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Tapestry入门及进阶二

艾国安
2023-12-01
下面来谈谈Tapestry的开发流程。
Tapestry的开发主要有两种:一种是控件的开发,一种是页面的开发,其实页面也可以被看成控件。

以我的工程为例,我的控件全放在com.ht.components下
以我的ToolBar为例,
我的ToolBar控件放在com.ht.components.toolbar下
下面有
IToolItemDescirption.java
IToolItemListener.java
SimpleToolItemDescription.java
ToolBar_en_US.properties
ToolBar_zh_CN.properties
ToolBar.html
ToolBar.jwc
ToolItem.html
ToolItem.java
ToolItem.jwc

因为我是这样设计的,一个ToolBar包括一些ToolItem项,每个ToolItem的数据由一个
IToolItemDescription来提供.

一个控件XXX的通常组成为
一个XXX.java文件
一个XXX.jwc文件
一个XXX.html文件(当然html也可以不要,一个控件的render完全交给XXX.java去实现也是可行的)
可选的为
XXX._en_US_properties(对应的美国英语字符资源文件)
XXX._zh_CN_properties(对应的中国大陆字符资源文件)
XXX.xxx_properties(你还可以添加其他的local字符资源文件,只要xxx是合法的locale)

我的例程实现:

package com.ht.components.toolbar;

/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author Hery Tang
* @version 1.0
*/
import org.apache.tapestry.IAsset;

public interface IToolItemDescription {
   public IToolItemListener getToolItemListener();
   public IAsset getAsset();
   public IAsset getDisabledAsset();
   public String getLabel();
   public String getActionType();
   public boolean isSeparator();
   public boolean isEnable();
}

package com.ht.components.toolbar;

/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author Hery Tang
* @version 1.0
*/
import org.apache.tapestry.IPage;

public interface IToolItemListener {
  public void actionPerformed();
}

package com.ht.components.toolbar;

/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author Hery Tang
* @version 1.0
*/
import org.apache.tapestry.IAsset;

public class SimpleToolItemDescription implements IToolItemDescription{
  private IToolItemListener toolItemListener;
  private IAsset enabledAsset;
  private IAsset disabledAsset;
  private String label;
  private String actionType;
  private boolean isSeparator;
  private boolean isEnable;
  public SimpleToolItemDescription() {
    isEnable = true;
    isSeparator = false;
  }

  public IToolItemListener getToolItemListener() {
    return toolItemListener;
  }
  public void setToolItemListener(IToolItemListener listener) {
    toolItemListener = listener;
  }

  public IAsset getAsset() {
    return enabledAsset;
  }

  public void setAsset(IAsset asset) {
    this.enabledAsset = asset;
  }
  public IAsset getDisabledAsset() {
    return disabledAsset;
  }
  public void setDisabledAsset(IAsset asset) {
    this.disabledAsset = asset;
  }

  public String getLabel() {
    return label;
  }

  public void setLabel(String label) {
    this.label = label;
  }

  public void setActionType(String actionType) {
    this.actionType = actionType;
  }
  public String getActionType() {
    return actionType;
  }
 
  public boolean isSeparator() {
    return isSeparator;
  }
 
  public void setIsSeparator(boolean value) {
    isSeparator = value;
  }
 
  public boolean isEnable() {
    return isEnable;
  }
 
  public void setIsEnable(boolean value) {
    isEnable = value;
  }

}

ToolBar_en_US.properties
ToolBar_zh_CN.properties
暂时为空,我没有需要国际化的字符资源

ToolBar.html

<span jwcid="$content$">
<table width="100%" border="0" cellpadding="0" cellspacing="1">
        <tr>
                <span jwcid="@Conditional" condition="ognl:!isAlignLeft">
                        <td align="right">
                <table border="0" cellpadding="0" cellspacing="0">
                                        <tr>
                                                <span jwcid="@Foreach" source="ognl:toolItemDescriptions" value="ognl:currentToolItemDesc">
                                                                  <td>
                                                                          <span jwcid="@ToolItem" description="ognl:currentToolItemDesc"/>
                                                                  </td>
                                                                  <td width="10">
                                                                          &nbsp;
                                                                  </td>

