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Struts Error Help Needed

Joe Harry
Ranch Hand

Joined: Sep 26, 2006
Posts: 9243
    
    1

Guys,

I tried one sample example and getting the error as follows,

My Struts-config.xml file,

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">


<struts-config>
<form-beans>
<form-bean name="nameForm" type="example.NameForm"></form-bean>
</form-beans>

<global-exceptions>

</global-exceptions>



<controller processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>

<!-- <message-resources parameter="com/myapp/struts/ApplicationResource"/> -->

<!-- ========================= Tiles plugin ===============================-->
<!--
This plugin initialize Tiles definition factory. This later can takes some
parameters explained here after. The plugin first read parameters from
web.xml, thenoverload them with parameters defined here. All parameters
are optional.
The plugin should be declared in each struts-config file.
- definitions-config: (optional)
Specify configuration file names. There can be several comma
separated file names (default: ?? )
- moduleAware: (optional - struts1.1)
Specify if the Tiles definition factory is module aware. If true
(default), there will be one factory for each Struts module.
If false, there will be one common factory for all module. In this
later case, it is still needed to declare one plugin per module.
The factory will be initialized with parameters found in the first
initialized plugin (generally the one associated with the default
module).
true : One factory per module. (default)
false : one single shared factory for all modules
- definitions-parser-validate: (optional)
Specify if xml parser should validate the Tiles configuration file.
true : validate. DTD should be specified in file header (default)
false : no validation

Paths found in Tiles definitions are relative to the main context.
-->

<!-- ========================= Validator plugin ================================= -->

</struts-config>

My index.jsp.

<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/lib/struts-html.tld" prefix="html" %>
<html>
<head>
<title>Sample Struts Application</title>
</head>
<body>
<html:form action="Name" name="nameForm" type="example.NameForm">
<table width="80%" border="0">
<tr>
<td>Name:</td>
<td><html:text property="name" /></td>
</tr>
<tr>
<td><html:submit /></td>
</tr>
</table>
</html:form>
</body>
</html>

My ActionForm,

package example;
//import statements
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
public class NameForm extends ActionForm {
private String name = null;
public String getName() {
return (name);
}
public void setName(String name) {
this.name = name;
}
public void reset(ActionMapping mapping, HttpServletRequest request) {
this.name = null;
}
}

My Action class,

package example;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class NameAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String target = new String("success");
String name = null;
if ( form != null ) {
// Use the NameForm to get the request parameters
NameForm nameForm = (NameForm)form;
name = nameForm.getName();
}
// if no mane supplied Set the target to failure
if ( name == null ) {
target = new String("failure");
}
else {
request.setAttribute("NAME", name);
}
return (mapping.findForward(target));
}
}

My displayname.jsp,

<html>
<head>
<title>Sample Struts Display Name</title>
</head>
<body>
<table width="80%" border="0">
<tr>
<td>Hello <%= request.getAttribute("NAME") %> !!</td>
</tr>
</table>
</body>
</html>

My web.xml file,

<?xml version="1.0" encoding="UTF-8"?>
<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>
StrutsExample</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>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

The error I get when I run the example is as below,

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /index.jsp(8,3) Attribute name invalid for tag form according to TLD
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:238)
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:975)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:696)
org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1441)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Validator.validate(Validator.java:1475)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:214)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.0.28


SCJP 1.4, SCWCD 1.4 - Hints for you, SCBCD Hints - Demnachst, SCDJWS - Auch Demnachst
Did a rm -R / to find out that I lost my entire Linux installation!
Joe Harry
Ranch Hand

Joined: Sep 26, 2006
Posts: 9243
    
    1

Later making changes to struts-config file I'm getting the error as below,

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Cannot retrieve mapping for action: "/Name"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.index_jsp._jspService(index_jsp.java:88)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

javax.servlet.jsp.JspException: Cannot retrieve mapping for action: "/Name"
org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:840)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:467)
org.apache.jsp.index_jsp._jspx_meth_html_form_0(index_jsp.java:119)
org.apache.jsp.index_jsp._jspService(index_jsp.java:77)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

The struts-config.xml file,

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_3.dtd">

<struts-config>

<form-beans>
<form-bean name="nameForm" type="example.NameForm"></form-bean>
</form-beans>
<global-exceptions></global-exceptions>
<global-forwards></global-forwards>
<!--
<action path="/Name" type="example.NameAction" name="nameForm" input="/index.jsp">
<forward name="success" path="/displayname.jsp"/>
<forward name="failure" path="/index.jsp"/>
</action>-->


<controller processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>

<!-- <message-resources parameter="com/myapp/struts/ApplicationResource"/> -->

<!-- ========================= Tiles plugin ===============================-->
<!--
This plugin initialize Tiles definition factory. This later can takes some
parameters explained here after. The plugin first read parameters from
web.xml, thenoverload them with parameters defined here. All parameters
are optional.
The plugin should be declared in each struts-config file.
- definitions-config: (optional)
Specify configuration file names. There can be several comma
separated file names (default: ?? )
- moduleAware: (optional - struts1.1)
Specify if the Tiles definition factory is module aware. If true
(default), there will be one factory for each Struts module.
If false, there will be one common factory for all module. In this
later case, it is still needed to declare one plugin per module.
The factory will be initialized with parameters found in the first
initialized plugin (generally the one associated with the default
module).
true : One factory per module. (default)
false : one single shared factory for all modules
- definitions-parser-validate: (optional)
Specify if xml parser should validate the Tiles configuration file.
true : validate. DTD should be specified in file header (default)
false : no validation

Paths found in Tiles definitions are relative to the main context.
-->

<!-- ========================= Validator plugin ================================= -->

</struts-config>
Chris Boldon
Ranch Hand

Joined: Aug 10, 2006
Posts: 190
You have the formbean name specific in the struts-config but not the action mapping.
Nick Williamson
Ranch Hand

Joined: Jan 06, 2007
Posts: 73
1. in your second post you have your action mapping, but it's commented out.
2. name attribute is not needed int the html form tag. Struts will put that in there once the html is rendered from the tag.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Struts Error Help Needed
 
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