Struts2 actionError and actionMessage | Code Factory
2 min readNov 29, 2019
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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;
}
}