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Hi,
I’m new with JSF and I’m trying to create my first jsf-service application using myeclipse.
I followed the first steps of the tutorial, but I have a NullPointerException when trying to use a JSF tag in my file.My web.xml is defined as follows:
<?xml version=”1.0″ encoding=”UTF-8″?>
<web-app xmlns=”http://java.sun.com/xml/ns/j2ee” xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” version=”2.4″ xsi:schemaLocation=”http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd”>
<context-param>
<param-name>javax.faces.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
</web-app>And faces-config.xml:
<?xml version=”1.0″ encoding=”UTF-8″?>
<!DOCTYPE faces-config PUBLIC
“-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN”
“http://java.sun.com/dtd/web-facesconfig_1_1.dtd”>The exception that I get is:
java.lang.NullPointerException
javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:615)
javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:217)
org.apache.myfaces.taglib.core.ViewTag.doStartTag(ViewTag.java:71)
(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)I guess that it’s a matter of configuration, but couldn’t find a solution.
Can someone help?Thanks,
EfratEfrat,
What is the entire stack trace? Sometimes the real problem is farther down.Also what URL are you using to get at your page? Are you trying to use a .jsp extension or .faces extension?
Hi,
My entire stack:
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)root cause
java.lang.NullPointerException
javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:615)
javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:217)
org.apache.myfaces.taglib.core.ViewTag.doStartTag(ViewTag.java:71)
org.apache.jsp.first_jsp._jspx_meth_f_view_0(org.apache.jsp.first_jsp:111)
org.apache.jsp.first_jsp._jspService(org.apache.jsp.first_jsp:86)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)I’m trying to run a .jsp extension. (http://localhost:8080/myApp/first.jsp).
My first.jsp is very simple:<%@ page language=”java” pageEncoding=”UTF-8″%>
<%@ taglib uri=”http://java.sun.com/jsf/html” prefix=”h” %>
<%@ taglib uri=”http://java.sun.com/jsf/core” prefix=”f” %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+”://”+request.getServerName()+”:”+request.getServerPort()+path+”/”;
%><!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
<html>
<head>
<base href=”<%=basePath%>”><title>My JSF ‘first.jsp’ starting page</title>
<meta http-equiv=”pragma” content=”no-cache”>
<meta http-equiv=”cache-control” content=”no-cache”>
<meta http-equiv=”expires” content=”0″>
<meta http-equiv=”keywords” content=”keyword1,keyword2,keyword3″>
<meta http-equiv=”description” content=”This is my page”>
<!–
<link rel=”stylesheet” type=”text/css” href=”styles.css”>
–>
</head><body>
<f:view>
<f:loadBundle basename=”BUNDLE_NAME_HERE” var=”bundle”/>
This is my JSF JSP page. <br>
</f:view>
</body>
</html>Thanks a lot,
Efrat
