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SiteMesh参考

發布時間：2023/12/10 编程问答 45 豆豆

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SiteMesh參考

作者：kongxx (kongxx@gmail.com)

安裝

首先從sitemesh下載安裝包，這里使用的是2.2.1版本。

創建一個Web應用程序，這里我創建一個名為myapp的Web應用程序；

復制sitemesh-2.2.1.jar文件到{myapp}/WEB-INF/lib目錄下；

編輯{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>

添加藍色高亮部分。

在{myapp}/WEB-INF/目錄下創建decorators.xml文件，并且輸入一下內容

<?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>

安裝完畢。

例子1

在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator

在{myapp}/decorators目錄下添加mydecorator1.jsp文件，內容如下:

在{myapp}目錄下添加test1.jsp文件，內容如下：

打開瀏覽器，訪問http://localhost:8080/myapp/test1.jsp，將會出現一下內容：

This is test1

This message is in /decorators/mydecorator1.jsp

例子2 (decorator:getProperty tag)

有時候，我們期望修改頁面中某個有固定標記的片段，例如我們的jsp中有一個標記<mytag>...</mytag>，此時可以用如下方法實現：

在{myapp}/WEB-INF/decorators.xml文件中添加以下decorator

在{myapp}/decorators目錄下添加mydecorator2.jsp文件，內容如下:

<%@ 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"/>
???????
??????? 
??????? <decorator:getProperty property="page.content3"/>
???????
??????? This message is in /decorators/mydecorator2.jsp
??? </body>
</html>

在{myapp}目錄下添加test2.jsp文件，內容如下：

<%@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>
??? This is test2
??? Use <decorator:getProperty> tag
???
??? <content tag="content1">This is content1</content>
??? <content tag="content2">This is content2</content>
??? <content tag="content4">This is content4, it shouldn't be display</content>
??? </body>
</html>

打開瀏覽器，訪問http://localhost:8080/myapp/test2.jsp，將會出現一下內容：

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目錄下添加mydecorator3.jsp文件，內容如下:

<%@ 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">This is content1</content>
??????????? <content tag="content2">This is content2</content>
??????? </page:applyDecorator>
??? </body>
</html>

在{myapp}/decorators目錄下添加mydecorator31.jsp文件，內容如下:

<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>

begin</>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
end</>

在{myapp}目錄下添加test3.jsp文件，內容如下：

注意：相對于例子2，這里已經沒有了<content tag="XXX"/>標簽。

打開瀏覽器，訪問http://localhost:8080/myapp/test3.jsp，將會出現一下內容：

This is test3

Use <page:applyDecorator> tag

begin

This is content1

This is content2

end

這里，我在mydecorator3.jsp中應用了mydecorator31.jsp的的decorator，并且將原來在test2.jsp中的 <content />標簽復制到mydecorator3.jsp中，此時對于<content tag="xxx"/>的標簽將會由mydecorator31.jsp了裝飾。

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目錄下添加mydecorator4.jsp文件，內容如下:

<%@ 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">This is content1</content>
??????????? <content tag="content2">This is content2</content>
??????????? <page:param name="page.content1">This content1 has been replaced</page:param>
??????? </page:applyDecorator>
??? </body>
</html>

在{myapp}/decorators目錄下添加mydecorator41.jsp文件，內容如下:

<%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %>
<%@ taglib uri="http://www.opensymphony.com/sitemesh/page" prefix="page" %>

begin</>
<decorator:getProperty property="page.content1"/>
<decorator:getProperty property="page.content2"/>
end</>

在{myapp}目錄下添加test4.jsp文件，內容如下：

打開瀏覽器，訪問http://localhost:8080/myapp/test4.jsp，將會出現一下內容：

This is test4

Use <page:param> tag

begin

This content1 has been replaced

This is content2

end

這里，我在mydecorator4.jsp中應用了mydecorator41.jsp的的decorator，并且添加了<page:param name="page.content1">標簽，那么此時頁面上將會用<page:param>標簽中的內容替換原來在<decorator:getProperty property="page.content1"/>中的內容，因此頁面將不在“This is content1”而顯示“This content1 has been replaced”。 ?

轉載于:https://www.cnblogs.com/wdpp/archive/2007/05/13/2386403.html