使用 struts 的 Web 应用程序中的 ClassNotFoundException

发布于 2024-10-19 07:19:30 字数 3324 浏览 7 评论 0原文

我正在使用 Apache Struts 开发一个 Web 应用程序,并将其部署在 JBoss 服务器上。使用eclipse进行开发。

我已配置 web.xml 将所有 *.do 请求转发到 ActionServlet。

JSP 页面 (abc.jsp) 具有一个带有 action="newgoal.do" 的表单。

struts-config.xml 文件具有以下条目:

 <action path="/newgoal" type="com.misys.trng.AddingNewGoalAction">
 </action>

我已验证该类的路径是否正确。

我的网络应用程序中的所有其他 .do 转发都工作得很好。 当我从 abc.jsp 提交表单时,出现以下异常:

2:13:43,793 ERROR [RequestProcessor] No action instance for path /newgoal could be created
java.lang.ClassNotFoundException: com.misys.trng.AddingNewGoalAction
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:117)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:143)
at org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:280)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:218)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

我无法理解错误可能是什么。为什么我的应用程序无法加载 1 个特定类,而其他所有类都工作正常。请帮忙。

I am developing a web application using Apache Struts, to be deployed on JBoss Server. Using eclipse for development.

I have configured web.xml to forward all *.do requests to ActionServlet.

A JSP page (abc.jsp) has a form with action="newgoal.do".

The struts-config.xml file has the following entry:

 <action path="/newgoal" type="com.misys.trng.AddingNewGoalAction">
 </action>

I have verified that the path of the class is correct.

All other .do forwards in my web application are working perfectly fine.
When I submit the form from abc.jsp, I get the following exception:

2:13:43,793 ERROR [RequestProcessor] No action instance for path /newgoal could be created
java.lang.ClassNotFoundException: com.misys.trng.AddingNewGoalAction
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:117)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:143)
at org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:280)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:218)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

I cannot fathom what the error could be. Why isn't my application able to load 1 particular class, when all others are working fine. Please help.

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生生不灭 2024-10-26 07:19:30

该类必须存在于 WEB-INF/classes 下,或者位于 WEB-INF/lib 下的 .jar 文件内。确保它确实如此。

The class must exist under WEB-INF/classes or be inside a .jar file under WEB-INF/lib. Make sure it does.

难如初 2024-10-26 07:19:30

也许你的动作中有些东西是静态的?我也有同样的问题。使用不存在的属性中的值初始化一个静态变量,然后不初始化操作。

Perhaps something is static in your action? I had the same problem. One static variable was initialized with a value in properties that did not exist, then the action not is initialized.

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