Posted on 2007-11-27 20:03
Magic.Yang 阅读(290)
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Java杂记
Sitemesh是一个基于页面过滤器的框架，能提高页面的重用性和可维护性，效果则类似于HTML的iframe和JSP的include语句，但是它通过过滤器读取配置文件的信息即可，不必在每个被装饰的页面去编写引用语句。
使用步骤很简单：
1、将Sitemesh的jar包（目前版本是2.3）放到/WEB-INF/lib目录下.
2、在[web-app]/WEB-INF/目录下创建decorators.xml文件：
decorators.xml
<decorators>
</decorators>
3、在[web-app]/WEB-INF/目录下创建sitemesh.xml文件：
sitemesh.xml
<sitemesh>
<property name="decorators-file" value="/WEB-INF/decorators.xml" />
<excludes file="${decorators-file}" />
<page-parsers>
<parser content-type="text/html"
class="com.opensymphony.module.sitemesh.parser.HTMLPageParser" />
<parser content-type="text/html;charset=GBK"
class="com.opensymphony.module.sitemesh.parser.HTMLPageParser" />
</page-parsers>
<decorator-mappers>
<mapper class="com.opensymphony.module.sitemesh.mapper.ConfigDecoratorMapper">
<param name="config" value="${decorators-file}" />
</mapper>
</decorator-mappers>
</sitemesh>
4、在web.xml中添加：
<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>
5、在[web-app]下面创建decorators目录，在此目录下创建几个页面（可以使用各种不同视图技术）：
main.jsp
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<html>
<head>
<decorator:head />
</head>
<body>
<div align="center">
<table width="100%" height="100%" border="0">
<tr>
<td colspan="2" valign="top">
<page:applyDecorator page="/decorators/banner.jsp" name="banner" />
</td>
</tr>
<tr>
<td width="15%">
<page:applyDecorator page="/decorators/menu.jsp" name="menu" />
</td>
<td width="85%">
<decorator:body />
</td>
</tr>
<tr>
<td colspan="2">
<page:applyDecorator page="/decorators/footer.jsp" name="footer" />
</td>
</tr>
</table>
</div>
</body>
</html>
menu.jsp
<html>
<head></head>
<body>
<div align="center">
This is menu.jsp
</div>
</body>
</html>
banner.jsp
<html>
<head></head>
<body>
<div align="center">
This is banner.jsp
</div>
</body>
</html>
footer.jsp
<html>
<head></head>
<body>
<div align="center">
This is footer.jsp
</div>
</body>
</html>
index.jsp
<html>
<head>
<title>index.jsp<title>
</head>
<body>
<div align="center">
This is index.jsp
</div>
</body>
</html>
7、在decorator.xml中添加：
<decorators defaultdir="/decorators">
<decorator name="main" page="main.jsp">
<pattern>/*</pattern>
</decorator>
<decorator name="banner" page="banner.jsp"/>
<decorator name="menu" page="menu.jsp"/>
<decorator name="footer" page="footer.jsp"/>
</decorators>
<excludes>
<pattern>/login.jsp</pattern>
</excludes>