《struts2权威指南》学习笔记之struts2+jsf+spring+sitemesh集成开发-优快云博客

本文介绍如何在Struts2框架中整合Sitemesh页面装饰器，通过配置过滤器和装饰器配置文件实现页面布局统一化。同时展示了具体的XML配置示例及装饰器页面示例。

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1.安装sitemesh插件

与整合其他框架类似，struts2与sitemesh框架的整合也使用了插件方式进行管理。将struts2-sitemesh-plugin-2.0.6.jar文件复制到WEB-INF/lib下，为了整合sitemesh框架，必须在web.xml中配置sitemesh过滤器，让该核心过滤器来过滤所有的用户请求。但我们知道，struts2的所有值一旦访问该stack context或ValueStack后，里面对应的数值将会被清除掉，如果先使用了struts2的FilterDispather来过滤用户请求，则sitemesh的过滤器将无法取得Stack context或者ValueStack中的数据
为了解决这个问题，struts2提供了ActionContextCleanUp类，在struts2的架构中，标准的过滤器一般以ActionContextCleanUp开始，后面跟着其他需要的过滤器，最后，由FilterDispatcher来处理请求，FilterDispatcher通常是将请求传递给ActionMapper
ActionContextCleanUp的一个重要作用是整合sitemesh页面装饰器，它通知FilterDispatcher在正确的时间清除ActionContext中的请求数据，所以正确的排序如下：
（1）ActionContextCleanUp过滤器
（2）SiteMesh核心过滤器
（3）FilterDispatcher过滤器

web.xml

<? xmlversion="1.0"encoding="GBK" ?>

< web-app id ="jsf" version ="2.4"

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/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >

< filter >

< filter-name > struts-cleanup </ filter-name >

< filter-class > org.apache.struts2.dispatcher.ActionContextCleanUp </ filter-class >

</ filter >

< filter >

< filter-name > sitemesh </ filter-name >

< filter-class > com.opensymphony.module.sitemesh.filter.PageFilter </ filter-class >

</ filter >

< filter >

< filter-name > struts </ filter-name >

< filter-class > org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >

</ filter >

< filter-mapping >

< filter-name > struts-cleanup </ filter-name >

< url-pattern > /* </ url-pattern >

</ filter-mapping >

< filter-mapping >

< filter-name > sitemesh </ filter-name >

< url-pattern > /* </ url-pattern >

</ filter-mapping >

< filter-mapping >

< filter-name > struts </ filter-name >

< url-pattern > /* </ url-pattern >

</ filter-mapping >

< listener >

< listener-class > org.springframework.web.context.ContextLoaderListener </ listener-class >

</ listener >

< listener >

< listener-class > org.apache.myfaces.webapp.StartupServletContextListener </ listener-class >

</ listener >

< servlet >

< servlet-name > faces </ servlet-name >

< servlet-class > javax.faces.webapp.FacesServlet </ servlet-class >

< load-on-startup > 1 </ load-on-startup >

</ servlet >

< servlet-mapping >

< servlet-name > faces </ servlet-name >

< url-pattern > *.action </ url-pattern >

</ servlet-mapping >

</ web-app >

spring配置文件

<? xmlversion="1.0"encoding="GBK" ?>

< beans xmlns ="http://www.springframework.org/schema/beans"

xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation ="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd" >

< bean id ="bs" class ="lee.service.BookService" />

</ beans >

sitemesh装饰配置文件

<? xmlversion="1.0"encoding="GBK" ?>

< decorators defaultdir ="/decorators" >

< excludes >

< pattern > /exclude.jsp </ pattern >

< pattern > /exclude/* </ pattern >

</ 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 ="main" page ="main.jsp" >

