I try to use Spring MVC with JSF. But I use JSF just as presentation layer. Its not a problem to display a JSF view for my #Controller... but if I use a h:form, the renderer uses a wrong URL (without my dispatcher).
This is the correct URL to get the view (method=GET):
http://localhost:8080/AppName/dispatcher/testController/create
The JSF views form gets rendered with this URL:
http://localhost:8080/AppName/WEB-INF/jsf/testController/create
The correct URL for the form would be (method=POST):
http://localhost:8080/AppName/dispatcher/testController/create
My Controller:
#Controller
#RequestMapping(value = "/testController")
public final class TestController
{
[...]
#RequestMapping(value = "/create", method = RequestMethod.GET)
public void getCreateNew(final Model model)
{
[...]
}
#RequestMapping(value = "/create", method = RequestMethod.POST)
public void postCreateNew(final Model model)
{
[...]
}
}
My View:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:l="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
>
<h:head>
<title>Create new</title>
</h:head>
<h:body>
<h:messages errorClass="error"/>
<f:view>
<h:form>
<h:panelGrid columns="2" columnClasses="label, value" styleClass="grid">
<h:outputText value="${name}" />
<p:inputText label="Test: ${name}" required="true">
<f:validateLength minimum="3" />
</p:inputText>
</h:panelGrid>
<p:commandButton type="submit" value="${labelSubmit}" action="spring:#testController.doneCreateNew" />
</h:form>
</f:view>
</h:body>
</html>
The web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" 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_3_0.xsd">
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/dispatcher/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
</web-app>
The faces-config.xml:
<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="2.1"
xmlns="http://java.sun.com/xml/ns/javaee"
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-facesconfig_2_1.xsd">
<application>
<el-resolver>
org.springframework.web.jsf.el.SpringBeanFacesELResolver
</el-resolver>
</application>
</faces-config>
The dispatcher-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsf/" p:suffix=".jsf" />
</beans>
And the applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<mvc:annotation-driven />
<context:annotation-config/>
<context:component-scan base-package="com.sommer_engineering"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
</beans>
Anybody knows why this does not work? I would be happy for any idea...
see edit below
I'll leave my answer here since I had to work through this same issue myself. Integrating a rewrite rule through a simple pretty-config worked for me.
Add the dependencies for PrettyFaces
(note: If you're not familiar with PrettyFaces, then it's probably not what you think it is)
Add the rewrite rule
if your servlet mapping for the dispatcher looks like:
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/dispatcher/*</url-pattern>
</servlet-mapping>
and your view resolver has properties like this:
p:prefix="/WEB-INF/jsf/" p:suffix=".jsf"
then your pretty-config.xml should be something like:
<pretty-config xmlns="http://ocpsoft.org/schema/rewrite-config-prettyfaces"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://ocpsoft.org/schema/rewrite-config-prettyfaces
http://ocpsoft.org/xml/ns/prettyfaces/rewrite-config-prettyfaces.xsd">
<url-mapping id="pretty_spring_urls">
<pattern value="/dispatcher/WEB-INF/jsf/{spring}.jsf" />
<view-id value="/dispatcher/{spring}" />
</url-mapping>
</pretty-config>
edit:
Prettyfaces, however, has only worked for me on an embedded glassfish server. Urlrewrite has worked for me on glassfish, tomcat 7 and jboss.
You could try this to imply it to dispatcher-servlet.xml
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="" p:suffix=".jsf" />
Related
I am getting 404 error every time executing Spring application. I have created the dynamic web project using eclipse. I am new to spring and use eclipse first time. Please help to solve this issue.
My 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>SpringBasic</display-name>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
<context:component-scan base-package="com.bt.controller" />
<mvc:annotation-driven />
<bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "prefix" value = "/WEB-INF/jsp/" />
<property name = "suffix" value = ".jsp" />
</bean>
</beans>
MyController
package com.bt.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
#Controller
public class MyController {
#RequestMapping("/")
#ResponseBody
public ModelAndView loadhellopage() {
System.out.println("controller");
String msg="Finally";
ModelAndView mav=new ModelAndView("hellopage");
mav.addObject("msg", "Finally");
return mav;
}
}
hellopage.jsp:
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
${message}
</body>
</html>
this is my folder structure:
Also included all the jar files in lib folder under WEB-INF.
When running the project on apache tomcat it is giving 404 error
trying a spring rest application and getting 404, am not able to figure out the problem, the server console shows nothing about the problem, below is the code
there were many posts for this problem, i checked them did modifications also, none worked
could any body please give the solution to this.Thank you
this is controller
#RestController
#RequestMapping("/service")
public class SpringServiceController {
#RequestMapping(value = "/{name}", method = RequestMethod.GET)
public String getGreeting(#PathVariable String name) {
String result="Hello "+name;
System.out.println("in the controller");
return result;
}
}
web.xml
<web-app 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/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>springRest</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>rest</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/rest-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
this is rest-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="com.org.vasu.springRest.controller.*" />
</beans>
<context:component-scan base-package="com.org.vasu.springRest.controller" />
I have the following Spring project in eclipse:
When I go to:
http://[my-host]:8082/webapp-module/hello
The WEB/INF/jsp/hello.jsp page is loaded just fine. But I would also like to define a default start page (WEB/INF/index.jsp) when I go to:
http://[my-host]:8082/webapp-module
Currently that does not work. Do I need to add a separate controller for this?
