解答例 - 実習課題１ - ６．HTMLタグライブラリ２

（実習課題１）

５章の実習課題３を改良しなさい。

HTMLタグライブラリのtextタグを使用する事。

解答例

▼ディレクトリ構成は以下の通り

.
├─com
│  └─techscore
│      └─struts
│          └─chapter6
│              └─exercise1　　　　　inputEmployee.jsp,outputEmployee.jsp
└─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（5章 実習課題2と同じ）
    │              └─chapter6
    │                  └─exercise1　InputEmployeeForm.class,OutputEmployeeAction.class
    ├─lib　　　　　　　　　　　　　　strutsライブラリjarファイル
    └─tld　　　　　　　　　　　　　　struts-bean.tld,struts-html.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

/**
 * InputEmployeeForm.java
 * TECHSCORE Java JakartaStruts 6章 実習課題1
 *
 * Copyright (c) 2004 Four-Dimensional Data, Inc.
 *
 */

package com.techscore.struts.chapter6.exercise1;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;
import javax.servlet.http.HttpServletRequest;

public class InputEmployeeForm extends ActionForm{
    private String name = "";
    private String[] address = {"", ""};
    //※配列のインデックスを指定する場合には宣言時に配列の確保が必要
    private int number = 0;
    private boolean gender = false;
    private boolean existAddress2 = false;
  
    public void setName(String name){
        this.name = name;
    }
  
    public String getName(){
        return name;
    }

    public void setAddress(String address[]){
        this.address = address;
    }
  
    public String[] getAddress(){
        return address;
    }

    public void setNumber(int number){
        this.number = number;
    }
  
    public int getNumber(){
        return number;
    }

    public void setGender(boolean gender){
        this.gender = gender;
    }
  
    public boolean getGender(){
        return gender;
    }

    public void setExistAddress2(boolean existAddress2){
        this.existAddress2 = existAddress2;
    }
  
    public boolean getExistAddress2(){
        return existAddress2;
    }

//以下のメソッドがない場合にはチェックボックスの値が初期化されない
    public void reset(ActionMapping mapping, HttpServletRequest request){
        existAddress2 = false;
    }

    public ActionErrors validate(ActionMapping mapping, HttpServletRequest request){

        ActionErrors errors = new ActionErrors();

        if (name.equals("")) {
            errors.add("name", new ActionError("invalid.name"));
        }

        if (address[0].equals("")) {
            errors.add("address", new ActionError("invalid.address"));
        }

        if ((existAddress2) && (address[1].equals(""))) {
            errors.add("address2", new ActionError("invalid.address2"));
        }

        if (number == 0) {
            errors.add("number", new ActionError("invalid.number"));
        }

        return errors;

    }
}

/**
 * OutputEmployeeAction.java
 * TECHSCORE Java JakartaStruts 6章 実習課題1
 *
 * Copyright (c) 2004 Four-Dimensional Data, Inc.
 *
 */

package com.techscore.struts.chapter6.exercise1;

import org.apache.struts.action.Action;
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;

public class OutputEmployeeAction extends Action{

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

        if (isCancelled(request)) {
            return mapping.getInputForward();
        }

        return mapping.findForward("output");

    }

}

<!-- inputEmployee.jsp -->
<!-- TECHSCORE Java JakartaStruts 6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-html"
           prefix="html" %>

<html>
<head><title>TECHSCORE Java JakartaStruts 6章 実習課題1</title></head>
<body>

<h2>社員データ入力</h2>
<p>社員データを入力し、登録ボタンを押してください。</p>

<html:form action="/com/techscore/struts/chapter6/exercise1/InputEmployee.do" method="post">

    <table>

        <tr><th>名前</th>
            <td><html:text property="name" /></td>
            <td><html:errors property="name" /></td></tr>

        <tr><th>住所</th>
            <td><html:text property="address[0]" /></td>
            <td><html:errors property="address" /></td></tr>

        <tr><th>住所２</th>
            <td><html:text property="address[1]" /></td>
            <td><html:errors property="address2" /></td></tr>

        <tr><th>社員番号</th>
            <td><html:text property="number" /></td>
            <td><html:errors property="number" /></td></tr>

        <tr><th>性別</th>
            <td><input type="radio" name="gender" value="true" CHECKED>男
                <input type="radio" name="gender" value="false">女</td>
            <td></td></tr>

    </table>

    
    <p><input type="checkbox" name="existAddress2" value="true">住所２あり</p>

    <p><html:submit value="登録" />
       <html:cancel value="キャンセル" /></p>

</html:form>

※名前、住所、社員番号は必ず入力してください。<br>
※住所２は複数登録が必要な場合のみチェックをつけて入力してください。<br>
　住所２ありにチェックをつけていないと、住所２を入力していても登録されません。<br>
　また、住所２ありにチェックをつけている場合は、必ず住所２へ入力が必要です。<br>
※社員番号に0だけもしくは数字以外を入力すると登録されません。<br>

</body>
</html>

<!-- outputEmployee.jsp -->
<!-- TECHSCORE Java JakartaStruts 6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-bean"
           prefix="bean" %>

<html>
<head><title>TECHSCORE Java JakartaStruts 6章 実習課題1</title></head>
<body>

<h2>社員データ入力</h2>
<p>登録された社員データは以下の通りです</p>

<jsp:useBean id="inputEmployeeForm61"
             class="com.techscore.struts.chapter6.exercise1.InputEmployeeForm"
             scope="request" />

<table border="2">
    <tr><th>氏名</th>
    <td><bean:write name="inputEmployeeForm61" scope="request" property="name" /></td></tr>

    <tr><th>住所</th>
    <td><bean:write name="inputEmployeeForm61" scope="request" property="address[0]" /></td></tr>

    <% if (inputEmployeeForm61.getExistAddress2()) { %>
           <tr><th>住所２</th>
           <td><bean:write name="inputEmployeeForm61" scope="request" property="address[1]" /></td></tr>
    <% } %>

    <tr><th>社員番号</th>
    <td><bean:write name="inputEmployeeForm61" scope="request" property="number" /></td></tr>

    <% if (inputEmployeeForm61.getGender()) { %>
           <tr><th>性別</th><td>男</td></tr>
    <% } else { %>
           <tr><th>性別</th><td>女</td></tr>
    <% } %>
</table>

<p><a href="<%=request.getContextPath() %>/com/techscore/struts/chapter6/exercise1/inputEmployee.jsp">入力に戻る</p>

</body>
</html>

▼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="inputEmployeeForm61"
                   type="com.techscore.struts.chapter6.exercise1.InputEmployeeForm" />
    </form-beans>

    <action-mappings>
        <action path="/com/techscore/struts/chapter6/exercise1/InputEmployee"
                type="com.techscore.struts.chapter6.exercise1.OutputEmployeeAction"
                name="inputEmployeeForm61"
                scope="request"
                validate="true"
                input="/com/techscore/struts/chapter6/exercise1/inputEmployee.jsp">
            <forward name="output"
                     path="/com/techscore/struts/chapter6/exercise1/outputEmployee.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">

<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>

</web-app>

▼起動URLは以下の通り

WEB_ROOT/com/techscore/struts/chapter6/exercise1/inputEmployee.jsp

EncodingFilter.javaの参照（2章の実習課題2と同じ）

MessageResources.propertiesの参照（5章の実習課題2と同じ）

MessageResource.txtの参照（5章の実習課題2と同じ）

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