JSF - f:validateRegex

JSF Tag

<f:validateRegex pattern="((?=.*[a-z]).{6,})" />

Tag Attributes

S.N.	Attribute & Description
1	pattern Formatting pattern

Example Application

Let us create a test JSF application to test the above tag.

Step	Description
1	Create a project with a name helloworld under a package com.tutorialspoint.test as explained in the JSF - First Application chapter.
2	Modify home.xhtml as explained below. Keep rest of the files unchanged.
3	Create result.xhtml in the webapps directory as explained below.
4	Create UserData.java as a managed bean under package com.tutorialspoint.test as explained below.
5	Compile and run the application to make sure business logic is working as per the requirements.
6	Finally, build the application in the form of war file and deploy it in Apache Tomcat Webserver.
7	Launch your web application using appropriate URL as explained below in the last step.

UserData.java

package com.tutorialspoint.test;

import java.io.Serializable;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "userData", eager = true)
@SessionScoped
public class UserData implements Serializable {

   private static final long serialVersionUID = 1L;

   private String password;
   public String getPassword() {
      return password;
   }
   public void setPassword(String password) {
      this.password = password;
   }   
}

home.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:h="http://java.sun.com/jsf/html"
   xmlns:f="http://java.sun.com/jsf/core">
   <h:head>
      <title>JSF tutorial</title>			
   </h:head>
   <h:body>    
   <h2>h:validateRegex Example</h2>
   <!-- password contains lower case letters only and.
   length of the password should be greater than 6. -->
   <h:form>
      <h:inputSecret id="passwordInput" value="#{userData.password}" 
         label="password" >
         <f:validateRegex pattern="((?=.*[a-z]).{6,})" />
      </h:inputSecret>			
      <h:commandButton value="submit" action="result"/>
      <h:message for="passwordInput" style="color:red" />
   </h:form>
</h:body>
</html>

result.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:f="http://java.sun.com/jsf/core"    
   xmlns:h="http://java.sun.com/jsf/html">
   <h:head>
      <title>JSF Tutorial!</title>   
   </h:head>
   <h:body>
      <h2>Result</h2>
      <hr />     
      Password: #{userData.password}     
   </h:body>
</html>

Once you are ready with all the changes done, let us compile and run the application as we did in JSF - First Application chapter. If everything is fine with your application, this will produce following result:

Enter an invalid value

Enter a valid value

Print Version

PDF Version

Tutorials Point - Simply Easy Learning