Struts2 example with Annotation. Struts 2 with annotation. First Struts 2 with annotation. ~ balaram

Tuesday, October 9, 2012

Struts2 example with Annotation. Struts 2 with annotation. First Struts 2 with annotation.

1. Create one Dynamic Project in Eclipse Say StrutsAnno
2. Put all these below jar file inside WEB-INF\lib folder
struts2-core-2.1.6.jar
xwork-2.1.2.jar
commons-logging-1.1.jar
freemarker-2.3.8.jar
ognl-2.6.11.jar
struts2-convention-plugin-2.1.6.jar

3. Change your web.xml (WEB-INF\web.xml) file as below:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Struts2 First Example </display-name>
<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>

<welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

</web-app>

There is no use of struts.xml if you use Annotation. :)

4. Create one package inside src folder say binod.suman
UserAction.java (StrutsAnno\src\binod\suman\UserAction.java)

package binod.suman;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;

public class WelcomeUserAction {
private String userName;
private String message;

@Action(value="/welcome",results={@Result(name="success",location="/successPage.jsp"),@Result(name="error",location="/error.jsp")})
public String execute() {
message = "Welcome " + userName + " !";
System.out.println("Message : "+message);
if(userName.equals("Binod")){
return "success";
}else{return "error";}
}

public void setUserName(String userName) {
this.userName = userName;
}

public void setMessage(String message) {
this.message = message;
}

public String getUserName() {
return userName;
}

public String getMessage() {
return message;
}
}

5. These below JSP page inside the WebContent
index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@taglib uri="/struts-tags" prefix="s" %>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Hello World</title>
    </head>
    <body>
        <s:form action="welcome" >
            <s:textfield name="userName" label="User Name" />
            <s:submit />
        </s:form>
    </body>
</html>

error.jsp

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Some Error</title>
<link rel="stylesheet" href="mystyle.css" type="text/css" />
</head>
<body>
<h1>Error!</h1>
This error page is being shown because any of following reasons:
<ul class="boldred">
<li>Field(s) left blank.</li>
<li>Invalid Data Entered.(For example: String in place of Integer.)</li>
</ul>

<h1> You have entered <font color="red"> <b><s:property value="userName"/></b> </font> but you should suppose to enter <b>Binod</b> </h1>
</body>
</html>

successPage.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Welcome User</title>
</head>
<body>
<b><s:property value="message"/></b>.
</body>
</html>

Only one web.xml, one java class and some jsp pages.

http://localhost:8080/StrutsAnno/

Put UserName Balaram
Output:
Welcome Balaram !.

balaram

Tuesday, October 9, 2012