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From "Alexey Poimtsev (JIRA)" <j...@apache.org>
Subject [jira] Created: (WW-1561) Exception using form tag
Date Thu, 14 Dec 2006 15:47:57 GMT
Exception using form tag
------------------------

                 Key: WW-1561
                 URL: http://issues.apache.org/struts/browse/WW-1561
             Project: Struts 2
          Issue Type: Bug
    Affects Versions: 2.0.1
         Environment: Windows XP
Jetty 6.0.1
Caucho Resin 3.0.22
            Reporter: Alexey Poimtsev


Hi, all.
I try to develop simple forms application with this code:

index.jsp

<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>My page</title>
	</head>
	<body>
 	<s:form action="sendSMS" method="post">
			<s:textfield name="smsFrom">Message From:</s:textfield> 
					<s:textfield name="smsTo">Message To:</s:textfield>
					<s:textarea name="smsMessageBody" cols="20" rows="10">Message:</s:textarea>
					<s:submit type="submit" value="Submit" />
		</s:form>
	</body>
</html>

web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!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 TestApp</display-name>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext*.xml</param-value>
    </context-param>
    <filter>
        <filter-name>Struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.FilterDispatcher
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>Struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.jsp</welcome-file>        
    </welcome-file-list>
</web-app>

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">
		<default-interceptor-ref name="defaultStack" />
		<action name="sendSMS" class="com.alec_c4.testApp.SendSMS">
			<result name="success" type="dispatcher">
				/success.jsp
			</result>
			<result name="error" type="dispatcher">/fail.jsp</result>
			<interceptor-ref name="servlet-config" />
		</action>
	</package>
</struts>


/**
 * 
 */

package com.alec_c4.testApp;

import java.util.Map;
import org.apache.struts2.interceptor.ParameterAware;
import com.opensymphony.xwork2.ActionSupport;
/**
 * @author Alec C4
 *
 */
public class SendSMS extends ActionSupport implements ParameterAware {

	private static final long serialVersionUID = 2775840359087216729L;
	String[] smsFrom;
	String[] smsTo;
	String[] smsMessageBody;

	
	
	public Map parameters;
	
	  public Map getParameters() {
		    return parameters;
		  }

	  public void setParameters(Map parameters) {
		    this.parameters = parameters;
		  }	
	
	public String execute () throws Exception {
		// Some Business Logic
		smsFrom = (String[]) parameters.get("smsFrom");
		smsTo = (String[]) parameters.get("smsTo");
		smsMessageBody = (String[]) parameters.get("smsMessageBody");
		if (smsFrom == null || smsFrom[0] == null || smsFrom[0].length() == 0) 
		return ERROR;
		else return SUCCESS;
	}
}

and when i have compiled application i put this one in webapp root and start the server. As
a result i see this exception:

2006-12-14 18:35:11.713::WARN:  /testApp/index.jsp
java.lang.NullPointerException
        at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:703)
        at org.apache.struts2.components.UIBean.end(UIBean.java:450)
        at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTa
gSupport.java:36)
        at org.apache.jsp.index_jsp._jspx_meth_s_textfield_0(org.apache.jsp.inde
x_jsp:200)
        at org.apache.jsp.index_jsp._jspx_meth_s_form_0(org.apache.jsp.index_jsp
:143)
        at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:93)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:358)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:4
40)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:335)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:445
)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3
56)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:2
26)

Could you tell me please - what the problem is ? This problem is actual for Jetty and Resin.

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