jsf异常问题

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="gbk"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
 <%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
 index页面如下：<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <f:view>
 <h:form>
            <h3>请输入您的名称</h3>
            名称: <h:inputText value="#{user.name}"/><p>
            
           <h:commandButton value="送出" action="login"/>
            
        </h:form>
 </f:view>
 </body>
 </html>
 但出现以下异常，看不懂是什么问题。org.apache.jasper.JasperException: Exception in JSP: /index.jsp:1411: <title>Insert title here</title>
12: </head>
13: <body>
14:  <f:view>
15:  <h:form>
16:             <h3>请输入您的名称</h3>
17:             名称: <h:inputText value="#{user.name}"/><p>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
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:96)
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.index_jsp._jspx_meth_f_view_0(index_jsp.java:100)
org.apache.jsp.index_jsp._jspService(index_jsp.java:74)
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:332)
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:96初学jsf，请个位指点。

解决方案 »

  1.   

    没人会jsf吗。。自己顶下。。
      

  2.   

    你有没有，做JSF的servlet映射？
    你这个可能是因为直接访问.jsp造成的。你应该用映射之后的路径访问，我现在用的是，.faces ,或者/faces/***.jsp
      

  3.   

        <servlet>
            <servlet-name>Faces Servlet</servlet-name>
            <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        </servlet>
        <servlet-mapping>
            <servlet-name>Faces Servlet</servlet-name>
            <url-pattern>*.faces</url-pattern>
        </servlet-mapping>