How to show Custom ActionError, ActionMessage and FieldError in Struts 2.x?

 ActionError- It is used to show error message (means -ve sense  message) to  users.

ActionMessage- It is used to show informative  message (means +ve sense  message) to  users.

FieldError- It is used to show field error (validation error) to users.

home.jsp

In this page we will check for actionmessage, actionerror and field error .If any of these exist then errorHandling.jsp page will display in dialog box.

<s:if test="hasFieldErrors() || hasActionMessages() || hasActionErrors()">

          <jsp:include page="/jsps/errorHandling.jsp"/>

 </s:if>

errorHandling.jsp

This page will display custom message to the users. I am using Struts2-jquery library's dialog box and theme for custom message.

<%@taglib prefix="s" uri="/struts-tags" %>
<%@taglib uri="/struts-jquery-tags" prefix="sj" %>
<div style="visibility:hidden">
    <sj:dialog
        id="ErrorDialog"
        title=" "
        modal="true"
        width="500"
        resizable="false"
        buttons="{
        'O K':function() {
        $(this).dialog('close');
        }
        }"
        >
        <h6>
            <s:actionmessage theme="jquery"/>
            <s:fielderror theme="jquery"/>
            <s:actionerror theme="jquery"/>
        </h6>
    </sj:dialog>
</div>

we add these messages and errors in Action class by overriding following methods:

For ActionMessage-  addActionMessage("Logged Out Successfully");

For ActionError-  addActionError("You are Not a Valid User");

For FieldError-  addFieldError("password", "Please Enter password."); Here first parameter is field name to check for and second parameter  is your  message to display to users.

 

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