跪求 RichFaces 下面报错信息 （真诚地希望大家帮忙看看）

最近向用RichFaces 写 一个 项目 ，刚开始学习 ，照着例子作 遇到如下错误 ，google 不出结果， 麻烦大家把忙看看，
十分感谢，真诚地希望大家帮忙看看，真的很希望很快的完成这个 
SEVERE: Servlet.service() for servlet Faces Servlet threw exception
org.apache.jasper.el.JspPropertyNotFoundException: /index.jsp(18,30) '#{user.name}' Target Unreachable, identifier 'user' resolved to null具体文件配置如下：web.xml 配置 ：<?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>RichDemo</display-name>
  
    <context-param>
   <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
   <param-value>server</param-value>
</context-param>
  
<context-param>
   <param-name>org.richfaces.SKIN</param-name>
   <param-value>blueSky</param-value>
</context-param>

<context-param>
      <param-name>org.richfaces.CONTROL_SKINNING</param-name>
      <param-value>enable</param-value>
</context-param>
 
<filter> 
   <display-name>RichFaces Filter</display-name> 
   <filter-name>richfaces</filter-name> 
   <filter-class>org.ajax4jsf.Filter</filter-class> 
</filter> 

<filter-mapping> 
   <filter-name>richfaces</filter-name> 
   <servlet-name>Faces Servlet</servlet-name>
   <dispatcher>REQUEST</dispatcher>
   <dispatcher>FORWARD</dispatcher>
   <dispatcher>INCLUDE</dispatcher>
</filter-mapping>
  
<listener>
   <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
  
<!-- Faces Servlet -->
<servlet>
   <servlet-name>Faces Servlet</servlet-name>
   <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
</servlet>
 
<!-- Faces Servlet Mapping -->
<servlet-mapping>
   <servlet-name>Faces Servlet</servlet-name>
   <url-pattern>*.jsf</url-pattern>
</servlet-mapping>
  
  <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>
  
  <login-config>
    <auth-method>BASIC</auth-method>
    </login-config>
</web-app>index.jsp<%@ page language="java"     pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<!-- RichFaces tag library declaration -->
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<%@ taglib uri="http://richfaces.org/rich" prefix="rich"%><html>
      <head>
            <title>RichFaces Greeter</title>
      </head>
      <body>
            <f:view>
                  <a4j:form>
                        <rich:panel header="RichFaces Greeter" style="width: 315px">
                              <h:outputText value="Your name: " />
                              <h:inputText value="#{user.name}" >
                                    <f:validateLength minimum="1" maximum="30" />
                              </h:inputText>
                              
                              <a4j:commandButton value="Get greeting" reRender="greeting" />
                              
                              <h:panelGroup id="greeting" >
                                    <h:outputText value="Hello, " rendered="#{not empty user.name}" />
                                    <h:outputText value="#{user.name}" />
                                    <h:outputText value="!" rendered="#{not empty user.name}" />
                              </h:panelGroup>
                        </rich:panel>
                  </a4j:form>
            </f:view>
      </body>
</html>faces-config.xml<?xml version="1.0" encoding="UTF-8"?><faces-config version="1.2" 
                    xmlns="http://java.sun.com/xml/ns/javaee"
                    xmlns:xi="http://www.w3.org/2001/XInclude"
                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
   <managed-bean>
      <description>UsernName Bean</description>
      <managed-bean-name>user</managed-bean-name>
      <managed-bean-class>demo.user</managed-bean-class>
      <managed-bean-scope>request</managed-bean-scope>
      <managed-property>
         <property-name>name</property-name>
         <property-class>java.lang.String</property-class>
         <value/>
      </managed-property>
   </managed-bean>
</faces-config>Java 类：
package demo;public class User {
private String name="";
public String getName() {
//return name;
return "asdfasdf";
}
public void setName(String name) {
System.out.print("asdf");
this.name = name;
}
  
}

解决方案 »

  1.   

    我用的是Tomcat 6.0 和 jar 包倒入如下：commons-beanutils-1.7.0.jar
    commons-collections-3.2.jar
    commons-digester-1.8.jar
    commons-logging-1.0.4.jar
    jhighlight-1.0.jar
    jsf-api.jar
    jsf-impl.jar
    jstl.jar
    richfaces-api-3.3.3.Final.jar
    richfaces-impl-3.3.3.Final.jar
    richfaces-ui-3.3.3.Final.jar
    standard.jar是不是jar包冲突阿，但是 是什么包冲突呢？
      

  2.   

    richfaces-api-3.3.3.Final.jar
    richfaces-impl-3.3.3.Final.jar
    richfaces-ui-3.3.3.Final.jar
    这几个包哪里有下载、