                                                    </span>
                                            </tr>
                                    </table>
                            </td>
    </span>
    <span jwcid="@Conditional" condition="ognl:isAlignLeft">
        <td align="left">
                                <table border="0" cellpadding="0" cellspacing="0">
                                        <tr>
                                                <span jwcid="@Foreach" source="ognl:toolItemDescriptions" value="ognl:currentToolItemDesc">
                                                                <td>
                                                                        <span jwcid="@ToolItem" description="ognl:currentToolItemDesc"/>
                                                                </td>
                                                                <td width="10">
                                                                        &nbsp;
                                                                </td>
                                                       </span>
                                              </tr>
                                    </table>
            </td>
    </span>
            </tr>
</table>
</span>

ToolBar.java
package com.ht.components.toolbar;

import org.apache.tapestry.BaseComponent;
import org.apache.tapestry.IRequestCycle;
import java.util.List;

/**
* Simple ArrayViewer object, for the Component chapter of the Tutorial
* @author neil clayton
*/
public abstract class ToolBar extends BaseComponent {
        private IToolItemDescription currentToolItemDesc;
        private List toolItemDescriptions;

        public IToolItemDescription getCurrentToolItemDesc() {
          return currentToolItemDesc;
        }

        public void setCurrentToolItemDesc(IToolItemDescription itemDesc) {
          this.currentToolItemDesc = itemDesc;
        }

        public List getToolItemDescriptions() {
          return toolItemDescriptions;
        }

        public void setToolItemDescriptions(List descList) {
          toolItemDescriptions = descList;
        }

        /**
         * @see net.sf.tapestry.AbstractComponent#cleanupAfterRender(IRequestCycle)
         */
        protected void cleanupAfterRender(IRequestCycle cycle) {
                currentToolItemDesc = null;
                toolItemDescriptions = null;
                super.cleanupAfterRender(cycle);
        }

        public abstract boolean getIsAlignLeft();
}

ToolBar.jwc

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE component-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>


<component-specification class="com.ht.components.toolbar.ToolBar" allow-body="no" allow-informal-parameters="yes">

    <parameter
        name="toolItemDescriptions"
        type="java.util.List"
        direction="in"
        required="yes">
    </parameter>

    <parameter name="isAlignLeft"
type="boolean"
required="no"
direction="in"/>

</component-specification>

ToolItem.html

<span jwcid="$content$">
<span jwcid="@Conditional" condition="ognl:!isSeparator">
<span jwcid="@Conditional" condition="ognl:IsEnable">
        <span jwcid="link"><img jwcid="enabledImage"/><font color="White"><span jwcid="@InsertText" value="ognl:label"/></font></span>
</span>
<span jwcid="@Conditional" condition="ognl:!IsEnable">
        <img jwcid="disabledImage"/><font color="#A0A0A0"><span jwcid="@InsertText" value="ognl:label"/></font>
</span>
</span>
<span jwcid="@Conditional" condition="ognl:isSeparator">
<img jwcid="@Image" image="ognl:enabledImage"/>
</span>
</span>

ToolItem .java

package com.ht.components.toolbar;

import org.apache.tapestry.BaseComponent;
import org.apache.tapestry.IBinding;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.components.Foreach;
import org.apache.tapestry.IAsset;

public class ToolItem extends BaseComponent{
  private IToolItemDescription desc;

  /**
   * @see net.sf.tapestry.AbstractComponent#cleanupAfterRender(IRequestCycle)
   */
  protected void cleanupAfterRender(IRequestCycle cycle) {
    desc = null;
    super.cleanupAfterRender(cycle);
  }

  public IToolItemDescription getDescription() {
    return desc;
  }

  public void setDescription(IToolItemDescription desc) {
    this.desc = desc;
  }
  public void excuteCurrent(IRequestCycle cycle) {
    if(desc != null) {
      IToolItemListener listener = desc.getToolItemListener();
      listener.actionPerformed();
    }
  }
  public IAsset getEnabledAsset() {
    return desc.getAsset();
  }
  public IAsset getDisabledAsset() {
    return desc.getDisabledAsset();
  }
  public String getLabel() {
    return desc.getLabel();
  }
  public boolean getIsSeparator() {
    return desc.isSeparator();
  }
  public boolean getIsEnable() {
    return desc.isEnable();
  }
}

ToolItem.jwc

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE component-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>


<component-specification class="com.ht.components.toolbar.ToolItem" allow-body="no" allow-informal-parameters="yes">

    <parameter
        name="description"
        type="com.ht.components.toolbar.IToolItemDescription"
        direction="in"
        required="yes">
    </parameter>

    <component id="link" type="LinkSubmit">
            <binding name="listener" expression="listeners.excuteCurrent"/>
    </component>

    <component id="enabledImage" type="Image">
            <binding name="image" expression="enabledAsset"/>
    </component>

<component id="disabledImage" type="Image">
            <binding name="image" expression="disabledAsset"/>
    </component>
</component-specification>

我就拿ToolBar这个控件讲:
先看ToolBar.jwc

<component-specification class="com.ht.components.toolbar.ToolBar" allow-body="no" allow-informal-parameters="yes">

这句是去说控件ToolBar对应的class为com.ht.components.toolbar.ToolBar
allow-body="no'是说这个控件不允许有body, allow-informal-parameters="yes"是说这个控件允许带非正式参数。

控件的参数有两种一种是在jwc文件里规定的,一种是没有规定,为什么会有非正式参数呢?大家知道Tapestry的控件,最后render到页面最终还是什么
<table width="100%" border="0" cellpadding="0" cellspacing="1">
   <tr>
      <td class="xxx"></td>
   </tr>
</table>
HTML的元素如table, tr, td,span等等都是可以带很多参数,如果我们的控件输出一般会
对应于一个元素,这时非正式参数就会以元素的参数输出。

<parameter
        name="toolItemDescriptions"
        type="java.util.List"
        direction="in"
        required="yes">
    </parameter>
这个说明ToolBar控件需要配制一个叫toolItemDescriptions的参数,参数类型为java.util.List,direction为in表示这个参数仅仅需要输入,不要输出,
required=yes表示这个参数是必须的,一定要提供。


    <parameter name="isAlignLeft"
type="boolean"
required="no"
direction="in"/>
意义同上。

我们再来分析一下ToolBa.html

首先这个控件的模版被一个
<span jwcid="$content$">
</span>
包围,这个是说明,只有这个区域里的内容才是有意义的,区域外的全被忽略。

然后这个控件可分为两部分,根据isAlignLeft参数决定这个ToolBar显示时是否向左靠齐
我们分析这一句
<span jwcid="@Conditional" condition="ognl:!isAlignLeft">

</span>
首先讲讲怎么使用控件,Tapestry的控件有四种:
Tapestry自己提供的有三种:
可参考:
http://jakarta.apache.org/tapestry/doc/ComponentReference/index.html

其中包括:
1 Framework Library (基础控件)
2 Contrib Library (Contributores 开发的控件)
3 WML Library   (应用在WML上的控件,主要用在移动设备,暂时不谈)

4 自己开发的控件 

在Tapestry中控件是可以由别的控件组成的,而且控件的嵌套级数不受限制,要在一个页面或一个控件中应用已开发的控件或Tapestry的提供的控件有两种方式:

一种是在控件规范文件(*.jwc)或页面规范文件(*.page)声明后再在HTML模版里使用
一种直接在HTML模版里使用.

不过这两种情况有个共同点,你都会在HTML模版发现<span jwcid="***">的字样。

第一种情况:
你看那个ToolItem.jwc
里面含有
  <component id="link" type="LinkSubmit">
            <binding name="listener" expression="listeners.excuteCurrent"/>
    </component>

    <component id="enabledImage" type="Image">
            <binding name="image" expression="enabledAsset"/>
    </component>

<component id="disabledImage" type="Image">
            <binding name="image" expression="disabledAsset"/>
    </component>

这里就是声明里三个空间,我们就看第一个,
  <component id="link" type="LinkSubmit">
            <binding name="listener" expression="listeners.excuteCurrent"/>
    </component>
 这里声明一个控件 id为link,id要是唯一的(是在同一控件名字空间里),
 type为LinkSubmit,就是指定这个控件的类型,当然如果是使用自己开发的控件,还要注意名字空间的问题,这个问题下面再谈。

 <binding name="listener" expression="listeners.excuteCurrent"/>

这句是为这个控件listener参数绑定一个值,expression=listeners.excuteCurrent
这个表达式是一个OGNL表达式,它等同于expression=this.getListeners().getListener("excuteCurrent");这里的this当然是com.ht.components.toolbar.ToolItem
所以我们察看ToolItem,会发现这个listener绑定的方法是

public void excuteCurrent(IRequestCycle cycle) {
    if(desc != null) {
      IToolItemListener listener = desc.getToolItemListener();
      listener.actionPerformed();
    }
}

现在这个控件(id=link)声明配置好了,我们再看看ToolItem.html
会发现这一段
<span jwcid="link"><img jwcid="enabledImage"/><font color="White"><span jwcid="@InsertText" value="ognl:label"/></font></span>

注意<span jwcid="link">***</span>,里面的东西暂时不管
这个<span jwcid="link">就是引用的我们刚才那个叫link的LinkSubmit控件。

第二种是直接在HTML模版里使用:

再回到前面看ToolBa.html里的那一句
<span jwcid="@Conditional" condition="ognl:!isAlignLeft">

</span>

这里就是在HTML模版里直接使用控件的例子,这里意思是使用一个类型为Conditional的控件,id忽略,Tapestry会给它自动指定一个id,如果你写成
<span jwcid="xxx@Conditional" condition="ognl:!isAlignLeft">
那么你指定了这个控件的id为xxx.
这里的condition="ognl:!isAlignLeft"就跟我们规范文件(*.jwc,*.page)里写成的
<binding name="condition" expression="!isAlignLeft"/>是一个意义。

开发好控件的管理:

  对于自己开发的控件,我们要把它管理起来,以便在以后的开发流程中使用,
我的在这里谈谈如何管理自己开发的控件的问题。具体的方法就是把它归档到一个library
里去。

比如我开发了一些控件,我就把它归档到一个叫Common.library的xml文档里去。

Common.library

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE library-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>

<library-specification>
<!-- Library Section-->
<library id="contrib" specification-path="/org/apache/tapestry/contrib/Contrib.library"/>
<library id="basic" specification-path="/com/ht/components/basic/Basic.library"/>
<!-- Add more libraries here.-->
<!-- End of Library Section-->

<component-type type="TabPanel" specification-path="tabpanel/TabPanel.jwc"/>
<component-type type="Border" specification-path="border/Border.jwc"/>
<component-type type="ToolItem" specification-path="toolbar/ToolItem.jwc"/>
    <component-type type="ToolBar" specification-path="toolbar/ToolBar.jwc"/>
<component-type type="AnchorDirect" specification-path="tree/components/AnchorDirect.jwc"/>
    <component-type type="TreeDataView" specification-path="tree/components/TreeDataView.jwc"/>
    <component-type type="TreeHeaders" specification-path="tree/components/TreeHeaders.jwc"/>
    <component-type type="TreeNodeView" specification-path="tree/components/TreeNodeView.jwc"/>
    <component-type type="TreeView" specification-path="tree/components/TreeView.jwc"/>
<component-type type="FileList" specification-path="table/FileList.jwc"/>
<component-type type="WrapInsertText" specification-path="wraptext/WrapInsertText.jwc"/>
<component-type type="HighlightInsertText" specification-path="highlight/HighlightInsertText.jwc"/>
<component-type type="DefaultTableColumnComponent" specification-path="table/DefaultTableColumnComponent.jwc"/>
<component-type type="AlignRightTableColumnComponent" specification-path="table/AlignRightTableColumnComponent.jwc"/>
<component-type type="DefaultTableColumns" specification-path="table/DefaultTableColumns.jwc"/>
</library-specification>

<libray-specification>包含两种元素
一种是library<library id="contrib" specification-path="/org/apache/tapestry/contrib/Contrib.library"/>

因为如果被归档的控件还引用到其他的被归档的控件(控件库),就必须在这里包含进来。

例外一种是
<component-type type="ToolBar" specification-path="toolbar/ToolBar.jwc"/>
就是被归档的控件项定义,这句我们应该有印象,这个控件就是我们前面讨论的ToolBar
注意这个specification-path是相对路径。
比如我的Common.library位于com.ht.components包内,而那个ToolBar.jwc位于com.ht.components.toolbar包内。

页面的开发:
我的Web Application只支持英语和简体中文,以开发Home页为例,我所需要新建的文件
为:
Home.java
Home.page
Home.properties
Home_zh_CN.properties
它们都位于com.ht.home包内,对应的目录为F:/myproject/TapestryExmaple/src/
com/ht/home

Home.html
它位于context下home目录内,对应的目录为F:/myproject/TapestryExmaple/context/home

我的例程为:
Home.java
package com.ht.home;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.tapestry.engine.AbstractEngine;
import org.apache.tapestry.html.BasePage;
import com.ht.web.PatientRecordBasePage;
import com.ht.web.PatientRecordEngine;
import com.ht.components.tabpanel.*;


