siteMesh使用参考
创建一个Web应用程序，这里我创建一个名为myapp的Web应用程序；
复制sitemesh-2.2.1.jar文件到{myapp}/WEB-INF/lib目录下；
编辑{myapp}/WEB-INF/web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<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>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
index.jsp
</welcome-file>
</welcome-file-list>
</web-app>
添加蓝色高亮部分。
在{myapp}/WEB-INF/目录下创建decorators.xml文件，并且输入一下内容
<?xml version="1.0" encoding="ISO-8859-1"?>
<decorators defaultdir="/decorators">
<decorator name="main" page="main.jsp">
<pattern>/*</pattern>
</decorator>
<decorator name="panel" page="panel.jsp"/>
<decorator name="printable" page="printable.jsp"/>
</decorators>
安装完毕。
例子1
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator1" page="mydecorator1.jsp">
<pattern>/test1.jsp</pattern>
</decorator>
在{myapp}/decorators目录下添加mydecorator1.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<p>This message is in /decorators/mydecorator1.jsp</p>
</body>
</html>
在{myapp}目录下添加test1.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test1</title>
</head>
<body>
<b>This is test1</b>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test1.jsp，将会出现一下内容：
This is test1
This message is in /decorators/mydecorator1.jsp
例子2 (decorator:getProperty tag)
有时候，我们期望修改页面中某个有固定标记的片段，例如我们的jsp中有一个标记<mytag>...</mytag>，此时可以用如下方法实现：
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator2" page="mydecorator2.jsp">
<pattern>/test2.jsp</pattern>
</decorator>
在{myapp}/decorators目录下添加mydecorator2.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<!-- do nothing -->
<decorator:getProperty property="page.content3"/>
<p>This message is in /decorators/mydecorator2.jsp</p>
</body>
</html>
在{myapp}目录下添加test2.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test2</title>
</head>
<body>
<b>This is test2</b>
<b>Use <decorator:getProperty> tag</b>
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
<content tag="content4"><p>This is content4, it shouldn't be display</p></content>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test2.jsp，将会出现一下内容：
This is test2
Use <decorator:getProperty> tag
This is content1
This is content2
This message is in /decorators/mydecorator2.jsp
例子3 (page:applyDecorator tag)
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator3" page="mydecorator3.jsp">
<pattern>/test3.jsp</pattern>
</decorator>
<decorator name="mydecorator31" page="mydecorator31.jsp">
</decorator>
在{myapp}/decorators目录下添加mydecorator3.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<page:applyDecorator name="mydecorator31">
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
</page:applyDecorator>
</body>
</html>
在{myapp}/decorators目录下添加mydecorator31.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<p><i>begin</i></>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<p><i>end</i></>
在{myapp}目录下添加test3.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test3</title>
</head>
<body>
<b>This is test3</b>
<b>Use <page:applyDecorator> tag</b>
</body>
</html>
注意：相对于例子2，这里已经没有了<content tag="XXX"/>标签。
打开浏览器，访问http://localhost:8080/myapp/test3.jsp，将会出现一下内容：
This is test3
Use <page:applyDecorator> tag
begin
This is content1
This is content2
end
这里，我在mydecorator3.jsp中应用了mydecorator31.jsp的的decorator，并且将原来在test2.jsp中的 <content />标签复制到mydecorator3.jsp中，此时对于<content tag="xxx"/>的标签将会由mydecorator31.jsp了装饰。
例子4 (page:param tag)
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator4" page="mydecorator4.jsp">
<pattern>/test4.jsp</pattern>
</decorator>
<decorator name="mydecorator41" page="mydecorator41.jsp">
</decorator>
在{myapp}/decorators目录下添加mydecorator4.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<page:applyDecorator name="mydecorator41" >
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
<page:param name="page.content1"><p>This content1 has been replaced</p></page:param>
</page:applyDecorator>
</body>
</html>
在{myapp}/decorators目录下添加mydecorator41.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<p><i>begin</i></>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<p><i>end</i></>
在{myapp}目录下添加test4.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test4</title>
</head>
<body>
<b>This is test4</b>
<b>Use <page:param> tag</b>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test4.jsp，将会出现一下内容：
This is test4
Use <page:param> tag
begin
This content1 has been replaced
This is content2
end
这里，我在mydecorator4.jsp中应用了mydecorator41.jsp的的decorator，并且添加了<page:param name="page.content1">标签，那么此时页面上将会用<page:param>标签中的内容替换原来在<decorator:getProperty property="page.content1"/>中的内容，因此页面将不在“This is content1”而显示“This content1 has been replaced”。
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/kongxx/archive/2007/05/13/1606901.aspx
复制sitemesh-2.2.1.jar文件到{myapp}/WEB-INF/lib目录下；
