解答例 - 実習課題1 - 21.表示するTileの動的な変更
(実習課題1)
前章の実習課題3を改良しなさい。
- Controllerクラスを作成し、Controllerクラスでメニューおよびタイトルのリストを設定するようにすること。
解答例
▼ディレクトリ構成は以下の通り
. └─WEB-INF web.xml,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 │ └─exercise1 MenuController.class ├─JSP │ └─com │ └─techscore │ └─struts │ └─chapter21 │ └─exercise1 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,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
/** * MenuController.java TECHSCORE Java JakartaStruts 21章 * * Copyright (c) 2004 Four-Dimensional Data, Inc. * */ package com.techscore.struts.chapter21.exercise1; import org.apache.struts.tiles.Controller; import org.apache.struts.tiles.ComponentContext; import org.apache.struts.tiles.beans.SimpleMenuItem; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.ServletContext; import java.util.List; import java.util.ArrayList; public class MenuController implements Controller { public void perform(ComponentContext context, HttpServletRequest request, HttpServletResponse response, ServletContext servletContext) { //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/execise1/calendar.jsp"); menu.setValue("カレンダー"); menuList.add(menu); menu = new SimpleMenuItem(); menu.setLink("/WEB-INF/JSP/com/techscore/struts/chapter21/execise1/clock.jsp"); menu.setValue("世界時計"); menuList.add(menu); menu = new SimpleMenuItem(); menu.setLink("/WEB-INF/JSP/com/techscore/struts/chapter21/execise1/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); } }
<!-- calendar.jsp --> <!-- TECHSCORE Java JakartaStruts 21章 実習課題1 --> <!-- 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1 --> <!-- 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1 --> <!-- 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1 --> <!-- 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1 --> <!-- 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/exercise1/calendar.jsp" /> </logic:equal> <logic:equal parameter="contentID" value="1"> <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/clock.jsp" /> </logic:equal> <logic:equal parameter="contentID" value="2"> <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/weather.jsp" /> </logic:equal> <logic:greaterEqual parameter="contentID" value="3"> <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/calendar.jsp" /> </logic:greaterEqual> <logic:notPresent parameter="contentID"> <tiles:insert page="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/calendar.jsp" /> </logic:notPresent>
▼original.tld
<?xml version="1.0" ?> <!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd"> <taglib> <tlib-version>1.0</tlib-version> <jsp-version>1.2</jsp-version> <short-name>original tags</short-name> <tag> <name>Calendar</name> <tag-class>com.techscore.struts.chapter20.exercise1.CalendarTag</tag-class> <body-content>empty</body-content> <attribute> <name>year</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>month</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
▼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/exercise1/CalendarPlus" forward="calendarPlus211" /> </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="calendarPlus211" path="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/calendarPlus.jsp" controllerClass="com.techscore.struts.chapter21.exercise1.MenuController"> <put name="content" value="/WEB-INF/JSP/com/techscore/struts/chapter21/exercise1/content.jsp"/> </definition> </tiles-definitions>
<?xml version="1.0" encoding="Windows-31J" ?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd"> <!-- Copyright (c) 2002 by ObjectLearn. All Rights Reserved. --> <web-app> <filter> <filter-name>Encoding</filter-name> <filter-class>com.techscore.struts.EncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>Windows-31J</param-value> </init-param> </filter> <filter-mapping> <filter-name>Encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>Action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>6</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <taglib> <taglib-uri>http://jakarta.apache.org/struts/tags-bean</taglib-uri> <taglib-location>/WEB-INF/tld/struts-bean.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/struts/tags-html</taglib-uri> <taglib-location>/WEB-INF/tld/struts-html.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/struts/tags-logic</taglib-uri> <taglib-location>/WEB-INF/tld/struts-logic.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/struts/tags-tiles</taglib-uri> <taglib-location>/WEB-INF/tld/struts-tiles.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://www.4dd.co.jp/tags/original</taglib-uri> <taglib-location>/WEB-INF/tld/original.tld</taglib-location> </taglib> </web-app>
▼起動URLは以下の通り
WEB_ROOT/com/techscore/struts/chapter21/exercise1/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)