本文介绍了Struts2错误示例的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图通过eclipse设置一个struts 2的例子，使用2.3.20。经过多次审查和搜索，我似乎无法解决下面的错误。我已经审查了多个站点搜索的答案，甚至拉出所有不必要的jar文件。有人有任何线索吗？ 2015年2月2日下午5:14:27 org.apache.struts2.dispatcher .DefaultDispatcherErrorHandler错误
SEVERE：处理请求期间发生异常：null
java.lang.NullPointerException
at com.opensymphony.xwork2.ognl.SecurityMemberAccess.isPackageExcluded（SecurityMemberAccess.java:114）
at com.opensymphony.xwork2.ognl.SecurityMemberAccess.isAccessible（SecurityMemberAccess.java:63）
at ognl.OgnlRuntime.isMethodAccessible（OgnlRuntime.java:1880）
at ognl.OgnlRuntime.callAppropriateMethod（OgnlRuntime .java：1225）
at ognl.ObjectMethodAccessor.callMethod（ObjectMethodAccessor.java:68）
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo（XWorkMethodAccessor.java:117）
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod（XWorkMethodAccessor.java:108）
at ognl.OgnlRuntime.callMethod（OgnlRuntime.java:1369）
在ognl.ASTMethod.getValueBody（ASTMethod.java:90）
at ognl.SimpleNode.evaluateGetValueBody（SimpleNode.java:212）
at ognl.SimpleNode.getValue（SimpleNode.java:258）
at ognl.Ognl.getValue（Ognl.java:494）
at ognl.Ognl.getValue（Ognl.java:458）
at com.opensymphony.xwork2.ognl.OgnlUtil $ 2.execute（OgnlUtil .java：309）
at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute（OgnlUtil.java:340）
at com.opensymphony.xwork2.ognl.OgnlUtil.getValue（OgnlUtil.java:307 ）
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction（DefaultActionInvocation.java:423）
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly（DefaultActionInvocation.java:287）
at com。 opensymphony.xml ion.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept（DebuggingInterceptor.java:256）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（ DefaultActionInvocation.java:244）
在com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept（DefaultWorkflowInterceptor.java:167）
在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java： 98）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept（ValidationInterceptor.java:265）
在org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept（AnnotationValidationInterceptor.java:76）
在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
at com .opensymphony.xwor com2.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept DefaultActionInvocation.java:244）
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept（ParametersInterceptor.java:229）
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java： 98）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept（ParametersInterceptor.java:229）
在com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在com.opensymphony.xwork2 .interceptor.S taticParametersInterceptor.intercept（StaticParametersInterceptor.java:191）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor.MultiselectInterceptor.intercept（MultiselectInterceptor。 java：73）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept（DateTextFieldInterceptor.java:125）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor.CheckboxInterceptor.intercept（CheckboxInterceptor.java:91）
在com.opensymphony .xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor.FileUploadInterceptor.intercept（FileUploadInterceptor.java:253）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke （DefaultActionInvocation。 java：244）
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept（ModelDrivenInterceptor.java:100）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept（ScopedModelDrivenInterceptor.java:141）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
at com.opensymphony .xwork2.interceptor.ChainingInterceptor.intercept（ChainingInterceptor.java:145）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在com.opensymphony.xwork2.interceptor.PrepareInterceptor .comInopcept ：244）
at com .opensymphony.xwork2.interceptor.I18nInterceptor.intercept（I18nInterceptor.java:139）
在com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.interceptor .ServletConfigInterceptor.intercept（ServletConfigInterceptor.java:164）
at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept（AliasInterceptor com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept（ExceptionMappingInterceptor.java:189）
b $ b at com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:244）
在org.apache.struts2.impl.StrutsActionProxy.execute（StrutsActionProxy.java:54）
在org。 apache.struts2.dispatcher.Dispatcher.serviceAction（Dispatcher.java： 564）
在org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction（ExecuteOperations.java:81）
在org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter（StrutsPrepareAndExecuteFilter。 java：99）
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:241）
在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:208）
在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:220）
在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:122）
在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:501）
在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:170）
在org.apache .catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:98）
在org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.jav a：950）
在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:116）
在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）
在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1040）
在org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:607）
在org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:313）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145）
在java .util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:615）
在java.lang.Thread.run（Thread.java:745）
web.xml
<？xml version =1.0 encoding =UTF-8？>
< web-app id =WebApp_9version =2.4xmlns =http://java.sun.com/xml/ns/j2ee
xmlns：xsi =http： /www.w3.org/2001/XMLSchema-instance
xsi：schemaLocation =http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns /javaee/web-app_2_5.xsd\">
< display-name> Struts2FirstProject< / display-name>
< filter>
< filter-name>
struts2
< / filter-name>
< filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
< / filter-class>
< / filter>
< filter-mapping>
< filter-name> struts2< / filter-name>
< url-pattern> / *< / url-pattern>
< / filter-mapping>
< welcome-file-list>
< welcome-file> default.jsp< / welcome-file>
< / welcome-file-list>
< / web-app>
Struts.xml
<？xml version =1.0encoding =UTF-8？>
<！DOCTYPE struts PUBLIC
- // Apache Software Foundation // DTD Struts Configuration 2.0 // EN
http://struts.apache.org/dtds/struts- 2.0.dtd>
< struts>
< package name =defaultextends =struts-defaultnamespace =/>
< action name =getTutorialclass =TutorialAction>
< result name =success> TutorialView.jsp< / result>
< result name =error> Error.jsp< / result>
< / action>
< / package>
< / struts>
以下是我要的jar文件。
解决方案
我的错误与你的错误一样，我通过移动文件struts.xml到WebContent / WEB-INF / classes
I am attempting to set up through eclipse a struts 2 example using 2.3.20. After much review and searching, I cannot seem to resolve the error below. I have review multiple site searching for answers and even pulled out all unnecessary jar files. Does anyone have any clue on this one?
Feb 02, 2015 5:14:27 PM org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler error
SEVERE: Exception occurred during processing request: null
java.lang.NullPointerException
at com.opensymphony.xwork2.ognl.SecurityMemberAccess.isPackageExcluded(SecurityMemberAccess.java:114)
at com.opensymphony.xwork2.ognl.SecurityMemberAccess.isAccessible(SecurityMemberAccess.java:63)
at ognl.OgnlRuntime.isMethodAccessible(OgnlRuntime.java:1880)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1225)
at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108)
at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369)
at ognl.ASTMethod.getValueBody(ASTMethod.java:90)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.Ognl.getValue(Ognl.java:494)
at ognl.Ognl.getValue(Ognl.java:458)
at com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309)
at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340)
at com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250)
at org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>Struts2FirstProject</display-name>
<filter>
<filter-name>
struts2
</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
Struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="default" extends="struts-default" namespace="/">
<action name="getTutorial" class="TutorialAction">
<result name="success">TutorialView.jsp</result>
<result name="error">Error.jsp</result>
</action>
</package>
</struts>
Here are the jar files I am down to.
解决方案
I got the same error as yours, I solved it by moving the file 'struts.xml' into WebContent/WEB-INF/classes
这篇关于Struts2错误示例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！