编辑{myapp}/WEB-INF/web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<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>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
index.jsp
</welcome-file>
</welcome-file-list>
</web-app>
添加蓝色高亮部分。
在{myapp}/WEB-INF/目录下创建decorators.xml文件，并且输入一下内容
<?xml version="1.0" encoding="ISO-8859-1"?>
<decorators defaultdir="/decorators">
<decorator name="main" page="main.jsp">
<pattern>/*</pattern>
</decorator>
<decorator name="panel" page="panel.jsp"/>
<decorator name="printable" page="printable.jsp"/>
</decorators>
安装完毕。
例子1
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator1" page="mydecorator1.jsp">
<pattern>/test1.jsp</pattern>
</decorator>
在{myapp}/decorators目录下添加mydecorator1.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<p>This message is in /decorators/mydecorator1.jsp</p>
</body>
</html>
在{myapp}目录下添加test1.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test1</title>
</head>
<body>
<b>This is test1</b>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test1.jsp，将会出现一下内容：
This is test1
This message is in /decorators/mydecorator1.jsp
例子2 (decorator:getProperty tag)
有时候，我们期望修改页面中某个有固定标记的片段，例如我们的jsp中有一个标记<mytag>...</mytag>，此时可以用如下方法实现：
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator2" page="mydecorator2.jsp">
<pattern>/test2.jsp</pattern>
</decorator>
在{myapp}/decorators目录下添加mydecorator2.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<!-- do nothing -->
<decorator:getProperty property="page.content3"/>
<p>This message is in /decorators/mydecorator2.jsp</p>
</body>
</html>
在{myapp}目录下添加test2.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test2</title>
</head>
<body>
<b>This is test2</b>
<b>Use <decorator:getProperty> tag</b>
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
<content tag="content4"><p>This is content4, it shouldn't be display</p></content>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test2.jsp，将会出现一下内容：
This is test2
Use <decorator:getProperty> tag
This is content1
This is content2
This message is in /decorators/mydecorator2.jsp
例子3 (page:applyDecorator tag)
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator3" page="mydecorator3.jsp">
<pattern>/test3.jsp</pattern>
</decorator>
<decorator name="mydecorator31" page="mydecorator31.jsp">
</decorator>
在{myapp}/decorators目录下添加mydecorator3.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<page:applyDecorator name="mydecorator31">
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
</page:applyDecorator>
</body>
</html>
在{myapp}/decorators目录下添加mydecorator31.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<p><i>begin</i></>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<p><i>end</i></>
在{myapp}目录下添加test3.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test3</title>
</head>
<body>
<b>This is test3</b>
<b>Use <page:applyDecorator> tag</b>
</body>
</html>
注意：相对于例子2，这里已经没有了<content tag="XXX"/>标签。
打开浏览器，访问http://localhost:8080/myapp/test3.jsp，将会出现一下内容：
This is test3
Use <page:applyDecorator> tag
begin
This is content1
This is content2
end
这里，我在mydecorator3.jsp中应用了mydecorator31.jsp的的decorator，并且将原来在test2.jsp中的 <content />标签复制到mydecorator3.jsp中，此时对于<content tag="xxx"/>的标签将会由mydecorator31.jsp了装饰。
例子4 (page:param tag)
在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator
<decorator name="mydecorator4" page="mydecorator4.jsp">
<pattern>/test4.jsp</pattern>
</decorator>
<decorator name="mydecorator41" page="mydecorator41.jsp">
</decorator>
在{myapp}/decorators目录下添加mydecorator4.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<html>
<head>
<title>My Site - <decorator:title default="Welcome!" /></title>
<decorator:head />
</head>
<body>
<decorator:body />
<page:applyDecorator name="mydecorator41" >
<content tag="content1"><p>This is content1</p></content>
<content tag="content2"><p>This is content2</p></content>
<page:param name="page.content1"><p>This content1 has been replaced</p></page:param>
</page:applyDecorator>
</body>
</html>
在{myapp}/decorators目录下添加mydecorator41.jsp文件，内容如下:
<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>
<p><i>begin</i></>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
<p><i>end</i></>
在{myapp}目录下添加test4.jsp文件，内容如下：
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>This is test4</title>
</head>
<body>
<b>This is test4</b>
<b>Use <page:param> tag</b>
</body>
</html>
打开浏览器，访问http://localhost:8080/myapp/test4.jsp，将会出现一下内容：
This is test4
Use <page:param> tag
begin
This content1 has been replaced
This is content2
end
这里，我在mydecorator4.jsp中应用了mydecorator41.jsp的的decorator，并且添加了<page:param name="page.content1">标签，那么此时页面上将会用<page:param>标签中的内容替换原来在<decorator:getProperty property="page.content1"/>中的内容，因此页面将不在“This is content1”而显示“This content1 has been replaced”。
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/kongxx/archive/2007/05/13/1606901.aspx