Struts 2：没有为名称空间映射的Action [/] [英] Struts 2 : There is no Action mapped for namespace [/]
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问题描述
我是Struts 2的新手，我一直关注Struts 2（Koushik）的视频教程。我创建了Struts.xml，action类和JSPs与教程中创建的相同。但它有以下异常。
例外：
code> Jan 13，2014 9:30:48 PM org.apache.struts2.dispatcher.Dispatcher warn
警告：找不到动作或结果：/Struts2Starter/getTutorial.action
没有操作映射为与上下文路径[/ Struts2Starter]相关联的命名空间[/]和操作名称[getTutorial]。 - [未知位置]
at com.opensymphony.xwork2.DefaultActionProxy.prepare（DefaultActionProxy.java:185）
at org.apache.struts2.impl.StrutsActionProxy.prepare（StrutsActionProxy.java:63）
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy（StrutsActionProxyFactory.java:37）
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy（DefaultActionProxyFactory.java:58）
at org。 apache.struts2.dispatcher.Dispatcher.serviceAction（Dispatcher.java:552）
在org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction（ExecuteOperations.java:77）
在org.apache。 struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter（StrutsPrepareAndExecuteFilter.java:99）
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
在org.apache。 catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:222）
在org.apache.catalina.core。 StandardContextValve.invoke（StandardContextValve.java:123）
在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）
在org.apache.catalina.core.StandardHostValve.invoke StandardHostValve.java:171）
at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:100）
at org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java： 953）
at org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）
at org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）
at org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1041）
at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:603）
在org .apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:312）
在java.util.concurrent.ThreadPoolExecutor.runWorker（未知源）
在java.util.concurrent。 ThreadPoolExecutor $ Worker.run（未知源）
at java.lang.Thread.run（未知源）
$ b b
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-default>
< action name =getTutorialclass =org.koushik.javabrains.action.TutorialAction>
< result name =success> /success.jsp< / result>
< result name =error> /error.jsp< / result>
< / action>
< / package>
< / struts>
Web.xml
<？xml version =1.0encoding =UTF-8？>
< web-app xmlns：xsi =http://www.w3.org/2001/XMLSchema-instancexmlns =http://java.sun.com/xml/ns/javaeexsi ：schemaLocation =http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsdid =WebApp_IDversion =3.0 >
< display-name> Struts2Starter< / display-name>
< welcome-file-list>
< welcome-file> index.html< / welcome-file>
< welcome-file> index.htm< / welcome-file>
< welcome-file> index.jsp< / welcome-file>
< welcome-file> default.html< / welcome-file>
< welcome-file> default.htm< / welcome-file>
< welcome-file> default.jsp< / welcome-file>
< / welcome-file-list>
< 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>
< / web-app>
TutorialAction.java（我正在使用的Action类） p>
package org.koushik.javabrains.action;
public class TutorialAction {
public String execute（）{
System.out.println（Hello from execute）;
returnsuccess;
}
}
项目结构 p>
success.jsp和error.jsp是带有一些文本的普通jsp文件。我做了很多事情来通过谷歌解决这个问题。但没有什么没有解决这个。请让我知道，如果有人知道这背后是什么。我非常感激。 ：）
解决方案
重命名 Struts.xml 命名约定为 struts.xml 将工作。
I am new to Struts 2 and I have been following a video tutorial on Struts 2(Koushik). I have created the Struts.xml, the action class and JSPs as same as created in the tutorial. But it gives the following exception.
Exception:
Jan 13, 2014 9:30:48 PM org.apache.struts2.dispatcher.Dispatcher warn
WARNING: Could not find action or result: /Struts2Starter/getTutorial.action
There is no Action mapped for namespace [/] and action name [getTutorial] associated with context path [/Struts2Starter]. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:552)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
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">
<action name="getTutorial" class="org.koushik.javabrains.action.TutorialAction">
<result name="success">/success.jsp</result>
<result name="error">/error.jsp</result>
</action>
</package>
</struts>
Web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Struts2Starter</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<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>
</web-app>
TutorialAction.java (Action class that I'm using)
package org.koushik.javabrains.action;
public class TutorialAction {
public String execute(){
System.out.println("Hello from execute");
return "success";
}
}
Project structure
success.jsp and error.jsp are normal jsp files with some text. I did a lot of things to resolve this issue by googling. But nothing didn't solve this. Please let me know if anyone knows what's behind this. I highly appreciate it. :)
解决方案
Renaming Struts.xml naming convention to struts.xml will work.
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