com.opensymphony.xwork2.util.finder.UrlSet.includeClassesUrl :java.lang.NoSuchMethodError

Question

当我使用tomcat7进行部署时，我得到了以下异常。我使用netbeans7.4进行开发。我已经包含了struts2.3.15 jar文件和hibernet文件。

SEVERE: Exception starting filter struts2
    java.lang.NoSuchMethodError: com.opensymphony.xwork2.util.finder.UrlSet.includeClassesUrl(Lcom/opensymphony/xwork2/util/finder/ClassLoaderInterface;Lcom/opensymphony/xwork2/util/finder/UrlSet$FileProtocolNormalizer;)Lcom/opensymphony/xwork2/util/finder/UrlSet;
        at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildUrlSet(PackageBasedActionConfigBuilder.java:442)
        at org.apache.struts2.convention.PackageBasedActionConfigBuilder.readUrls(PackageBasedActionConfigBuilder.java:410)
        at org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:389)
        at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:347)
        at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53)
        at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:215)
        at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
        at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446)
        at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490)
        at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
        at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
        at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)
        at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)
        at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
        at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4746)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5399)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:656)
        at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1635)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)

如何解决这个问题。

Answer 1

java.lang.NoSuchMethodError:

如果应用程序尝试调用类(静态或实例)的指定方法，但该类不再具有该方法的定义，则会引发错误。

通常，编译器会捕获此错误；如果类的定义发生了不兼容的更改，则只有在运行时才会发生此错误。

尝试download最新版本的jar文件

Answer 2

当包含的jars中的方法存在冲突，或者可能是由于包含的依赖jars的不同版本时，通常会抛出NoSuchMethodError:。尝试删除不必要的jars，如果问题仍未解决，请检查包含的jars的版本