解答例 - 実習課題2 - 15.Javascriptでの検証/検証ルールの追加
(実習課題2)
実習課題1のWebアプリケーションを改良しなさい。
- 偶数であることをチェックする検証ルールを作成し、int型のプロパティに対して適応すること。
解答例
▼ディレクトリ構成は以下の通り
.
└─WEB-INF web.xml(13章 実習課題1と同じ),struts-config.xml,validation.xml,
│ orig-validator-rules.xml,
│ validator-rules.xml(Strutsで提供されているものそのまま)
├─classes
│ └─com
│ └─techscore
│ └─struts EncodingFilter.class(2章 実習課題2と同じ)
│ │ MessageResources.properties
│ ├─chapter13
│ │ └─exercise2 RuleCheckForm.class(13章 実習課題2と同じ)
│ └─chapter15
│ └─exercise2 ValidateEven.class
├─JSP
│ └─com
│ └─techscore
│ └─struts
│ └─chapter15
│ └─exercise2 inputTest.jsp,outputTest.jsp
├─lib strutsライブラリjarファイル
└─tld struts-html.tld,struts-nested.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,
commons-validator.jar
package com.techscore.struts.chapter15.exercise2;
import java.io.Serializable;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.validator.Field;
import org.apache.commons.validator.GenericValidator;
import org.apache.commons.validator.ValidatorAction;
import org.apache.commons.validator.ValidatorUtil;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.validator.Resources;
public class ValidateEven implements Serializable {
public static void validateEven(Object bean, ValidatorAction action,
Field field, ActionErrors errors,
HttpServletRequest request) {
String value = ValidatorUtil.getValueAsString(bean, field.getProperty());
//空白なら何もしない
if (!GenericValidator.isBlankOrNull(value)) {
if (GenericValidator.isInt(value)) {
int num = Integer.parseInt(value);
if (num % 2 == 0) {
//値が数字でかつ偶数ならば何もしない
return;
}
}
ActionError error = Resources.getActionError(request, action, field);
errors.add(field.getKey(), error);
}
}
}
<!-- inputTest.jsp -->
<!-- TECHSCORE Java JakartaStruts 15章 実習課題2 -->
<!-- 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 15章 実習課題2</title>
<html:javascript formName="/com/techscore/struts/chapter15/exercise2/OutputTest" method="check" />
</head>
<body>
<h2>テストデータ入力</h2>
<p>どちらも数字を入力し、登録ボタンを押してください。</p>
<html:form action="/com/techscore/struts/chapter15/exercise2/OutputTest"
onsubmit="return check(this)">
<table>
<tr><th>String</th>
<td><html:text property="testString" /></td>
<td><html:errors property="testString" /></td></tr>
<tr><th>int</th>
<td><html:text property="testInt" /></td>
<td><html:errors property="testInt" /></td></tr>
</table>
<p><html:submit value="登録"/></p>
</html:form>
<p>※Stringは3文字以内、intは3桁以上のみ登録可能です。</p>
</body>
</html>
<!-- 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-nested" prefix="nested" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<html>
<head><title>TECHSCORE Java JakartaStruts 15章 実習課題2</title></head>
<body>
<h2>テストデータ入力</h2>
<p>登録されたデータは以下の通りです</p>
<table border="2">
<tr><th>String</th>
<td><nested:root name="ruleCheckForm132"><nested:write property="testString" /></td></tr>
<tr><th>int</th>
<td><nested:write property="testInt" /></nested:root></td></tr>
</table>
<p><html:link action="/com/techscore/struts/chapter15/exercise2/InputTest">入力に戻る</html:link></p>
</body>
</html>
errors.header=<font color="red">
errors.footer=</font>
testString.notInteger=String must be integer
testInt.notInteger=int must be integer
testString.maxlengthError=String length must be equal to or less than {0}
testInt.minlengthError=int length must be equal to or more than {0}
testString.notEven=String must be even
testInt.notEven=int must be even
productCode.illegal=check productCode
amount.illegal=check amount
name.required=製品名は必須です。
name.invalidate=製品名が不正です。
▼orig-validator-rules.xml
<?xml version="1.0" encoding="Shift_JIS" ?>
<!DOCTYPE form-validation PUBLIC
"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0//EN"
"http://jakarta.apache.org/commons/dtds/validator_1_0.dtd">
<form-validation>
<global>
<validator name="even"
classname="com.techscore.struts.chapter15.exercise2.ValidateEven"
method="validateEven"
methodParams="java.lang.Object,
org.apache.commons.validator.ValidatorAction,
org.apache.commons.validator.Field,
org.apache.struts.action.ActionErrors,
javax.servlet.http.HttpServletRequest"
msg="errors.invalidate">
</validator>
</global>
</form-validation>
<?xml version="1.0" encoding="ISO_8859-1"?>
<!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="ruleCheckForm132"
type="com.techscore.struts.chapter13.exercise2.RuleCheckForm" />
</form-beans>
<action-mappings>
<action path="/com/techscore/struts/chapter15/exercise2/InputTest"
forward="/WEB-INF/JSP/com/techscore/struts/chapter15/exercise2/inputTest.jsp" />
<action path="/com/techscore/struts/chapter15/exercise2/OutputTest"
name="ruleCheckForm132"
scope="request"
validate="true"
input="/WEB-INF/JSP/com/techscore/struts/chapter15/exercise2/inputTest.jsp"
forward="/WEB-INF/JSP/com/techscore/struts/chapter15/exercise2/outputTest.jsp" />
</action-mappings>
<message-resources parameter="com.techscore.struts.Messages" />
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames"
value="/WEB-INF/validator-rules.xml,/WEB-INF/orig-validator-rules.xml,
/WEB-INF/validation.xml" />
</plug-in>
</struts-config>
<?xml version="1.0" encoding="ISO_8859-1"?>
<!DOCTYPE form-validation
PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0//EN"
"http://jakarta.apache.org/commons/dtds/validator_1_0.dtd">
<form-validation>
<formset>
<form name="/com/techscore/struts/chapter15/exercise2/OutputTest">
<field property="testString" depends="integer,even,maxlength">
<msg name="integer" key="testString.notInteger" />
<msg name="even" key="testString.notEven" />
<msg name="maxlength" key="testString.maxlengthError" />
<arg0 name="maxlength" key="${var:maxlength}" resource="false" />
<var>
<var-name>maxlength</var-name>
<var-value>3</var-value>
</var>
</field>
<field property="testInt" depends="integer,even,minlength">
<msg name="integer" key="testInt.notInteger" />
<msg name="even" key="testInt.notEven" />
<msg name="minlength" key="testInt.minlengthError" />
<arg0 name="minlength" key="${var:minlength}" resource="false" />
<var>
<var-name>minlength</var-name>
<var-value>3</var-value>
</var>
</field>
</form>
</formset>
</form-validation>
▼起動URLは以下の通り
WEB_ROOT/com/techscore/struts/chapter15/exercise2/InputTest.do
EncodingFilter.javaの参照(2章の実習課題2と同じ)
RuleCheckForm.javaの参照(13章の実習課題2と同じ)

