解答例 - 実習課題1 - 22.Tilesタグライブラリ
(実習課題1)
20章2節のWebアプリケーションを改良しなさい。
- メニューを表示する部分を、<tiles:useAttribute>タグとスクリプトだけで実現すること。
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) ├─JSP │ └─com │ └─techscore │ └─struts │ └─chapter22 │ └─exercise1 calendar.jsp,calendarPlus.jsp,clock.jsp,weather.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-bean.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
<!-- calendar.jsp --> <!-- TECHSCORE Java JakartaStruts 22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 22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" import="org.apache.struts.tiles.beans.SimpleMenuItem"%> <%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %> <html:html> <head> <!-- 表示しているコンテンツのメニュー名をタイトルにも表示する --> <title> <bean:parameter id="contentID" name="contentID" value="0" /> <tiles:importAttribute name="menuList" /> <logic:iterate id="menu" name="menuList" indexId="indexID" type="org.apache.struts.tiles.beans.SimpleMenuItem"> <logic:equal name="indexID" value="<%=contentID %>"> <bean:write name="menu" property="value" /> </logic:equal> </logic:iterate> </title> </head> <body> <table border="1" width="100%"> <tr> <!-- メニュー部分--> <td align="center" width="30%"> <h3>MENU</h3> <tiles:useAttribute name="menuList" classname="java.util.List" /> <% SimpleMenuItem menu = new SimpleMenuItem(); %> <% if(contentID != null) { %> <% for(int i=0; i<menuList.size(); i++){ %> <% menu = (SimpleMenuItem)menuList.get(i); %> <!-- parameter指定されたURLだけコンテンツ表示のために抜き出す --> <% if(menuList.indexOf(menuList.get(i)) == Integer.parseInt(contentID)) { %> <% String url = menu.getLink(); %> <% pageContext.setAttribute("url",url); %> <% } else { %> <!-- 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 --> <a href="<%=request.getRequestURL().toString() %>?contentID=<%=menuList.indexOf(menuList.get(i))%>" target="_top"><p><%= menu.getValue() %></p></a> <% } %> <% } %> <% } %> </td> <!-- コンテンツ部分--> <td align="center"> <!-- パラメータがコンテンツ数を超えていたらcontentID=0(デフォルト)で表示 --> <logic:empty name="url"> <logic:redirect href="<%=request.getRequestURL().toString() %>" /> </logic:empty> <tiles:insert beanName="url" /> </td> </tr> </table> </body> </html:html>
<!-- clock.jsp --> <!-- TECHSCORE Java JakartaStruts 22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 22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>
▼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/chapter22/exercise1/CalendarPlus" forward="calendarPlus221" /> </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="calendarPlus221" path="/WEB-INF/JSP/com/techscore/struts/chapter22/exercise1/calendarPlus.jsp" ><putList name="menuList"> <item value="カレンダー" link="/WEB-INF/JSP/com/techscore/struts/chapter22/exercise1/calendar.jsp" /> <item value="世界時計" link="/WEB-INF/JSP/com/techscore/struts/chapter22/exercise1/clock.jsp" /> <item value="天気予報" link="/WEB-INF/JSP/com/techscore/struts/chapter22/exercise1/weather.jsp" /> </putList> </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/chapter22/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)