Struts2上传文件时错误

最新推荐文章于 2019-04-18 21:34:00 发布

转载最新推荐文章于 2019-04-18 21:34:00 发布 · 840 阅读

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本文解决了Struts2中使用common-fileupload-1.0.jar导致的文件上传问题，建议使用1.1.1版本。文章还列出了Struts2文件上传所需的主要jar包。

1/文件上传：
Servlet.service() for servlet default threw exception
java.lang.RuntimeException: Unable to load bean org.apache.struts2.dispatcher.multipart.MultiPartRequest (jakarta) - [unknown location]
    at com.opensymphony.xwork2.inject.ContainerBuilder$4.create(ContainerBuilder.java:136)
    at com.opensymphony.xwork2.inject.ContainerImpl.getInstance(ContainerImpl.java:476)
    at com.opensymphony.xwork2.inject.ContainerImpl.getInstance(ContainerImpl.java:486)
    at com.opensymphony.xwork2.inject.ContainerImpl$9.call(ContainerImpl.java:517)
    at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:542)
    at com.opensymphony.xwork2.inject.ContainerImpl.getInstance(ContainerImpl.java:515)
    at org.apache.struts2.dispatcher.Dispatcher.wrapRequest(Dispatcher.java:697)
    at org.apache.struts2.dispatcher.FilterDispatcher.prepareDispatcherAndWrapRequest(FilterDispatcher.java:330)
    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:390)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Thread.java:595)
Caused by: Unable to load bean org.apache.struts2.dispatcher.multipart.MultiPartRequest (jakarta) - [unknown location]
    at org.apache.struts2.config.BeanSelectionProvider$ObjectFactoryDelegateFactory.create(BeanSelectionProvider.java:246)
    at com.opensymphony.xwork2.inject.ContainerBuilder$4.create(ContainerBuilder.java:134)
    ... 22 more
[by Baidu]
如果上传使用的包有问题可能导致上传出现：Unable to load bean org.apache.struts2.dispatcher.multipart.MultiPartRequest 这样的问题。其实这是common-fileuplod.jar包的问题。如果你使用common-fileuplod.jar（1.0版本），哈哈，那恭喜你，你可能会遇到上面的问题，但是如果你使用common-fileuplod-1.1.1.jar版本则可以正常处理。我没有时间去研究两者之间的差别，看了一下两个包的大小，相差了10k，说明差别还不小小。目前在struts2.0的发行包中的showcase例子中有上传的例子，里边提供了common-fileupload-1.1.1.jar包，直接使用就好，我刚开始也不知道从那儿找的一个1.0的包，害我折腾半天，有兴趣的朋友可以看看两者之间的差异了。