JavaServer Faces 2.2 requires Dynamic Web Module 2.5 or newer

  问题描述 ： JavaServer Faces 2.0 requires Dynamic Web Module 2.5 or newer...

First:

   用图二替代图一

1  <?xml version="1.0" encoding="UTF-8"?>2   <!-- <!DOCTYPE web-app3  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"4  "http://java.sun.com/dtd/web-app_2_3.dtd">

图一

1 <web-app xmlns="http://java.sun.com/xml/ns/javaee"2     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"3     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 4                         http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"5                         version="3.0">6     <display-name>Archetype Created Web Application</display-name>7 </web-app>
图二

Second:

关闭Eclipse，改项目下的.settings\org.eclipse.wst.common.project.facet.core.xml，将 版本改成为3.0,将成后是<installed facet="jst.web" version="3.0"/>，再启动Eclipse.

Last：

右键项目->Maven->Update Project