フォームの価格の欄の初期値に0が入ってしまう

validationの練習をstruts1.2でやっております。

しかし、フォームのテキストボックスに何もしなくとも0が入ってしまいます。
なぜこのような現象が起こるのか、そして、どうすれば初期値が何も入っていない状態になるのかご存じの方がいらっしゃいましたら教えていただきたいです。

足りない情報がありましたら、ご指摘ください。
画面遷移自体は、入力値に問題がなければ、遷移しています。

validation.xml

xml
1<form name="/forvalidation2">
2        	<field property="name" depends="required,minlength,maxlength">
3        		<arg0 key="name" />
4        		<arg1 name="minlength" key="${var:minlength}" resource="false"/>
5        		<arg1 name="maxlength" key="${var:maxlength}" resource="false"/>
6        		<var>
7					<var-name>minlength</var-name>
8					<var-value>4</var-value>
9				</var>
10				<var>
11					<var-name>maxlength</var-name>
12					<var-value>12</var-value>
13				</var>
14        	</field>
15        	<field property="price" depends="required,mask">
16        		<arg name="required" key="price" position="0" />
17        		<arg name="mask" key="price" />
18        		<var>
19                    	<var-name>mask</var-name>
20                    	<var-value>^[0-9,.-]*$</var-value>
21                </var>
22        	</field>
23        	<field property="register_date" depends="required,mask">
24        		<arg name="required" key="register_date" position="0" />
25        		<arg name="mask" key="register_date" />
26        		<var>
27                    	<var-name>mask</var-name>
28                    	<var-value>^\d{4}-\d{1,2}-\d{1,2}$</var-value>
29                </var>
30        	</field>
31        </form>

validator-rules.xml

xml
1<validator name="mask"
2            classname="org.apache.struts.validator.FieldChecks"
3               method="validateMask"
4         methodParams="java.lang.Object,
5                       org.apache.commons.validator.ValidatorAction,
6                       org.apache.commons.validator.Field,
7                       org.apache.struts.action.ActionMessages,
8                       org.apache.commons.validator.Validator,
9                       javax.servlet.http.HttpServletRequest"
10              depends=""
11                  msg="errors.invalid"/>

messageResources.properties

# -- validator --
errors.invalid={0} is invalid.

errors.maxlength={0} can not be greater than {1} characters.
errors.minlength={0} can not be less than {1} characters.
errors.range={0} is not in the range {1} through {2}.
errors.required={0} is required.
errors.byte={0} must be an byte.
errors.date={0} is not a date.
errors.double={0} must be an double.
errors.float={0} must be an float.
errors.integer={0} must be an integer.
errors.long={0} must be an long.
errors.short={0} must be an short.
errors.creditcard={0} is not a valid credit card number.
errors.email={0} is an invalid e-mail address.
# -- other --
errors.cancel=Operation cancelled.
errors.detail={0}
errors.general=The process did not complete. Details should follow.
errors.token=Request could not be completed. Operation is not in sequence.
# -- welcome --
welcome.title=Struts Blank Application
welcome.heading=Welcome!
welcome.message=To get started on your own application, copy the struts-blank.war to a new WAR file using the name for your application. Place it in your container's "webapp" folder (or equivalent), and let your container auto-deploy the application. Edit the skeleton configuration files as needed, restart your container, and you are on your way! (You can find the application.properties file with this message in the /WEB-INF/src/java/resources folder.)

# -- messages --
logon.id=LoginId

bitmform.itm=Item Id
bitmform.inm=Item name
bitmform.kit=Item type
bitmform.cit=Item group

name=name
price=price
register_date=register date

入力フォーム

jsp
1<%@ page language="java" contentType="text/html; charset=UTF-8"
2    pageEncoding="UTF-8"%>
3    <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
4<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
5<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
6<!DOCTYPE html>
7<html:html>
8<head>
9<meta charset="UTF-8">
10<title>Insert title here</title>
11</head>
12<body>
13	<h3>Validation実験用登録</h3>
14  <html:form action="/forvalidation2">
15    <dl class="row">
16      <dt class="col-sm-2">品名</dt>
17      <dd class="col-sm-2">4-12文字</dd>
18      <dd class="col-sm-8"><html:text property="name" /><html:errors property="name"/></dd>
19      <dt class="col-sm-2">価格</dt>
20      <dd class="col-sm-2">数字</dd>
21      <dd class="col-sm-8"><html:text property="price" /><html:errors property="price"/></dd>
22      <dt class="col-sm-2">登録日</dt>
23      <dd class="col-sm-2">YYYY-MM-DD</dd>
24      <dd class="col-sm-8"><html:text property="register_date" /><html:errors property="register_date"/></dd>
25    </dl>
26  <html:submit styleClass="btn"></html:submit>
27  </html:form>
28</body>
29</html:html>

actionform

java
1public class ForValidationForm extends ValidatorActionForm{
2
3	private String name="";
4	private int price;
5	private String register_date="";
6
7	public String getName() {
8		return name;
9	}
10	public void setName(String name) {
11		this.name = name;
12	}
13	public int getPrice() {
14		return price;
15	}
16	public void setPrice(int price) {
17		this.price = price;
18	}
19	public String getRegister_date() {
20		return register_date;
21	}
22	public void setRegister_date(String register_date) {
23		this.register_date = register_date;
24	}
25}
26