解答例 - 実習課題3 - 17.その他の Action クラス
(実習課題3)
以下の Web アプリケーションを、Struts を用いて作成しなさい。
- 入力フォームにはテキストボックスが 1つだけ含まれる。
- submit ボタンは [表示] と [検索] の 2つ
- 表示ボタンが押されたときは、入力された値を表示する。
- 検索ボタンが押されたときは、入力された値を Google で検索した結果ページを表示する。
解答例
▼ディレクトリ構成は以下の通り
. └─WEB-INF web.xml,struts-config.xml ├─classes │ └─com │ └─techscore │ └─struts EncodingFilter.class(2章 実習課題2と同じ), │ │ MessageResources.properties │ └─chapter17 │ └─exercise3 InputForm.class,LookupAction.class ├─JSP │ └─com │ └─techscore │ └─struts │ └─chapter17 │ └─exercise3 display.jsp,input.jsp,search.jsp ├─lib strutsライブラリ jarファイル └─tld struts-bean.tld,struts-html.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
/** * InputForm.java * TECHSCORE Java JakartaStruts 17章 実習課題3 * * Copyright (c) 2004 Four-Dimensional Data, Inc. */ package com.techscore.struts.chapter17.exercise3; import org.apache.struts.action.ActionForm; public class InputForm extends ActionForm { private String inputText = ""; public void setInputText(String inputText) { this.inputText = inputText; } public String getInputText() { return inputText; } }
/** * LookupAction.java * TECHSCORE Java JakartaStruts 17章 実習課題3 * * Copyright (c) 2004 Four-Dimensional Data, Inc. */ package com.techscore.struts.chapter17.exercise3; import org.apache.struts.actions.LookupDispatchAction; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Map; import java.util.HashMap; public class LookupAction extends LookupDispatchAction { protected Map getKeyMethodMap() { Map map = new HashMap(); map.put("button.display", "display"); map.put("button.search", "search"); return map; } public ActionForward display(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { return mapping.findForward("display"); } public ActionForward search(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { return mapping.findForward("search"); } }
<!-- input.jsp --> <!-- TECHSCORE Java JakartaStruts 17章 実習課題3 --> <!-- 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-html" prefix="html" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %> <html:html> <head><title>TECHSCORE Java JakartaStruts 17章 実習課題3</title></head> <body> <p>何か文字を入力して、どちらかのボタンを押してください。<br> 表示ボタンを押すと、入力された文字を表示します。<br> 検索ボタンを押すと、入力文字をGoogleで検索した結果が表示されます。</p> <html:form action="/com/techscore/struts/chapter17/exercise3/Input.do" method="post"> <p><html:text property="inputText" /></p> <p><html:submit property="method"> <bean:message key="button.display" /> </html:submit> <html:submit property="method"> <bean:message key="button.search" /> </html:submit></p> </html:form> </body> </html:html>
<!-- display.jsp --> <!-- TECHSCORE Java JakartaStruts 17章 実習課題3 --> <!-- 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-bean" prefix="bean" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %> <html> <head><title>TECHSCORE Java JakartaStruts 17章 実習課題3</title></head> <body> <p>入力された文字 : <bean:write name="inputForm173" scope="request" property="inputText" /></p> <p><html:link page="/com/techscore/struts/chapter17/exercise3/ShowInputForm.do">入力に戻る</html:link></p> </body> </html>
<!-- search.jsp --> <!-- TECHSCORE Java JakartaStruts 16章 実習課題3 --> <!-- Copyright (c) 2004 Four-Dimensional Data, Inc. --> <%@ page import="java.net.URLEncoder" %> <%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %> <logic:redirect href="<%="http://www.google.co.jp/search?q=" + URLEncoder.encode(request.getParameter("inputText"), "UTF-8") %>" />
▼MessageResources.properties
button.display=display button.search=search
▼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> <form-beans> <form-bean name="inputForm173" type="com.techscore.struts.chapter17.exercise3.InputForm" /> </form-beans> <action-mappings> <action path="/com/techscore/struts/chapter17/exercise3/ShowInputForm" type="org.apache.struts.actions.ForwardAction" parameter="/WEB-INF/JSP/com/techscore/struts/chapter17/exercise3/input.jsp"> </action> <action path="/com/techscore/struts/chapter17/exercise3/Input" type="com.techscore.struts.chapter17.exercise3.LookupAction" parameter="method" name="inputForm173" scope="request"> <forward name="display" path="/WEB-INF/JSP/com/techscore/struts/chapter17/exercise3/display.jsp" /> <forward name="search" path="/WEB-INF/JSP/com/techscore/struts/chapter17/exercise3/search.jsp" /> </action> </action-mappings> <message-resources parameter="com.techscore.struts.MessageResources" /> </struts-config>
▼web.xml
<?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> <init-param> <param-name>config/admin</param-name> <param-value>/WEB-INF/struts-config-admin.xml</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> </web-app>
▼起動URLは以下の通り
WEB_ROOT/com/techscore/struts/chapter17/exercise3/ShowInputForm.do
EncodingFilter.javaの参照(2章の実習課題2と同じ)