Sitemesh应用
1.加入包
sitemesh-2.3.jar
2.在web.xml中配置过滤器
<!-- SiteMesh的过滤器配置信息 开始 -->
<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>
<!-- SiteMesh的过滤器配置信息 结束 -->
3.在web-info下建立文件decorators.xml，文件例如
<?xml version="1.0" encoding="UTF-8"?>
<decorators defaultdir="/decorators">
<!-- 在excludes元素下指定的页面将不会由SiteMesh来装饰 -->
<excludes>
<pattern>/login.jsp</pattern>
<pattern>/js/*</pattern>
<pattern>/images/*</pattern>
<pattern>/decorators/*</pattern>
ajax等异步请求要写在这里
</excludes>
<!-- 创建一个名为main的装饰器，该装饰器页面为main.jsp,
用于装饰pattern指定的URL的所有页面-->
<decorator name="admin" page="admin/admin.jsp">
<pattern>/admin/welcome.action</pattern>
<pattern>/admin/pubinfo/*</pattern>
</decorator>
<decorator name="index" page="index/index.jsp">
<pattern>/index/classify/index*</pattern>
</decorator>
</decorators>
4.在web-info下建立文件sitemesh.xml，文件例如
<sitemesh>
<property name="decorators-file" value="/WEB-INF/decorators.xml" />
<excludes file="${decorators-file}" />
<!-- Page Parsers ：负责读取stream的数据到一个Page对象中以被SiteMesh解析和操作。-->
<page-parsers>
<parser default="true"
class="com.opensymphony.module.sitemesh.parser.DefaultPageParser" />
<parser content-type="text/html"
class="com.opensymphony.module.sitemesh.parser.FastPageParser" />
<parser content-type="text/html;charset=utf-8"
class="com.opensymphony.module.sitemesh.parser.FastPageParser" />
</page-parsers>
<decorator-mappers>
<!-- 可打印的装饰器，可以允许你当用http://localhost/test.html?printable=true方式访问时给出原始页面以供打印 -->
<!-- 其中printable1 与 decorators.xml中的装饰器printable1一致进行映射,若不添加此段,默认为printable -->
<mapper
class="com.opensymphony.module.sitemesh.mapper.PrintableDecoratorMapper">
<param name="decorator" value="printable1" />
<param name="parameter.name" value="printable" />
<param name="parameter.value" value="true" />
</mapper>
<mapper
class="com.opensymphony.module.sitemesh.mapper.ConfigDecoratorMapper">
<param name="config" value="${decorators-file}" />
</mapper>
</decorator-mappers>
</sitemesh>
由sitemesh.xml内容首行知道，decorators.xml是由sitemesh.xml关也就是说上面新建的 decorators.xml的位置和文件名是可以更改的，在更改之后，需要在sitemesh.xml更改其对应的路径。现在可以这样认为 sitemesh.xml只是为加载decorators.xml，只了decorators.xml可以变，其它内容都是固定的。
那sitemesh.xml又是由谁来加载的？很容易想到，sitemesh.xml可能像struts,spring等配置文件一样是在 web.xml中加载的。但是其实不是这样的。Sitemesh.xml文件的位置和文件名是固定的，也就是说sitemesh.xml的加载过程被 sitemesh jar包封装起来了。那web.xml中就不需要配置sitemesh相关内容了？也不是，sitemesh的原理是拦截请求和响应，在java web中有一个接口是专门弄这东西的。对，就是Filter(过滤器)。我们要在web.xml中加上sitemesh过滤器。
5.建立对应的模板main.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator"
prefix="decorator"%>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page"%>
<%@include file="../frame/taglib.jsp"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title><decorator:title default="IP复用系统" /></title>
<link rel="stylesheet" type="text/css"
href="<%=basePath%>css/style.css">
<link rel="stylesheet" type="text/css"
href="<%=basePath%>css/calendar-win2k-cold-1.css">
<script type="text/javascript" src="${pageContext.request.contextPath }/js/IEFirefox.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/zDialog.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/zDrag.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-1.3.2.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/calendar.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/calendar-setup.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery.cookie.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/calendar-zh.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/floatDiv.js"></script>
<script type="text/javascript">
function switchSysBar(){
if (document.getElementById("left").style.display=="")
{
document.getElementById("img1").src="<%=basePath%>images/main_30_1.gif";
document.getElementById("left").style.display="none";
document.getElementById("right").style.width="100%" ;
}
else
{
document.getElementById("img1").src="<%=basePath%>images/main_30.gif";
document.getElementById("left").style.display="" ;
document.getElementById("right").style.width="95%";
}
}
</script>
<decorator:head />
</head>
<body id="body" style="" >
<!-- 判断是否用户session状态 -->
<c:if test="${empty logdata_session_login_user}">
<script type="text/javascript">
window.location="<%=basePath%>login.jsp";
</script>
</c:if>
<div id="body" style="">
<table width="100%" height="100%" border="0" cellpadding="0"
cellspacing="0" class="cont_tab" >
<tr>
<td colspan="3">
<!--头部信息开始 -->
<div id="header">
<jsp:include page="top.jsp" flush="true" />
<!--头部信息结束 -->
</div>
</td>
</tr>
<tr>
<td id="left" width="" valign="top">
<jsp:include page="left.jsp" flush="true" />
</td>
<td height="100%" width="1px" background="<%=basePath%>images/main_27.gif" style="background-repeat: repeat-y;">
<img title="打开/关闭菜单" src="<%=basePath%>images/main_30.gif"
name="img1" width="4" style="cursor:pointer;" height="47" id=img1
onclick="switchSysBar();"/>
</td>
<td valign="top" width="95%" style="padding-right: 7px;" id="right">
<table width="100%" height="100%" border="0" cellpadding="0"
cellspacing="0" >
<tr>
<td>
<table width="100%" height="100%" border="0" cellpadding="0"
cellspacing="0" >
<tr >
<td width="100%" align="left" valign="top" style="">
<decorator:body />
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="3">
<div id="footer"><jsp:include page="down.jsp" flush="true" /></div>
</td>
</tr>
</table>
</div>
</body>
</html>