处理表示层中的JSF验证错误，避免使用h：message

Question

Is there a way to let JSF do validations for my inputs but let me control how to display the validation errors? I want to avoid using h:message

I find it making my code too messy when I write a h:message component below every input components inside forms needing validation support. Since there are several forms on the page using h:messages is not an option as that would show the error messages of other forms as well. So I want to handle the error messages sent after validation to the presentation layer & do the errors presentation task myself using JS/Jquery. So how do I handle errors thrown by JSF validation service?

Answer 1

Just conditionally render the <h:messages> based on UIForm#isSubmitted() .

<h:form binding="#{form1}">
    <h:messages rendered="#{form1.submitted}" />
    ...
</h:form>
<h:form binding="#{form2}">
    <h:messages rendered="#{form2.submitted}" />
    ...
</h:form>
<h:form binding="#{form3}">
    <h:messages rendered="#{form3.submitted}" />
    ...
</h:form>

Or just bring in some ajax magic and update the current form only instead of the entire view.

<h:form>
    <h:messages />
    ...
    <h:commandButton ...><f:ajax execute="@form" render="@form" /></h:commandButton>
</h:form>
<h:form>
    <h:messages />
    ...
    <h:commandButton ...><f:ajax execute="@form" render="@form" /></h:commandButton>
</h:form>
<h:form>
    <h:messages />
    ...
    <h:commandButton ...><f:ajax execute="@form" render="@form" /></h:commandButton>
</h:form>

---

So I want to handle the error messages sent after validation to the presentation layer & do the errors presentation task myself using JS/Jquery.

Create a custom component or renderer which replaces the <h:messages> .