stackoverflow で同様の Q をすべて調べましたが、役に立ちませんでした。申し訳ありません。それらすべてとの主な違いは、エラー メッセージに EMPTY アクション名が表示されたことです。グーグルは役に立ちませんでした:(誰かが問題の原因を探すためのヒントを与えてくれることを願っています.thx
Error:
HTTP Status 404 - There is no Action mapped for namespace [/] and action name [] associated with context path [/LoginApplication].
--------------------------------------------------------------------------------
type Status report
message There is no Action mapped for namespace [/] and action name [] associated with context path [/LoginApplication].
description The requested resource (There is no Action mapped for namespace [/] and action name [] associated with context path [/LoginApplication].) is not available.
WARNING: Could not find action or result: /LoginApplication/
There is no Action mapped for namespace [/] and action name [] associated with context path [/LoginApplication]. - [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:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Struts 2 Web Application</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>
</web-app>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<constant name="struts.devMode" value="true" />
<constant name="struts.custom.i18n.resources" value="ApplicationResources" />
<package name="user" namespace="/" extends="struts-default">
<!-- http://localhost:8080/Struts-Example/User/Login.action -->
<action name="login">
<result>/Pages/HomePage.jsp</result>
</action>
<action name="validatelogin" class="/LoginApplication/src/ValidateLogin"
method="execute">
<result name="Success">/Pages/Success.jsp</result>
<result name="Failure">/Pages/Failure.jsp</result>
</action>
</package>
</struts>
ページ: HomePage.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Validate Login</title>
</head>
<body>
<s:form action="login" method="execute">
<s:textfield name="username" key="Username" size="20" />
<s:password name="password" key="Password" size="20" />
<s:submit />
</s:form>
</body>
</html>
サクセス.jsp
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>Login Application - Authorized</title>
</head>
<body>
Congratulations, <s:property value="username" />!
Welcome to Struts 2 world.
</body>
</html>
失敗.jsp
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title> Login Application - Unauthorized</title>
</head>
<body>
Sorry, You have entered an invalid Username / Password
</body>
</html>
ValidateLogin.java
public class ValidateLogin
{
public String username;
public String password;
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
public String execute()
{
if (this.username.equals("pinkesh") &&
this.password.equals("pinkesh"))//((this.username.equals("pinkesh")) &
(this.password.equals("pinkesh")))
return "Success";
else
return "Failure";
}
}
まあ..画像は不可能なので、プロジェクトの構造は次のとおりです。
src/
----ValidateLogin.Java
WenCOntent
-----+User
--------+Pages
------------+HomePage.jsp
------------+Success.jsp
------------+Failure.jsp
-----+web.xml
-----+struts.xml