JavaStruts1.3.10摘要。getParser（）不支持操作异常

Question

我正在尝试启动Struts 1。使用OC4J版本10.1.3.5的X（版本1.3.10）应用程序。应用程序设法初始化所有Springbean，包括ActionServlet中定义的Struts操作。xml。然而，一旦初始化了所有bean，我就会在日志中看到一个相当丑陋的异常

我怀疑xalan（2.7.1）、xercesImpl（2.9.1）或XMLAPI（1.3.04）中存在问题，但所有这些都使用最新版本。例外情况是可能缺少依赖项，但我无法确定它可能是什么

感谢您的帮助。（注意：目前无法更新到Struts 2.X。该应用程序是一个可能会被替换的遗留应用程序）

 Digester.getParser:                                                                             08:18:10,794 ERROR Digester(789)
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
    at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:390)
    at org.apache.commons.digester.Digester.getFactory(Digester.java:534)
    at org.apache.commons.digester.Digester.getParser(Digester.java:786)
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.initPreloadServlets(HttpApplication.java:5118)
    at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1283)
    at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
    at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
    at com.evermind.server.Application.getHttpApplication(Application.java:592)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
    at com.evermind.server.http.HttpSite.initApplications(HttpSite.java:701)
    at com.evermind.server.http.HttpSite.setConfig(HttpSite.java:308)
    at com.evermind.server.http.HttpServer.setSites(HttpServer.java:280)
    at com.evermind.server.http.HttpServer.setConfig(HttpServer.java:180)
    at com.evermind.server.ApplicationServer.initializeHttp(ApplicationServer.java:2541)
    at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:1058)
    at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:131)
    at java.lang.Thread.run(Thread.java:595)
Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable.  Most likely, this is due to an incorrect or missing library dependency. 08:18:10,802 ERROR ActionServlet(398)
java.lang.NullPointerException
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.initPreloadServlets(HttpApplication.java:5118)
    at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1283)
    at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
    at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
    at com.evermind.server.Application.getHttpApplication(Application.java:592)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
    at com.evermind.server.http.HttpSite.initApplications(HttpSite.java:701)
    at com.evermind.server.http.HttpSite.setConfig(HttpSite.java:308)
    at com.evermind.server.http.HttpServer.setSites(HttpServer.java:280)
    at com.evermind.server.http.HttpServer.setConfig(HttpServer.java:180)
    at com.evermind.server.ApplicationServer.initializeHttp(ApplicationServer.java:2541)
    at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:1058)
    at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:131)
    at java.lang.Thread.run(Thread.java:595)
Digester.getParser:                                                                             08:18:20,228 ERROR Digester(789)
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
    at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:390)
    at org.apache.commons.digester.Digester.getFactory(Digester.java:534)
    at org.apache.commons.digester.Digester.getParser(Digester.java:786)
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:3139)
    at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:775)
    at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
    at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:226)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:127)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:116)
    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
    at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)
    at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)
    at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)
    at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
    at java.lang.Thread.run(Thread.java:595)
Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable.  Most likely, this is due to an incorrect or missing library dependency. 08:18:20,231 ERROR ActionServlet(398)
java.lang.NullPointerException
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:3139)
    at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:775)
    at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
    at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:226)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:127)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:116)
    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
    at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)
    at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)
    at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)
    at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
    at java.lang.Thread.run(Thread.java:595)

Answer 1

如果它对任何人都有帮助的话：我也遇到了类似的问题，将SaxParserFactory作为JVM选项提供是可行的

-Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl

Answer 2

我在尝试使用xml模式验证xml文件时遇到了这个问题。我在谷歌上搜索并找到了这个问题的根本原因

Jar文件，如xerces-2.6.2。深红色的罐子。杰尔，泽兰。颠簸 使用jaxp。jar有旧版本的SAXParserFactory。所以以上所有的罐子 文件应该从类parh中删除

根据jar的正确版本删除或更新jar

Answer 3

没关系，我没有配置OC4J的全局web应用程序。xml以首先搜索本地类或创建自定义orion web。xml文件来做同样的事情

如果您遇到这个问题，最简单的方法是将这一行添加到（oc4j dir）\j2ee\home\config\global web应用程序中。xml:

<web-app-class-loader search-local-classes-first="true"/>

问题是，如果您尝试使用Xerces或另一种某种程度上最新的SAX解析器，您将遇到一个类路径问题，Oracle试图强迫您使用它（与他们的任何产品一样）

Answer 4

使用Commons Digester 1.7，而不是JDeveloper附带的Commons Digester。 http://jakarta.apache.org/commons/digester/