1
我從遷移的Struts 2.3.3項目和Struts 2.5.12，我看到NullPointerException利用ActionSupport類getText方法時。Struts2.5.12 - NPE同時使用gettext的方法從ActionSupport中
我的動作類擴展了ActionSupport類。我還有打包在war文件中的package.properties文件。
我的動作類的樣子：
public class MyAction extends ActionSupport {
private List<String> months = new ArrayList<>(
Arrays.asList(getText("date.month.default"), "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"));
}
而在package.properties文件我有
date.month.default=MM
我看到下面的異常，當我的動作類的bean被實例化。有人知道我在這裏做錯了什麼嗎？
ERROR DefaultDispatcherErrorHandler Exception occurred during processing request: Unable to instantiate Action, entryAction, defined for 'entry' in namespace '/'Error creating bean with name 'entryAction' defined in "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml": Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [my.company.member.web.action.entry.EntryAction]: Constructor threw exception; nested exception is java.lang.NullPointerException
Unable to instantiate Action, entryAction, defined for 'entry' in namespace '/'Error creating bean with name 'entryAction' defined in "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml": Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [my.company.member.web.action.entry.EntryAction]: Constructor threw exception; nested exception is java.lang.NullPointerException - action - vfs:/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/struts-default.xml:133:44
at com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:318)
at com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:204)
at org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:62)
at org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:567)
at org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:285)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entryAction' defined in "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml": Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [my.company.member.web.action.entry.EntryAction]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:965)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075)
at com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:159)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:172)
at com.opensymphony.xwork2.factory.DefaultActionFactory.buildAction(DefaultActionFactory.java:22)
at com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:137)
at com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
... 37 more
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [my.company.member.web.action.entry.EntryAction]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:74)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:958)
... 48 more
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.ActionSupport.getTextProvider(ActionSupport.java:278)
at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:83)
at my.company.member.web.action.MyAction.<init>(MyAction.java:95)
at my.company.member.web.action.entry.EntryAction.<init>(EntryAction.java:22)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
... 50 more
項目結構：
和建造的戰爭結構爲：
以下jar文件添加到WAR文件的WEB-INF/lib目錄下：
classworlds-1.1.jar
com.springsource.org.aopalliance-1.0.0.jar
comm ONS-模棱兩可-0.8.jar
公地鏈1.2.jar
公地消化器-1.8.jar
公地文件上傳-1.2.1.jar
公地HttpClient的-3.1.jar
公地-io的-2.4.jar
公地lang3-3.6.jar
公地驗證-1.3.1.jar
的freemarker-2.3.23.jar
GSON-2.1.jar
HttpClient的-4.3 beta1.jar
httpclient-osgi-4.3.jar
的HttpCore-4.2.2.jar
了Javassist-3.18.0-GA.jar
JAXRPC-API-1.1.jar
JCIFS-1.3.17.jar
的log4j-API-2.8.2.jar
OGNL-3.1.12.jar
口 - 2.0.8.jar
串行 - 2.7.1.jar
彈簧AOP-3.0.5.RELEASE.jar
彈簧-ASM-3.0.5.RELEASE。罐子
spring-beans-3.0.5.RELEASE.jar
spring-context-3.0.5.RELEASE.jar
彈簧上下文支撐3.0.5.RELEASE.jar
彈簧芯3.0.5.RELEASE.jar
彈簧表達-3.0.5.RELEASE.jar
彈簧JDBC-3.0.5。 RELEASE.jar
spring-jms-3.0.5.RELEASE.jar
spring-orm-3.0.5.RELEASE.jar
spring-remoting-2.0.8。罐子
彈簧TX-3.0.5.RELEASE.jar
彈簧網絡3.0.5.RELEASE.jar
Struts2的核心 - 2.5.12.jar
的struts2-JSON-插件-2.5.12。罐子
struts2的 - 彈簧 - 插件-2.5.12.jar
struts2的瓷磚-插件-2.5.12.jar
瓦片-API-3.0.7.jar
瓦片-autotag核運行時-1.2。罐
tiles-core-3.0.7.jar
tiles-el-3.0.7.jar
tiles-freemarker-3.0.7.jar
個 瓦片-JSP-3.0.7.jar
瓦片-OGNL-3.0.7.jar
瓦片請求-API-1.0.6.jar
瓦片-請求的freemarker-1.0.6.jar
瓷磚，請求JSP-1.0.6.jar
瓷磚-請求的servlet-1.0.6.jar
瓷磚-的servlet-3.0.7.jar
瓷磚，模板3.0.7.jar
wsdl4j- 1.5.1.jar
xml-apis-1.3.02.jar
你可以張貼的動作類的源代碼？ –
Hi @RomanC，感謝您的回覆。我現在用動作類源代碼更新了我的問題。 – Prasann
這是不夠的信息。如果堆棧跟蹤已滿，則存在依賴管理問題。 –