< pattern > /* </ pattern >

</ decorator >

< decorator name ="panel" page ="panel.jsp" />

</ decorators >

装饰器decorators/main.jsp

<% ... @pagecontentType="text/html;charset=GBK" %>

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

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

< html >

< head >

< title >< decorator:title default ="SiteMesh的装饰器页" /></ title >

< link href ="decorators/main.css" rel ="stylesheet" type ="text/css" >

< decorator:head />

</ head >

< body >

< table width ="100%" height ="100%" >

< tr >

< td valign ="top" >

< page:applyDecorator page ="/book.html" name ="panel" />

< page:applyDecorator page ="/link.html" name ="panel" />

</ td >

< td width ="100%" >

< table width ="100%" height ="100%" >

< tr >

< td id ="pageTitle" >

< decorator:title />

</ td >

</ tr >

< tr >

< td valign ="top" height ="100%" >

< decorator:body />

</ td >

</ tr >

< tr >

< td id ="footer" >

< b > 被包含的内容 </ b >< br >

SithMesh提供页面装饰支持

</ td >

</ tr >

</ table >

</ td >

</ tr >

</ table >

</ body >

</ html >

装饰器decorators/panel.jsp

<% ... @pagecontentType="text/html;charset=GBK" %>

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

< p >

< table width =250 border =0 cellpadding =0 cellspacing =0 >

< tr >

< th class ="panelTitle" >

< decorator:title default ="小面板页面" />

</ th >

</ tr >

< tr >

< td class ="panelBody" >

< decorator:body />

</ td >

</ tr >

</ table >

</ p >

装饰器样式decorators/main.css

body,td,p{

font:normalx-smallverdana,arial,helvetica,sans-serif;

}

.panelTitle{

background-color:#003399;

color:#eeeeee;

font-weight:bold;

border-color:#3366ff#000033#000033#3366ff;

border-width:1;

border-style:solid;

padding:1;

}

.panelBody{

background-color:#eeeeee;

border-color:black;

border-width:0111;

border-style:solid;

padding:2;

}

#pageTitle{

background-color:#003399;

color:#eeeeee;

font-weight:bold;

font-size:large;

border-color:#3366ff#000033#000033#3366ff;

border-width:1;

border-style:solid;

padding:1;

text-align:center;

}

#footer{

background-color:#eeeeee;

font-size:9pt;

text-align:center;

color:black;

border-color:#666666#cccccc#cccccc#666666;

border-width:1;

border-style:solid;

padding:1;

}

被装饰页面book.html

< html >

< head >

< title > 作者图书 </ title >

</ head >

< body >

< center >

Spring2.0宝典 < br >

轻量级J2EE企业应用实战 < br >

基于J2EE的Ajax宝典

</ center >

</ body >

</ html >

被装饰页面link.html

< html >

< head >

< title > 友情链接 </ title >

</ head >

< body >

< center >

< a href ="http://www.nit-pro.org" > NIT-PRO考试中心 </ a >< br >

< a href ="http://www.oneedu.cn" > 新东方IT培训中心 </ a >< br >

< a href ="http://www.oneedu.cn" > 东方标准人才服务公司 </ a >< br >

</ center >

</ body >

</ html >

JSF功能页面list.jsp

<% ... @pagelanguage="java"contentType="text/html;charset=GBK" %>

<% ... @taglibprefix="f"uri="http://java.sun.com/jsf/core" %>

<% ... @taglibprefix="h"uri="http://java.sun.com/jsf/html" %>

< html >

< head >

< title > Struts2+MyFaces+Spring整合 </ title >

</ head >

< body >

< f:view >

< h3 > Struts2+MyFaces+Spring整合 </ h3 >

< h3 > 列出所有图书 </ h3 >

< h:dataTable value ="#{action.allBook}" var ="b" style ="text-align:center;width:500px" border ="1" >

< h:column >

< f:facet name ="header" >

< h:outputText value ="图书ID" />

</ f:facet >

< h:outputLink value ="edit.action" >

< f:param name ="editId" value ="#{b.id}" />

< h:outputText value ="#{b.id}" />

</ h:outputLink >

</ h:column >

< h:column >

< f:facet name ="header" >

< h:outputText value ="图书名" />

</ f:facet >

< h:outputText value ="#{b.name}" />

</ h:column >

< h:column >

< f:facet name ="header" >

< h:outputText value ="图书简介" />

</ f:facet >

< h:outputText value ="#{b.desc}" />

</ h:column >

</ h:dataTable >

< p >

< h:outputLink value ="edit.action" >

< h:outputText value ="新增图书" />

</ h:outputLink >

</ p >

</ f:view >

</ body >

</ html >

JSF功能页面edit.jsp

<% ... @pagelanguage="java"contentType="text/html;charset=GBK" %>

<% ... @taglibprefix="f"uri="http://java.sun.com/jsf/core" %>

<% ... @taglibprefix="h"uri="http://java.sun.com/jsf/html" %>

< html >

< head >

< title > Struts2+MyFaces+Spring整合 </ title >

</ head >

< body >

< f:view >

< h3 > Struts2+MyFaces+Spring整合 </ h3 >

< h3 > 修改/保存图书 </ h3 >

< h:form >

< h:inputHidden value ="#{action.editId}" />

< h:panelGrid columns ="3" >

< h:outputText value ="图书ID" />

< h:inputText id ="id" size ="5" value ="#{action.currentBook.id}" required ="true" />

