Java™ How To Program (Early Objects), Tenth Edition

Validating Form Data in a Web Application

[Note: To create this application from scratch, review the steps in Section 30.4.3 and name the application Validation.] The example in this section prompts the user to enter a name, e-mail address and phone number in a form. When the user enters any data and presses the Submit button to submit the form’s contents to the web server, validation ensures that the user entered a value in each field, that the entered name does not exceed 30 characters, and that the e-mail address and phone-number values are in an acceptable format. In this example, [phone], 555-123-4567 and 123-4567 are all considered valid phone numbers. Once valid data is submitted, the JSF framework stores the submitted values in ...