
    at java.lang.ClassLoader.loadClass(Unknown Source)[:1.8.0_25]

Answer 1

我曾在一个使用servicemix bundle而非直接使用POI的项目中工作过。

<bundle>mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.poi/3.15_1</bundle>

java.lang.NoClassDefFoundError：org / apache / poi / POIXMLDocument

1 个答案: