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解答例 - 実習課題2 - 21.表示するTileの動的な変更

(実習課題2)

実習課題1と同じ挙動をするWebアプリケーションを、TilesActionを用いて作成しなさい。

解答例

▼ディレクトリ構成は以下の通り

.
└─WEB-INF              web.xml(21章 実習課題1と同じ),struts-config.xml,tiles-defs.xml
    ├─classes
    │  └─com
    │      └─techscore
    │          └─struts       EncodingFilter.class(2章 実習課題2と同じ),
    │             │            MessageResources.properties(空ファイル)
    │             └─chapter20
    │             │   └─exercise1 CalendarTag.class(20章 実習課題1と同じ)
    │             └─chapter21         
    │                  └─exercise2 MenuTilesAction.class
    ├─JSP
    │  └─com
    │      └─techscore
    │          └─struts
    │              └─chapter21
    │                  └─exercise2 calendar.jsp,calendarPlus.jsp,clock.jsp,weather.jsp,content.jsp
    ├─lib              strutsライブラリ jarファイル
    └─tld              original.tld(20章 実習課題1と同じ)
                                       struts-tiles.tld,struts-html.tld,struts-beans.tld,struts-logic.tld



※strutsライブラリjarファイル
  struts.jar,commons-beanutils.jar,commons-collections.jar,commons-digester.jar,commons-logging.jar,jakarta-oro.jar
/**
 * MenuTilesAction.java TECHSCORE Java JakartaStruts 21章
 * 
 * Copyright (c) 2004 Four-Dimensional Data, Inc.
 *  
 */

package com.techscore.struts.chapter21.exercise2;

import org.apache.struts.tiles.actions.TilesAction;
import org.apache.struts.tiles.ComponentContext;
import org.apache.struts.tiles.beans.SimpleMenuItem;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.ArrayList;

public class MenuTilesAction extends TilesAction {

    public ActionForward execute(ComponentContext context,
                                 ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) throws Exception {

        //メニューリストの作成
        List menuList = new ArrayList();
        SimpleMenuItem menu = new SimpleMenuItem();
        menu.setLink("/WEB-INF/JSP/com/techscore/struts/chapter21/execise2/calendar.jsp");
        menu.setValue("カレンダー");
        menuList.add(menu);
        menu = new SimpleMenuItem();
        menu.setLink("/WEB-INF/JSP/com/techscore/struts/chapter21/execise2/clock.jsp");
        menu.setValue("世界時計");
        menuList.add(menu);
        menu = new SimpleMenuItem();
        menu.setLink("/WEB-INF/JSP/com/techscore/struts/chapter21/execise2/weather.jsp");
        menu.setValue("天気予報");
        menuList.add(menu);

        //メニューリストの登録
        context.putAttribute("menuList", menuList);

        //タイトルリストの作成
        List titleList = new ArrayList();
        titleList.add("Calendar");
        titleList.add("Clock");
        titleList.add("Weather");

        //タイトルリストの登録
        context.putAttribute("titleList", titleList);

        return null;
    }

}
<!-- calendar.jsp -->
<!-- TECHSCORE Java JakartaStruts 21章 実習課題2 -->
<!-- Copyright (c) 2004 Four-Dimensional Data, Inc. -->

<%@ page pageEncoding="Windows-31J"
         import="java.util.Calendar" %>

<%@ taglib uri="http://www.4dd.co.jp/tags/original"
    prefix="original" %>

<h2 align="center">カレンダー</h2>

<% Calendar calendar = Calendar.getInstance(); %>

<original:Calendar year="<%=Integer.toString(calendar.get(Calendar.YEAR)) %>"
                   month="<%=Integer.toString(calendar.get(Calendar.MONTH) + 1) %>" />
<!-- calendarPlus.jsp -->
<!-- TECHSCORE Java JakartaStruts 21章 実習課題2 -->
<!-- Copyright (c) 2004 Four-Dimensional Data, Inc. -->

<%@ page contentType="text/html; charset=Windows-31J"
         session="false" 
         pageEncoding="Windows-31J" %>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles"
           prefix="tiles" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic"
           prefix="logic" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean"
           prefix="bean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html"
           prefix="html" %>

<html:html>
<head>

<!-- コンテンツ番号を読み込む -->
<bean:parameter id="contentID" name="contentID" value="0" />
<tiles:importAttribute name="titleList" />
    <logic:iterate id="title" name="titleList" indexId="indexID"
                 type="java.lang.String">
        <logic:equal name="indexID" value="<%=contentID %>">
            <title><bean:write name="title"/></title>
        </logic:equal>
    </logic:iterate>

</head>

<body>

<table border="1" width="100%">
	<tr>
	    <!-- メニュー部分-->
	    <td align="center" width="30%">
            <h3>MENU</h3>
            <tiles:importAttribute name="menuList" />
            <logic:iterate id="menu" name="menuList" indexId="indexID"
                           type="org.apache.struts.tiles.beans.SimpleMenuItem">
	              
                   <!-- 現在表示しているコンテンツ以外についてだけMENUを表示 -->
				   <logic:notEqual name="indexID" value="<%=contentID %>" >
				       <html:link href="<%=request.getRequestURL().toString() %>"
				               paramId="contentID" paramName="indexID">
				           <p><bean:write name="menu" property="value" /></p>
				       </html:link>
				   </logic:notEqual>
			</logic:iterate>
        </td>
        <!-- コンテンツ部分-->
        <td align="center">
            <tiles:insert beanName="content"/>
        </td>
    </tr>
</table>

</body>
</html:html>
<!-- clock.jsp -->
<!-- TECHSCORE Java JakartaStruts 21章 実習課題2 -->
<!-- Copyright (c) 2004 Four-Dimensional Data, Inc. -->

<%@ page pageEncoding="Windows-31J"
         import="java.text.DateFormat,
                  java.text.SimpleDateFormat,
                  java.util.Date,
                  java.util.TimeZone" %>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean"
           prefix="bean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic"
           prefix="logic" %>

<%  String[] cities = {"Japan",
 		                   "America/Los-Angeles",
 		                   "America/New_York",
 		                   "Europe/Moscow",
 		                   "Pacific/Saipan"}; %>

<h2 align="center">世界時計</h2>

<%  DateFormat dateFormat = new SimpleDateFormat("MM/dd HH:mm:ss"); %>
<table border="1" width="100%">
    <logic:iterate collection="<%=cities %>" id="city" indexId="index">
        <tr><td align="center">
                <bean:write name="city" />
            </td>
            <td align="center">
                <bean:define id="zoneName" name="city" type="java.lang.String" />
                <% dateFormat.setTimeZone(TimeZone.getTimeZone(zoneName)); %>
                <%= dateFormat.format(new Date()) %>
            </td></tr>
    </logic:iterate>
</table>
<!-- weather.jsp -->
<!-- TECHSCORE Java JakartaStruts 21章 実習課題2 -->
<!-- Copyright (c) 2004 Four-Dimensional Data, Inc. -->

<%@ page pageEncoding="Windows-31J" %>

<h2 align="center">天気予報</h2>

<table border="1" width="100%">
    <tr><td align="center">Tokyo</td><td align="center">晴れ</td></tr>
    <tr><td align="center">Los-Angeles</td><td align="center">晴れ時々曇り</td></tr>
    <tr><td align="center">New_York</td><td align="center">雨のち曇り</td></tr>
    <tr><td align="center">Moscow</td><td align="center">曇りのち晴れ</td></tr>
    <tr><td align="center">Saipan</td><td align="center">晴れのち曇り</td></tr>
</table>
<!-- content.jsp -->
<!-- TECHSCORE Java JakartaStruts 21章 実習課題2 -->
<!-- Copyright (c) 2004 Four-Dimensional Data, Inc. -->

<%@ page pageEncoding="Windows-31J" %>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles"
           prefix="tiles" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic"
           prefix="logic" %>

<logic:equal parameter="contentID" value="0">
    <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/calendar.jsp" />
</logic:equal>
<logic:equal parameter="contentID" value="1">
    <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/clock.jsp" />
</logic:equal>
<logic:equal parameter="contentID" value="2">
    <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/weather.jsp" />
</logic:equal>
<logic:greaterEqual parameter="contentID" value="3">
    <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/calendar.jsp" />
</logic:greaterEqual>
<logic:notPresent parameter="contentID">
    <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/calendar.jsp" />
</logic:notPresent>

▼struts-config.xml

<?xml version="1.0" encoding="Windows-31J" ?>
<!DOCTYPE struts-config PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
  "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">

<struts-config>

    <action-mappings>

		<action path="/com/techscore/struts/chapter21/exercise2/CalendarPlus" 
			    type="org.apache.struts.actions.ForwardAction" 
			    parameter="tilesAction212"/>
			
		<action path="/com/techscore/struts/chapter21/exercise2-1/CalendarPlus" 
			    type="com.techscore.struts.chapter21.exercise2.MenuTilesAction" 
			    parameter="tilesAction212"/>

    </action-mappings>

    <message-resources parameter="com.techscore.struts.MessageResources" />

    <plug-in className="org.apache.struts.tiles.TilesPlugin">
        <set-property property="definitions-config"
                      value="/WEB-INF/tiles-defs.xml" />
    </plug-in>

</struts-config>

▼tiles-defs.xml

<?xml version="1.0" encoding="Windows-31J" ?>
<!DOCTYPE tiles-definitions PUBLIC
  "-//Apache Software Foundation//DTD Tiles Configuration//EN"
  "http://jakarta.apache.org/struts/dtds/tiles-config_1_1.dtd">
  
<tiles-definitions>

    <definition name="calendarPlus212"
                path="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/calendarPlus.jsp"
                controllerUrl="/com/techscore/struts/chapter21/exercise2-1/CalendarPlus.do">
	    <put name="content" value="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise2/content.jsp"/>
    </definition>

</tiles-definitions>

▼起動URLは以下の通り

WEB_ROOT/com/techscore/struts/chapter21/exercise2/CalendarPlus.do

EncodingFilter.javaの参照(2章の実習課題2と同じ)

CalendarTag.javaの参照(20章の実習課題1と同じ)

original.tldの参照(20章の実習課題1と同じ)

web.xmlの参照(21章の実習課題1と同じ)


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