java - Validation in JSF -


i'm trying implement validation of form don't accept when fill in numbers or characters.

this login.xhtml

<?xml version='1.0' encoding='utf-8' ?> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"       xmlns:ui="http://xmlns.jcp.org/jsf/facelets"       xmlns:c="http://xmlns.jcp.org/jsp/jstl/core"       xmlns:h="http://xmlns.jcp.org/jsf/html"       xmlns:f="http://xmlns.jcp.org/jsf/core">      <h:body>         <ui:composition template="./templates/template.xhtml">             <ui:define name="content">                 <p><h:link outcome="/index" value="to home page" /></p>                 <h:form>                     username: <h:inputtext id="username" value="#{user.name}" required="true" requiredmessage="username name required"><f:validator validatorid="usernamevalidator" /></h:inputtext><br/>                     password: <h:inputtext id="password" value="#{user.password}" required="true" requiredmessage="password required"><f:validator validatorid="passwordvalidator" /></h:inputtext><br/>                     email: <h:inputtext id="email" value="#{user.email}" required="true" requiredmessage="email required"><f:validator validatorid="emailvalidator" /></h:inputtext>                      <h:commandbutton id="cbtn2" value="submit" action="home"/>                 </h:form>              </ui:define>         </ui:composition>      </h:body> </html>

and validation class:

package validation;   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 passwordvalidator implements validator{         @override     public void validate(facescontext context, uicomponent component, object value)             throws validatorexception {          string password = (string) value;          if(!password.contains("([1-9]/[a-z]-[1-9]-[1-9]-[1-9](-[1-9])?")) {             facesmessage message = new facesmessage();             message.setseverity(facesmessage.severity_error);             message.setsummary("value entered not valid - please enter value contains [1-9]/[a-z].");             message.setdetail("value entered not valid - please enter value contains [1-9]/[a-z].");             context.addmessage("userform:password", message);             throw new validatorexception(message);         }     } }

anyone know why don't accept when fill in admin?

string.contains not take regular expression; try string.matches instead.

for regex matches numbers , characters, try ^\w+$. says, "match start of string, @ least 1 'word' character (which number or letter), match end of string".


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