Struts2 actionError and actionMessage | Code Factory


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File : index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
    <%@ taglib prefix="s" uri="/struts-tags"%>
        <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
        <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
            <title>Index page</title>
        </head>
        <body>
            <center>
                <s:if test="hasActionErrors()">
                    <div>
                        <span style="text-align: center; color: red; font-size: 17px;"><s:actionerror /></span>
                    </div>
                </s:if>
                <s:if test="hasActionMessages()">
                    <div>
                        <span style="text-align: center; color: green; font-size: 17px;"><s:actionmessage /></span>
                    </div>
                </s:if>
                <br>
                <form action="checkName" method="post">
                    <input type="text" name="firstName">
                    <input type="submit" value="Submit">
                </form>
            </center>
        </body>
        </html>

File : struts.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
    <struts>
        <constant name="struts.devMode" value="true" />
        <include file="struts-default.xml" />
        <package name="actionErrorActionMessage" extends="struts-default">
            <action name="checkName" class="com.codeFactory.checkNameAction">
                <result name="success">index.jsp</result>
            </action>
        </package>
    </struts>

File : web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
        <display-name>actionErrorActionMessage</display-name>
        <welcome-file-list>
            <welcome-file>index.jsp</welcome-file>
        </welcome-file-list>
        <filter>
            <filter-name>struts2</filter-name>
            <filter-class>
                org.apache.struts2.dispatcher.FilterDispatcher
            </filter-class>
        </filter>
        <filter-mapping>
            <filter-name>struts2</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    </web-app>

File : checkNameAction.java

package com.codeFactory;

import com.opensymphony.xwork2.ActionSupport;

public class checkNameAction extends ActionSupport {

    private String firstName;

    public String execute()
    {
        if (getFirstName().equals("admin"))
        {
            addActionMessage("Welcome admin.");
        } else
        {
            addActionError("Wrong input.");
        }
        return SUCCESS;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
}

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