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)

