You could try using a component binding for the input field you wish to
reset.
So in Credit.java add something like:
private UIInput inputField;
public void setInputField(UIInput inputField) { this.inputField =
inputField; }
public UIInput getInputField() { return inputField };
update the action method clearCreditInput to be something like:
public void clearCreditInput() {
input = new CreditInput();
inputField.resetValue();
}
**
Then modify the JSP containing the h:inputText for the credit card number to
look something like:
<h:inputText id="num"
binding="#{billForm.inputField}"
value="#{billForm.input.cardnum}"
required="true">
...
</h:inputText>
This 'binding' attribute allows you to bind the component instance to a
managed
bean so that you can directly manipulate said component. In this case,
you can
reset the input component to the original uninitialized state.
Alternatively, you could remove the action associated with your cancel
button,
set the button type to "reset", and add immediate="true".
Perumahanti, Krishna wrote:
>
> Hi,
>
>
>
> I am new to JSF. Infact i am not a programmer. But, recently i started
> using this application using Exadel IDE.
>
> I am facing a problem with reset button. I have used converters and
> validators in my application. I have two inputfields where user needs
> to enter the values in numbers only. If not it gives error message.
> After giving this error message, if i click on reset button it's not
> removing the values from the page.
>
> I just used managed beans to create this application. Before
> validation if i click reset it is resetting the form to clear the fields.
>
> Please have a look at the following code where I am getting problem
> with the Reset button.
>
>
>
> *_Cardnum.java_*
>
> *package* jsftraining;
>
> *public* *class* Cardnum {
> *private* String number;
>
> *public* Cardnum (String number){
> this.number = number;
> }
> *public* String toString (){
> *return* this.number;
> }
> }
>
>
>
> *_CardnumConverter.java_*
>
> *package* jsftraining;
> *import* java.util.ResourceBundle;
> *import* javax.faces.application.FacesMessage;
> *import* javax.faces.component.UIComponent;
> *import* javax.faces.context.FacesContext;
> *import* javax.faces.convert.Converter;
> *import* javax.faces.convert.ConverterException;
> *public* *class* CardnumConverter *implements* Converter {
>
> *public* Object getAsObject(FacesContext context,
> UIComponent component,
> String newValue) {
>
> StringBuffer buffer = *new* StringBuffer(newValue);
> *boolean* foundInvalidChar = *false*;
>
> *int* i = 0;
> *while* (i < buffer.length()) {
>
> *char* ch = buffer.charAt(i);
>
> *if* (Character.isDigit(ch) ||
> Character.isWhitespace(ch) ||
> ch == '-'){
> i++;
> *continue*;
> }
> *else* { // found invalid char
> foundInvalidChar = *true*;
> *break*;
> }
> }
> *if* (foundInvalidChar) {
> ResourceBundle bundle = ResourceBundle.getBundle("jsftraining.messages_en",
> context.getViewRoot().getLocale());
>
> String key = "invalidCardnumChar";
> String msgSummary = bundle.getString(key);
> String msgDetail = bundle.getString(key+"_detail");
>
> FacesMessage message = *new* FacesMessage (msgSummary,msgDetail);
>
> *throw* *new* ConverterException (message);
> }
> *return* *new* Cardnum( buffer.toString() );
> }
> *public* String getAsString(FacesContext context,
> UIComponent component,
> Object value) {
>
> *return* value.toString();
> }
> }
>
>
>
> *_CardnumValidator.java_*
>
> *package* jsftraining;
>
> *import* java.util.ResourceBundle;
> *import* java.util.regex.Matcher;
> *import* java.util.regex.Pattern;
> *import* javax.faces.application.FacesMessage;
> *import* javax.faces.component.UIComponent;
> *import* javax.faces.context.FacesContext;
> *import* javax.faces.validator.Validator;
> *import* javax.faces.validator.ValidatorException;
>
> *public* *class* CardnumValidator *implements* Validator {
>
> *public* *void* validate(FacesContext context,
> UIComponent component,
> Object value)
> *throws* ValidatorException {
> System.out.println ( "------- INSIDE Custom Validator");
> String cardnumNumber = "";
> *if* ( value *instanceof* Cardnum)
> cardnumNumber = value.toString();
> *else*
> cardnumNumber = value.toString(); // if not Telephone object
>
> *if* (cardnumNumber.length() == 0) *return*;
>
> Pattern creditCardPattern =
> Pattern.compile("[345]\\d\\d\\d-\\d\\d\\d\\d-\\d\\d\\d\\d-\\d\\d\\d\\d");
> Matcher creditCardMatcher = creditCardPattern.matcher(cardnumNumber);
>
> *if* (!creditCardMatcher.matches()) {
>
> ResourceBundle bundle = ResourceBundle.getBundle("jsftraining.messages_en",
> context.getViewRoot().getLocale());
>
> String key = "invalidCardNumber";
> String msgSummary = bundle.getString(key);
> String msgDetail = bundle.getString(key+"_detail");
>
> FacesMessage message = *new* FacesMessage (msgSummary,msgDetail);
>
> *throw* *new* ValidatorException (message);
> }
> }
> }
>
>
>
> *_Credit.java_*
>
> *package* jsftraining;
> *import* jsftraining.CreditInput;
> *public* *class* Credit {
> *public* CreditInput input = *new* CreditInput();
> *public* CreditInput getInput() {
> *return* input;
> }
> *public* *void* setInput(CreditInput input) {
> this.input = input;
> }
> *public* String paid(){
> *return* "paid";
> }
> *public* *void* clearCreditInput() {
> input = *new* CreditInput();
> }
> }
>
>
>
> *_CreditInput.java_*
>
> *package* jsftraining;
>
> *public* *class* CreditInput {
> *private* java.lang.Float amount;
> *private* Cardnum cardnum;
> *public* java.lang.Float getAmount() {
> *return* amount;
> }
> *public* *void* setAmount(java.lang.Float amount) {
> this.amount = amount;
> }
> *public* Cardnum getCardnum() {
> *return* cardnum;
> }
> *public* *void* setCardnum(Cardnum cardnum) {
> this.cardnum = cardnum;
> }
> }
>
>
>
> *_messages_en.properties:_*
>
> detailsPageTitle=Credit Card Payment
> amountDetails=Amount\:
> buttonLabel=Process
> numberPrompt=Credit Card Number\:
> resultPageTitle=Thank you *for* the payment
> invalidCardnumChar=Invalid Card number entered.