/**
* @author Hery Tang
*
* Creation Date 2003-9-22
* Version 1.0
*/
public class Home extends PatientRecordBasePage {
    public void logout() {
        PatientRecordEngine engine = (PatientRecordEngine) getEngine();

        engine.logout();
    }
}

Home.page

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE page-specification PUBLIC
"-//Apache Software Foundation//Tapestry Specification 3.0//EN"
" http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>

<page-specification class="com.ht.home.Home">
<component id="border" type="common:Border">
<message-binding name="title" key="title"/>
<binding name="styleSheet" expression="assets.test"/>
</component>

<context-asset name="$template" path="home/Home.html"/>
<context-asset name="menuIcon" path="home/images/homeIcon.gif"/>
<context-asset name="test" path="home/css/test.css"/>
</page-specification>

Home_zh_CN.properties

menuText=首页
title=首页
actionListener.logout.menuText=注销

welcome=欢迎
welcomeDetail=欢迎使用web病历管理系统,这是一套基于网络的B/S结构的病历管理服务系统,功能新颖,界面友好,欢迎使用。


Home.properties

title=Home
menuText=Home
actionListener.logout.menuText=Logout

welcome=Welcome
welcomeDetail=Welcome to use Web Document Manage System.This system based on B/S network structure, it provides internal documents' management for your company. It's document directory organized as that: a department as a unit, departments can share documents each other. Meanwhile, it provides detailed document version control.   


Home.html

<span jwcid="border">
<table align="center" width="100%" height="100">
<tr>
<!-- ========================== START MID COL ======================= -->
<td VALIGN="TOP" width='100%'>
<table width='100%' cellpadding='0' cellspacing='0' border='0'>
<tr>
<td width='10'><img src='home/images/pixel.gif' width='10' height='1' alt='-'></td>
<td width='100%'><img src='home/images/welcome_head_icon.gif' ALIGN="BOTTOM" WIDTH="16" HEIGHT="16"  ALT="Welcome!">&nbsp;<font class='h2' style='color: #080c77;'><span key="welcome">Welcome</span></font></td>
<td width='10'><img src='home/images/pixel.gif' width='10' height='1' alt='-'></td>
</tr>
<tr>
<td height='5' colspan='3' valign='top'><img src='home/images/head_home_line.gif' width='254' height='5' alt='-'></td>
</tr>
<tr>
<td height='5' colspan='3' bgcolor='#ffffff'><img src='home/images/pixel.gif' width='1' height='5' alt='-'></td>
</tr>
<tr>
<td width='10' bgcolor='#ffffff'><img src='home/images/pixel.gif' width='10' height='1' alt='-'></td>
<td width='100%' bgcolor='#ffffff'>
<span key="welcomeDetail">Welcome to use Web Document Manage System.This system based on B/S network structure, it provides internal documents' management for your company. It's document directory organized as that: a department as a unit, departments can share documents each other. Meanwhile, it provides detailed document version control.</span>
</td>
<td width='10' bgcolor='#ffffff'><img src='home/images/pixel.gif' width='10' height='1' alt='-'></td>
</tr>
<tr>
<td height='5' colspan='3' bgcolor='#ffffff'><img src='home/images/pixel.gif' width='1' height='5' alt='-'></td>
</tr>
</table>
            </td>
        </tr>
    </table> 
</span>


对于页面的开发,有几个值得讨论的问题,
一 框架化的页面怎么实现
   这个很简单,你只要开发一个控件,预先定义好一个显示框架,我就是这么做的,我开发了一个叫Border的控件,然后把变动的显示作为Border可变的内容输出。
你看我的 Home.html,它被<span jwcid="border">**</span>所包围,我的Border控件负责
显示每页确定的内容,变动的则只在Border的一个预定的区域显示。

二  国际化怎么办
    Tapestry国际化非常简单,例如英文我要显示welcome,中文显示欢迎
只须这样就行:
    <span key="welcome">Welcome</span>(中间的Welcome是预览hmtl用的没有
别的意义),然后你在home.properties设定key-value对为: welcome=Welcome
在Home_zh_CN.properties设定为: welcome=欢迎,不过最后打包时你要将你的
Home_zh_CN.properties用jdk的bin目录下的native2ascii命令转化一下,不然会
显示成乱码。

我们来分析一下Home.page

<page-specification class="com.ht.home.Home">
声明本页对应的class为com.ht.home.Home
<component id="border" type="common:Border">
<message-binding name="title" key="title"/>
<binding name="styleSheet" expression="assets.test"/>
</component>
声明并配置一个Border类型的控件
<message-binding name="title" key="title"/>
指定了本页的title
binding name="styleSheet" expression="assets.test"/>
指定了本页应用的StyleSheet资源

