Client validation validation does not work using validate ()

Question

I am doing validation inside the validate () method.

public void validate(){
    if(continent.equals("-1")){
        HttpServletRequest request=ServletActionContext.getRequest();  
        HttpSession session=request.getSession();  
        String s=(String)session.getAttribute("operation");
        if(s.equals("edit"))
                edit();
        else if(s.equals("add"))
                add();
        addFieldError( "Continent", "Continent must be selected");
    }
}

And in jsp (view) the form attribute validate = true is added

<s:form action="add" name="aaa" cssClass="yy" method="post" validate="true">
        <s:textfield name="Code" label="Code" readonly="false" cssClass="defaultTextBox"/>
        <s:textfield name="Name" label="Name" cssClass="defaultTextBox"/>
        <s:select name="Continent" label="Continent" headerKey="-1" headerValue="Select" list="continentlist" cssClass="defaultTextBox"/>
        <s:textfield name="IndepYear" label="Independance Year" cssClass="defaultTextBox" />
        <s:submit value="Save" cssClass="login login-submit" theme="simple"/>
</s:form>

But only server side validation works. My question is: → Can't add client side validation using validate () method?

Answer 1

In Struts 2, client-side validation has different meanings and is completely dependent on the type of theme you are using.

• C XHTML(default) and CSS XHTMLyou can use

  • Pure JavaScript client side validation

  which is fully client-side, Javascript is based and does not communicate with the server.

• AJAX

  • AJAX

  , ( ), validate().

---

SIMPLE, HTML, CSS JavaScript .

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HTML5 jQuery, .

Answer 2

. validate ... , . JS , .

Answer 3

AJAX , struts2-jquery plugin, Showcase :

• Form Forms with Validation
• Form Forms with Custome Validation

, , - AJAX.