Exception-“ java.lang.NullPointerException: Module 'null' ne se trouve pas ” dans Java Struts 1.3

Tout deplyoing Struts 1.3 application de Connexion à localhost 8080 (Apache Tomcat 6.0.16 Serveur). Je suis d'erreur suivant.

D'État HTTP 500 -


type de rapport d'Exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

org.apache.jasper.JasperException: Une exception s'est produite traitement page JSP /Login.jsp à la ligne 13

10: </head>
11: <body>
12: 
13:     <html:form action="/Login.do">
14:         Username : <html:text name="LoginForm" property="userName"/><br/>
15:         Password : <html:password name="LoginForm" property="password"/><br/>
16:         <html:submit value="Login"/>

Stacktrace:

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

cause

java.lang.NullPointerException: Module 'null' not found.
    org.apache.struts.taglib.TagUtils.getModuleConfig(TagUtils.java:755)
    org.apache.struts.taglib.TagUtils.getModuleConfig(TagUtils.java:735)
    org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:818)
    org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:488)
    org.apache.jsp.Login_jsp._jspx_meth_html_005fform_005f0(Login_jsp.java:105)
    org.apache.jsp.Login_jsp._jspService(Login_jsp.java:78)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note Le plein de trace de pile de la cause racine est disponible dans Apache Tomcat/6.0.16 journaux.


Apache Tomcat/6.0.16

De connexion.jsp

  <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>

<!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>Login Form</title>
</head>

<body>
    <html:form action="/Login">
        Username : <html:text name="LoginForm" property="userName"/><br>
        Password : <html:password name="LoginForm" property="password"/><br>
        <html:submit value="Login"/>
    </html:form>
</body>
</html>

Struts-Config.xml

<?xml version="1.0" encoding="UTF-8"?>
<struts-config>
    <!-- ========== Form Bean Definitions ================================== -->
    <form-beans>
        <form-bean name="loginForm" type="org.suraj.form.LoginForm"/>
    </form-beans>
    <!-- ========== Action Mapping Definitions ============================= -->
    <action-mappings>
            <action name="loginForm" path="/Login" type="org.suraj.action.LoginAction" scope="request" input="/Login.jsp" validate="true">
                <forward name="failure" path="/Failure.jsp" redirect="true"/>
                <forward name="success" path="/Success.jsp" redirect="true"/>
            </action>
    </action-mappings>

</struts-config>

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"
    id="WebApp_ID" version="2.5">

    <display-name>Login</display-name>
    <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>

        <load-on-startup>2</load-on-startup>        
    </servlet>

    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>Login.jsp</welcome-file>
    </welcome-file-list>

</web-app>

LoginForm.java

package org.suraj.form;  

import org.apache.struts.action.ActionForm;

public class LoginForm extends ActionForm {


    private static final long serialVersionUID = 1029546343415365160L;
    private String userName;
    private 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;
    }


}

LoginAction.java

package org.suraj.action;

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;
import org.suraj.form.LoginForm;

public class LoginAction extends Action{

    private static final long serialVersionUID = -8847579600418060362L;

    private final static String SUCCESS = "success";

    private final static String FAILURE = "failure";

    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
    throws Exception {

        LoginForm loginForm = (LoginForm) form;

        if (loginForm.getUserName().equals(loginForm.getPassword())) {

            return mapping.findForward(SUCCESS);

        } else {

            return mapping.findForward(FAILURE);

        }
    }
}

OriginalL'auteur suraj_fale | 2012-03-21