<context-asset name="$template" path="home/Home.html"/>
指定了Home页的模版为home/Home.html
<context-asset name="menuIcon" path="home/images/homeIcon.gif"/>
声明一个context-asset(图标)
<context-asset name="test" path="home/css/test.css"/>
声明一个context-asset(Stylesheet),被上面的Border控件引用


最后讲讲划分子模块的问题:

比如我的Web Application包含两个子模快home, patientrecord,
home对应的包为com.ht.home,绝对路径为F:/myproject/TapestryExmaple/src/
com/ht/home,对应的context目录为home,绝对路径为F:/myproject/
TapestryExmaple/context/home

patientrecord对应的包为com.ht.patientrecord,绝对路径为F:/myproject/TapestryExmaple/src/com/ht/patientrecord,
对应的context目录为patientrecord,绝对路径为F:/myproject/
TapestryExmaple/context/patientrecord


home模块下的页面有
Home,Register,Login,About,PaitentRecordException,SecurityException

patientrecord模块下的页面有

Browser,Create,AddTreatment,AddExamination,AddOperation,AddOperationVisit,AddOperationVisit,AddComment

我需要将这些页面归档,所以对应home子模块有Home.libray,对应于patientrecord
有PatientRecord.library

Home.library的位于com.ht.home包下,
PatientRecord.library位于com.ht.patientrecord包下

他们分别为
Home.library

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE library-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>

<library-specification>
<!-- Library Section-->
<library id="contrib" specification-path="/org/apache/tapestry/contrib/Contrib.library"/>
<library id="common" specification-path="/com/ht/components/Common.library"/>
<!-- Add more libraries here.-->

<!-- End of Library Section-->

<page name="Home" specification-path="Home.page"/>
<page name="Register" specification-path="Register.page"/>
<page name="Login" specification-path="Login.page"/>
<page name="About" specification-path="About.page"/>
<page name="PaitentRecordException" specification-path="PRException.page"/>
<page name="SecurityException" specification-path="SecurityExceptionPage.page"/>
</library-specification>

PatientRecord.library
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE library-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>

<library-specification>
<!-- Library Section-->
<library id="contrib" specification-path="/org/apache/tapestry/contrib/Contrib.library"/>
<library id="common" specification-path="/com/ht/components/Common.library"/>
<!-- Add more libraries here.-->

<!-- End of Library Section-->

<page name="Browser" specification-path="Browser.page"/>
<page name="Create"  specification-path="Create.page"/>
<page name="AddTreatment" specification-path="AddTreatment.page"/>
<page name="AddExamination" specification-path="AddExamination.page"/>
<page name="AddOperation" specification-path="AddOperation.page"/>
<page name="AddOperationVisit" specification-path="AddOperationVisit.page"/>
<page name="AddComment" specification-path="AddComment.page"/>

</library-specification>

最后我们再看一下patientrecord.application这个Tapestry Web 应用核心配置文件:

patientrecord.application

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  " http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd>

<application name="Patient Record System" engine-class="com.ht.web.PatientRecordEngine">
  <property name="org.apache.tapestry.visit-class" value="com.ht.web.VisitorState"/>

  <property name="com.ht.home-page" value="home:Home"/>

  <!--<property name="com.ht.exception-page" value="home:PaitentRecordException"/>--> 
  <property name="com.ht.security-exception-page" value="home:SecurityExceptionPage"/>

  <!--Overrided the Home Service to let us to decide which page will be the home page-->
  <service name="home" class="com.ht.web.HomeService"/>
 
  <library id="home" specification-path="/com/ht/home/Home.library"/>
  <library id="patientrecord" specification-path="/com/ht/patientrecord/PatientRecord.library"/>
</application>

看看最后两行
<library id="home" specification-path="/com/ht/home/Home.library"/>
  <library id="patientrecord" specification-path="/com/ht/patientrecord/PatientRecord.library"/>

我们把那两个libary文件包含进来了,分别对应id为home, patientrecord
,我们要在程序里激活Home页,则只需
  得一个IRequestCycle对象cycle
  cycle.activate("home:Home");

注意“home:Home“,前一个home是library name,后一个是Page name.这是Tapestry
自定义的名字访问法则。

以上,是我开发Tapestry Web Application的一点心得体会,欢迎讨论批评.

msn:hery1977@hotmail.com
QQ:15520929


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