在struts2中加入装饰器sitemesh

本文主要是介绍在struts2中加入装饰器sitemesh，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

装饰器可以统一设置页面的版式，统一引入需要使用的JS，CSS等等作用。

1. 导入sitemesh-xxx.jar包

2. 在web.xml中进行配置

<filter>
  <filter-name>struts-cleanup</filter-name>
  <filter-class>
   org.apache.struts2.dispatcher.ActionContextCleanUp
  </filter-class>
</filter>
<filter-mapping>
  <filter-name>struts-cleanup</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

<!--

注意ActionContextCleanUp过滤器必须在FilterDispatcher之前配置，

ActionContextCleanUp的主要功能是通知FilterDispatcher执行完毕不要清除

ActionContext，以便sitemesh装饰器可以访问Struts值堆栈。

-->

<filter>
  <filter-name>sitemesh</filter-name>
  <filter-class>
   com.opensymphony.module.sitemesh.filter.PageFilter
  </filter-class>
</filter>
<filter-mapping>
  <filter-name>sitemesh</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

<filter>
  <filter-name>struts</filter-name>
  <filter-class>
   org.apache.struts2.dispatcher.FilterDispatcher
  </filter-class>
</filter>
<filter-mapping>
  <filter-name>struts</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

注意三个过滤器的前后顺序，不能换！~

3. 在WEB-INF目录下配置decorators.xml。如下demo

     <pattern>*.html</pattern>
     <pattern>/pages/login.do</pattern>
  </excludes>

<decorator name="main" page="main.jsp">
  <pattern>/*</pattern>
</decorator>

<decorator name="header" page="header.jsp" />
<decorator name="fooder" page="footer.jsp" />
</decorators>

4. 在decorators目录下，编写JSP页面

<%-- footer.jsp --%>

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<div>
  退出帮助<br/>
  <s:property value="footerTime"/><br/>
  版权所有© 2009
</div>

<%-- main.jsp --%>

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator"%>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title><decorator:title default="同学" />_湖南</title>
   <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
   <link href="<%= request.getContextPath() %>/css/style.css" rel="stylesheet" type="text/css" />
  <decorator:head />
</head>
<body <decorator:getProperty property="body.class" writeEntireProperty="true" />>
  <page:applyDecorator name="header" />
  <div class="a b">
         <decorator:body />
   </div>
  <page:applyDecorator name="fooder" />