My web.xml file:
<web-app id="WebApp_ID" 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/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Spring MVC Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/webapp-module-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<servlet>
<servlet-name>webapp-module</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>webapp-module</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
And my webapp-module-servlet.xml file:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.samples" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
Step 1: Move index.jsp inside /WEB-INF/jsp/ folder.
Step 2: In your #Controller class add below method:
#RequestMapping("/")
public String home(){
return "index";
}
Your complete Controller class should look like this:
#Controller
public class LoginController {
#RequestMapping("/")
public String home(){
return "index";
}
#RequestMapping("/hello")
public String showhello(){
return "hello";
}
}
i am using Spring social for fetching the data from facebook but encountering a weird error
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController': Injection of autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.social.facebook.api.Facebook
org.springframework.social.quickstart.HomeController.facebook; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type
[org.springframework.social.facebook.api.Facebook] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
I believe facebook object will come from the api. I don't have to define it manually.
my web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">
<display-name>Spring Social Facebook</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/forms/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
rootcontext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Root Context: defines shared resources visible to all other web components -->
<!-- Enable #Annotation-drive bean configuration -->
<context:annotation-config />
<context:component-scan base-package="org" />
<!-- Configures External Property Resolution -->
<import resource="properties.xml" />
<!-- Configures Shared Data Access Resources -->
<!-- <import resource="data.xml" /> -->
<!-- Configures Spring Social -->
<bean class="org.springframework.social.quickstart.config.SocialConfig" />
</beans>
servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC #Controller programming model -->
<annotation-driven />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
</beans:beans>
In my controller I am autowiring my Facebook obj.
#Controller
public class HomeController {
#Autowired
private Facebook facebook;
/*
#Inject
public HomeController(Facebook facebook) {
this.facebook = facebook;
}*/
#RequestMapping(value = "/fb", method = RequestMethod.GET)
public String home(Model model) {
System.out.println("Inside home method");
List<Reference> friends = facebook.friendOperations().getFriends();
model.addAttribute("friends", friends);
return "home";
}
}
taken from spring social quickstart example. Probably you cant inject it by yourself, instead you have to use factory-like method:
#Bean
#Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public Facebook facebook() {
return connectionRepository().getPrimaryConnection(Facebook.class).getApi();
}
it needs other dependencies, no point to copy-paste them all here. Take a look at:
https://github.com/spring-projects/spring-social-samples/blob/master/spring-social-quickstart/src/main/java/org/springframework/social/quickstart/config/SocialConfig.java
I've looked through all similar Qs on stackoverflow but it didn't help, sorry. The main difference I have from all of them is that I got EMPTY action name in error message. Googling didn't help :(
Hope someone just could give a hint where to look for the source of the problem. thx
message:
Stacktraces
There is no Action mapped for namespace [/] and action name [] associated with context path [/struts]. - [unknown location]
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58
..................
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>
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/*" extends="struts-default">
<action name="login"
class="training.struts.action.LoginAction">
<result>login.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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>Struts Lab</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>
<!-- Spring Config -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/springServlet/appServlet/mvc-servlet.xml,
/WEB-INF/db/db-cfg.xml,
/WEB-INF/springServlet/application-security.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springServlet/appServlet/mvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring Security -->
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- *** -->
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
well..image is impossible so the project structure is:
src/main/java
----+training.struts.action.LoginAction.java
src/main/webapp
----+WEB-INF
--------+classes
-----------+struts.xml
--------+db
-----------+db-cfg.xml
--------+springServlet
-----------+appServlet
---------------+mvc-servlet.xml
-----------+application-security.xml
--------+index.jsp
--------+login.jsp
--------+web.xml
UPDATE:
So sad to be stupid =(
I've moved my login.jsp from WEB-INF to webapp root and that solved the problem.
UPDATE2:
I've made some investigation:
if I remove "welcome-file-list" block from web.xml, container will look for "index.jsp" in webapp root to show as first view on application running. If I delete "index.jsp" then I'll got the identical exception message:
There is no Action mapped for namespace [/] and action name [] associated with context path [/struts]
So in my opinion if you have empty action name in error message with correct xml settings for struts, the first step should be start-up JSP availability checking.
Cheers, guys.
Add the below blank action to you struts.xml file in "/" package namespace and it will show the index.html when you will only try to access your url (like appid.app.com) and it will not show the error. Normally it will add a blank action and app engine will redirect the blank action to your welcome file.
<action name="" class="com.candi.actions.Dashboard" method="noAction">
<result name="success">index.jsp</result>
</action>
Add / in your namespace instead of /* :
<package name="default" namespace="/" extends="struts-default">
Or if issue not resolved than you can use Config Browser Plugin.
The Config Browser Plugin is a simple tool to help view an application's configuration at runtime. It is very useful when debugging problems that could be related to configuration issues.
OK, so I have placed login.jsp in a wrong place in my web-app folders structure.
That was the mistake
Add the following package in struts.xml
<package name="default" namespace="/" extends="struts-default">
<action name="login"
class="training.struts.action.LoginAction">
<result>login.jsp</result>
</action>
</package>
I changed the namespace in package tag to '/' and the problem resolved!!!
For me, I changed the opening tag of the web.xml file from
<web-app>
to
<web-app id="WebApp_ID" 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/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">