sitemesh简单应用

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babyhe 2010-01-11 10:48:11 博主文章分类：Java

文章标签 职场 jsp j2ee 休闲 sitemesh 文章分类 前端开发

web开发当中,前端的页面逻辑很难被重用，当我们在每一个页面中用include来复用公共的header, css, js，footer时，会大量的出现重复的代码，无形中增加的开发人员的负担.sitemesh通过filter截取request和response，并给原始的页面加入一定的装饰(可能为header,footer...)，然后把结果返回给客户端，并且被装饰的原始页面并不知道sitemesh的装饰，这也就达到了脱耦的目的。
SiteMesh 是opensymphony项目,下是官网中的介绍:
SiteMesh is a web-page layout and decoration framework and web- application integration framework to aid in creating large sites consisting of many pages for which a consistent look/feel, navigation and layout scheme is required.

SiteMesh intercepts requests to any static or dynamically generated HTML page requested through the web-server, parses the page, obtains properties and data from the content and generates an appropriate final page with modifications to the original. This is based upon the well-known GangOfFour Decorator design pattern.

SiteMesh can also include entire HTML pages as a Panel within another page. This is similar to a Server-Side Include, except that the HTML document will be modified to create a visual window (using the document's Meta-data as an aid) within a page. Using this feature, Portal type web sites can be built very quickly and effectively. This is based upon the well-known GangOfFour Composite design pattern.

SiteMesh is built using Java 2 with Servlet, JSP and XML technologies. This makes it ideal for use with J2EE applications, however it can be integrated with server-side web architectures that are not Java based such as CGI (Perl/Python/C/C++/etc), PHP, Cold Fusion, etc...

SiteMesh is very extensible and is designed in a way in which it is easy to extend for custom needs.

WEB-INF 下decorator.xml文件

<decorators defaultdir="/WEB-INF/decorators">
<excludes>
<pattern>/css/*</pattern>
<pattern>/js/*</pattern>
<pattern>/p_w_picpaths/*</pattern>
<pattern>/dojo/*</pattern>
<pattern>/webwork/*</pattern>
<pattern>/login.jsp*</pattern>
<pattern>/register/*</pattern>
</excludes>
<decorator name="main" page="main.jsp">
<pattern>/*</pattern>
</decorator>
</decorators>

defaultdir为装饰页面所在的文件夹.

装饰页面main.jsp,主要的页面结构布局.
代码:

<%@ page contentType="text/html;charset=utf-8" language="java"%>
[color=red]<%@ taglib uri="sitemesh-decorator" prefix="decorator"%>
<%@ taglib uri="sitemesh-page" prefix="page"%>[/color]
<%
String path = request.getContextPath();
%>
<HTML>
<HEAD>
<TITLE><decorator:title default="main page" /></TITLE>
<decorator:head />
<link rel="stylesheet" type="text/css"
href="<%=path%>/css/default.css" />
<link rel="stylesheet" type="text/css" href="<%=path%>/css/tab.css" />
<script language="javascript" src="<%=path%>/js/formControl.js"></script>
<script language="javascript" src="<%=path%>/js/changePage.js"></script>
<META http-equiv=ImageToolbar content=no>
</HEAD>
<BODY id=main>
<jsp:include flush="true" page="/commont/header.jsp"></jsp:include>
<DIV id=container>
<DIV id=content style="height:500px">
<decorator:body /> <DIV id=navigation>
<A accessKey=3 name=menu></A>
<H2 class=hide>
Navigation
</H2>
<UL id=menuroot>
<LI>
<A title="index" accessKey=1 href="<%=path%>/index.jsp">Index</A>
</LI>
<LI>
<A title="ListUser" accessKey=3
href="<%=path%>/user/listUsers.action">ListUser</A>
</LI>
<LI>
<A title="listWorkSum" accessKey=4
href="<%=path%>/worksum/listWorkSums.action">listWorkSum</A>
</LI>
<LI>
<A title="ListUser" accessKey=3
href="<%=path%>/clickstream/clickstreams.jsp">ClickStream</A>
</LI>
<LI>
<A title="monitor" accessKey=6
href="<%=path%>/monitor/jamonadmin.jsp">monitor</A>
</LI>
<LI>
<A title="workflow" accessKey=6
href="<%=path%>/workflow/default.jsp">workflow</A>
</LI>
<LI>
<A title="workflow" accessKey=4
href="<%=path%>/workflow/workflowLogin.action">workflowAction</A>
</LI>
<LI>
<A title="soap" accessKey=6
href="<%=path%>/soap/default.jsp">soap</A>
</LI>
<LI>
<A title="Logout" accessKey=5 href="<%=path%>/logout.jsp">Logout</A>
</LI>
</UL>
</DIV>
</DIV>
<DIV id=header>
Copyright © 2003-2005 cherubo All Rights Reserved
</DIV>
<jsp:include page="/commont/footer.jsp" />
</BODY>
</HTML>

上面页面
以下列着全部标签： Decorator Tags Page Tags
被用于建立装饰器页面. 被用于从原始内容页面访问装饰器.
<decorator:head />
<decorator:body />
<decorator:title />
<decorator:getProperty />
<decorator:usePage />
<page:applyDecorator />
<page:param 　
<decorator:head />
插入原始页面(被包装页面)的head标签中的内容(不包括head标签本身)。
<decorator:body />
插入原始页面(被包装页面)的body标签中的内容。
<decorator:title [ default="..." ] />
插入原始页面(被包装页面)的title标签中的内容，还可以添加一个缺省值。

被修饰的页面