> invalidCardnumChar_detail=Please enter numeric values only.
> invalidCardNumber=Invalid card number.
> invalidCardNumber_detail=Please enter a valid card number that starts with 345 and exactly has 16 digits. Please follow the following format xxxx-xxxx-xxxx-xxxx
>
>
>
> *_CardInfo.jsp_*
>
> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
> <f:loadBundle basename="jsftraining.messages_en" var="msg" />
>
> <html>
> <head>
> <title>JSF Application</title>
> </head>
> <body>
> <f:view>
> <h:form>
> <h2><h:outputText value="#{msg.detailsPageTitle}"/></h2>
> <table>
> <tr>
> <td>
> <h:outputText value="#{msg.numberPrompt}"/>
> </td>
> <td>
> <h:inputText id="num" value="#{billForm.input.cardnum}"
> required="true">
> <f:validator validatorId="jsftraining.Cardnum"/>
> </h:inputText>
> <h:message for="num"/>
> <h:outputText value="#{billForm.input.cardnum}"/>
> </td>
> </tr>
> <tr>
> <td>
> <h:outputText value="#{msg.amountDetails}"/>
> </td>
> <td>
> <h:inputText id="amt" value="#{billForm.input.amount}" />
> <h:message for="amt"/>
> </td>
> </tr>
> <tr>
> <td colspan="2">
>
> <h:commandButton value="#{msg.buttonLabel}"
> action="#{billForm.paid}"/>
>
> <h:commandButton value="clear" action="#{billForm.clearCreditInput}"/>
> </td>
> </tr>
> </table>
> </h:form>
> </f:view>
> </body>
> </html>
>
>
>
> *_paiddetails.jsp_*
>
> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
> <f:loadBundle basename="jsftraining.messages_en" var="msg" />
>
> <html>
> <head>
> <title>JSF Application</title>
> </head>
> <body>
> <f:view>
> <h:form>
> <h2><h:outputText value="#{msg.resultPageTitle}"/></h2>
> <table>
> <tr>
> <td>
> <h:outputText value="#{msg.numberPrompt}"/>
> </td>
> <td>
> <h:outputText id="num" value="#{billForm.cardnum}"/>
> </td>
> </tr>
> <tr>
> <td>
> <h:outputText value="#{msg.amountDetails}"/>
> </td>
> <td>
> <h:outputText id="amt" value="#{billForm.amount}"/>
> </td>
> </tr>
> </table>
> </h:form>
> </f:view>
> </body>
> </html>
>
>
>
> *_faces-config.xml_*
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
> "http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
> <faces-config>
> <converter>
> <converter-for-class>jsftraining.Cardnum</converter-for-class>
> <converter-class>jsftraining.CardnumConverter</converter-class>
> </converter>
> <managed-bean>
> <managed-bean-name>billForm</managed-bean-name>
> <managed-bean-class>jsftraining.Credit</managed-bean-class>
> <managed-bean-scope>session</managed-bean-scope>
> </managed-bean>
> <navigation-rule>
> <from-view-id>/pages/cardinfo.jsp</from-view-id>
> <navigation-case>
> <from-outcome>paid</from-outcome>
> <to-view-id>/pages/paiddetails.jsp</to-view-id>
> </navigation-case>
> </navigation-rule>
> <validator>
> <validator-id>jsftraining.Cardnum</validator-id>
> <validator-class>jsftraining.CardnumValidator</validator-class>
> </validator>
> <lifecycle/>
> <application>
> <locale-config>
> <default-locale>en</default-locale>
> <supported-locale>en</supported-locale>
> </locale-config>
> </application>
> <factory/>
> </faces-config>
>
>
>
> *_index.jsp_*
>
> <!doctype html *public* "-//w3c//dtd html 4.0 transitional//en">
> <html>
> <head></head>
> <body>
> <jsp:forward page="/pages/cardinfo.jsf" />
> </body>
> </html>
>
>
>
> Thanks,
>
> *Krishna** Perumahanti*
> Usability Engineer
>
> Tel: +040-666 71195
> Mobile: +91-9989700019
> Krishna.Perumahanti_at_ca.com
> visit: www.ca.com <mailto:Krishna.Perumahanti_at_ca.com>
>
> <http://www.ca.com/>
>
>
>