Validation examples

[Nelo Angelo]

Hello everyone,

Can anyone please suggest me with some examples of how to validate data on the server side. I tried out the Javascript and looked at some regex methods. The regex methods actually use methods from the class Pattern. I cannot find examples that uses Validator class. I was told to read the Javadocs but I am not able to understand how those methods work.

So I would appreciate if anyone could provide me with links to examples for validation at the server side.

[Bear Bibeault]

What Validator class? There isn't any Validator class in the Servlets Specification. Are you using a framework? If so, which one?

[Nelo Angelo]

Correct, there are none in the Servlets specification.

I was asking about the one in "javax.xml.validation.*" package.

If this package is not discussed in the Servlets section would you please suggest me the methods/examples of Input/Data Validation in servlets.

[Saifuddin Merchant]

The javax.xml.validation.* package is for validating XML files against schema's

If you need to perform regular validation for a web application - you might have to choose from a host of third party validation frameworks available out there.

Apache - Validator

Spring Validator

Hibernate's Bean Validator (JSR-303)

Most of them provide plugability into most of the web frameworks.

There is no standard way to validate data on the server side (as per the servlet specs) but most frameworks provide some sort of validation step (e.g. Struts 2 validation)