< h:message for ="id" />

< h:outputText value ="图书名:" />

< h:inputText id ="name" size ="30" value ="#{action.currentBook.name}" required ="true" >

< f:validateLength minimum ="2" maximum ="100" />

</ h:inputText >

< h:message for ="name" />

< h:outputText value ="图书描述：" />

< h:inputText id ="desc" size ="30" value ="#{action.currentBook.desc}" required ="true" >

< f:validateLength minimum ="2" maximum ="100" />

</ h:inputText >

< h:message for ="desc" />

</ h:panelGrid >

< h:commandButton value ="保存" action ="#{action.save}" />

< br />

</ h:form >

</ f:view >

</ body >

</ html >

struts.xml

<? xmlversion="1.0"encoding="GBK" ?>

<! DOCTYPEstrutsPUBLIC

"-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd" >

< struts >

< constant name ="struts.custom.i18n.resources" value ="messageResource" />

< constant name ="struts.i18n.encoding" value ="GBK" />

< package name ="jsf" extends ="jsf-default" >

< interceptors >

< interceptor-stack name ="jsfFullStack" >

< interceptor-ref name ="params" />

< interceptor-ref name ="basicStack" />

< interceptor-ref name ="jsfStack" />

</ interceptor-stack >

</ interceptors >

< default-interceptor-ref name ="jsfFullStack" />

</ package >

< package name ="lee" extends ="jsf" >

< action name ="list" class ="lee.action.BookAction" >

< result name ="success" type ="jsf" />

</ action >

< action name ="edit" class ="lee.action.BookAction" >

< result name ="success" type ="jsf" />

< result name ="list" type ="redirect" > list.action </ result >

</ action >

</ package >

</ struts >

BookService

package lee.service;

import java.util. * ;

import lee.model.Book;

public class BookService

... {

privateSet<Book>bookDb;

publicBookService()

...{

bookDb=newHashSet<Book>();

bookDb.add(newBook(1,"Spring2.0宝典","全面介绍了Spring各个知识点"));

bookDb.add(newBook(2,"轻量级J2EE企业应用实战","介绍实际企业的J2EE开发过程"));

}

publicSet<Book>getAllBook()

...{

returnbookDb;

}

publicBookgetBookById(intid)

...{

for(Bookb:bookDb)

...{

if(b.getId()==id)

...{

returnb;

}

returnnull;

}

publicvoidaddBook(Bookb)

...{

bookDb.add(b);

}

Book

package lee.model;

public class Book

... {

privateintid;

privateStringname;

privateStringdesc;

publicBook()

...{

}

publicBook(intid,Stringname,Stringdesc)

...{

this.id=id;

this.name=name;

this.desc=desc;

}

publicvoidsetId(intid)

...{

this.id=id;

}

publicintgetId()

...{

returnthis.id;

}

publicvoidsetName(Stringname)

...{

this.name=name;

}

publicStringgetName()

...{

returnthis.name;

}

publicvoidsetDesc(Stringdesc)

...{

this.desc=desc;

}

publicStringgetDesc()

...{

returnthis.desc;

}

publicinthashCode()

...{

returnid;

}

publicbooleanequals(Objecttarget)

...{

if(targetinstanceofBook)

...{

Bookb=(Book)target;

if(b.getId()==this.id)

...{

returntrue;

}

returnfalse;

}

BookAction

packagelee.action;

importcom.opensymphony.xwork2.ActionSupport;

importjava.util.*;

importlee.model.Book;

importlee.service.BookService;

publicclassBookActionextendsActionSupport

{

privateBookcurrentBook;

privateinteditId;

privateBookServicebs;

publicvoidsetBs(BookServicebs)

{

this.bs=bs;

}

publicvoidsetCurrentBook(BookcurrentBook)

{

this.currentBook=currentBook;

}

publicBookgetCurrentBook()

{

//如果editId请求参数不为空，则currentBook也不为空

if(editId!=0)

{

this.currentBook=bs.getBookById(editId);

}

elseif(currentBook==null)

{

currentBook=newBook();

}

returnthis.currentBook;

}

publicvoidsetEditId(inteditId)

{

this.editId=editId;

}

publicintgetEditId()

{

returnthis.editId;

}

publicList < Book > getAllBook()

{

List < Book > result=newArrayList < Book > ();

for(Bookb:bs.getAllBook())

{

result.add(b);

}

returnresult;

}

publicStringsave()

{

bs.addBook(currentBook);

return"list";

}

struts.properties

struts.i18n.encoding=gb2312
struts.objectFactory.spring.autoWire=type

如果web应用是test.,则运行

http://localhost:8080/test/list.action 则会出现如下被装饰过的页面