• Created by tm_jee, last updated by Unknown User (lukaszlenart) on Aug 25, 2015 1 minute read

Let's create a Client-Side validation workflow, step by step.

(info) The validate attribute is set to true.

(info) Some themes do not support client-side validation.

Step 1

Create the form.{snippet:id=clientValidation|lang=xml|javadoc=false|url=struts2/apps/showcase/src/main/webapp/WEB-INF/validation/quiz-client.jsp}(info) This case uses the default xhtml theme, so the <s:head > tag is used to link a style sheet.

Step 2

Create the Action class.{snippet:id=quizAction|javadoc=false|lang=java|url=struts2/apps/showcase/src/main/java/org/apache/struts2/showcase/validation/QuizAction.java}

Step 3

Create the validation.xml to configure the validators to be used.{snippet:id=quizValidators|javadoc=false|lang=xml|url=struts2/apps/showcase/src/main/resources/org/apache/struts2/showcase/validation/QuizAction-validation.xml}

Action and Namespace

A correct action and namespace attributes must be provided to the <s:form> tag. For example, if the action named "quizClient" is defined in the "/validation" namespace, the form must be configured as:

XML<s:form method="post" validate="true" action="quizClient" namespace="/validation"> <s:textfield label="Name" name="name"/> <s:textfield label="Age" name="age"/> <s:textfield label="Favorite color" name="answer"/> <s:submit/> </s:form>

While the following will "work" in the sense that the form will function correctly, client-side validation will not. That is because Struts must know the exact namespace and action (rather than a URL) to properly support validation.

XML<s:form method="post" validate="true" action="/validation/quizClient.action"> <s:textfield label="Name" name="name"/> <s:textfield label="Age" name="age"/> <s:textfield label="Favorite color" name="answer"/> <s:submit/> </s:form>
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4 Comments

  1. Gudiya

    Aug 18, 2009

    In client side validation if we keep validate="true" and theme="simple" Than clent validation won't works.

    1. Unknown User (phil)

      Aug 19, 2009

      That is pointed out at the very start of the page.

  2. Gaurav Dighe

    Jan 23, 2013

    This one of the best resource for a new learner like me.

    Where can I find the project of the above example for downloading?

    1. Unknown User (lukaszlenart)

      Jan 26, 2013

      You can always check out the Showcase demo app https://svn.apache.org/repos/asf/struts/struts2/trunk/apps/showcase/ or download struts2-apps-x.x.x.zip package.