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struts 1x Dispatch Action with example program In Eclipse

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 DispatchAction Class

  • In DispatchAction we can use more methods to control one action,one model,one controller,one view page. 
  • For example  will use more button in one page like add, delete, update to control one controller and model class.
  • Here  class UserAction extends org.apache.struts.actions.DispatchAction. Normal Action class invoke execute() method.But in this This class not invoked execute() method.It will be  invoked separate method  like as method=”add” ,method=”delete”,method=”update”  which  the method  will be use the parameter in the view page. 

Step by Step tutorial on running  your  DispatchAction  Struts application in Tomcat5.5 with Eclipse IDE

Step – 1 Creating Dynamic web Project

Step – 2 DispatchAction  STRUTS folder structure

Step – 3 Creating your DispatchAction Struts program(Controller)

Step – 4 Creating web.xml for DispatchAction struts application

Step – 5 Creating Struts-config.xml

Step – 6 DispatchAction  Struts view page

Step – 7 How to Add server in  DispatchAction  Struts application

Step – 8 OutPut  for  Running  DispatchAction  Struts application

 

SOURCE CODE

 Start Eclipse and goto File -> New -> Project -> Dynamic Web Project

Following is the list of required JAR files to be added in Java Class Path of your project. Download displaytag JAR files from

JAR FILES + TLD FILES

Step – 2 DispatchAction  STRUTS folder structure

 Lib folder


 

Download The Following TLD files  and paste into WEB-INF

                                                                                                                                                                                                                     

                   

                           

                   

Step – 3 Creating your DispatchAction Struts program(Controller & MyModel)

UserAction.java


package Com.Candidjava;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.actions.DispatchAction;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;

public class UserAction extends DispatchAction {

	private final static String SUCCESS = "success";

	public ActionForward add(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		UserForm userForm = (UserForm) form;
		userForm.setMessage("Inside add user method.");
		return mapping.findForward(SUCCESS);
	}

	public ActionForward update(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		UserForm userForm = (UserForm) form;
		userForm.setMessage("Inside update user method.");
		return mapping.findForward(SUCCESS);
	}

	public ActionForward delete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		UserForm userForm = (UserForm) form;
		userForm.setMessage("Inside delete user method.");
		return mapping.findForward(SUCCESS);
	}
}

UserForm.java


package Com.Candidjava;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionForm;

public class UserForm extends ActionForm {

	private String message;

	public String getMessage() {
		return message;
	}

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

}

Step – 4 Creating web.xml for DispatchAction struts application

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>

	<display-name>Struts Blank Application</display-name>

	<servlet>
		<servlet-name>action</servlet-name>
		<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
		<init-param>
			<param-name>config</param-name>
			<param-value>/WEB-INF/struts-config.xml</param-value>
		</init-param>
		<init-param>
			<param-name>debug</param-name>
			<param-value>2</param-value>
		</init-param>
		<init-param>
			<param-name>detail</param-name>
			<param-value>2</param-value>
		</init-param>
		<load-on-startup>2</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>action</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<taglib>
		<taglib-uri>/tags/struts-html</taglib-uri>
		<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
	</taglib>
	<taglib>
		<taglib-uri>/tags/struts-bean</taglib-uri>
		<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
	</taglib>

</web-app>

Step – 5 Creating Struts-config.xml


<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>
	<form-beans>
		<form-bean name="UserForm" type="Com.Candidjava.UserForm" />

	</form-beans>

	<action-mappings>
		<action input="/index.jsp" parameter="method" name="UserForm"
			path="/UserAction" type="Com.Candidjava.UserAction">
			<forward name="success" path="/index.jsp" />
		</action>

	</action-mappings>

</struts-config>

Step – 6 DispatchAction  Struts view page 

index.jsp


<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<%@taglib uri="/WEB-INF/struts-html-1.1.tld" prefix="html"%>
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript">
	function submitForm() {
		document.forms[0].action = "UserAction.do?method=add";
		document.forms[0].submit();
	}
</script>
</head>
<body bgcolor="pink">
<html:form action="/UserAction.do">
	<table>
		<tr>
			<td><bean:write name="UserForm" property="message" /></td>
		</tr>
		<tr>
			<td><html:submit value="Add" onclick="submitForm()" /></td>
		</tr>
		<tr>
			<td><html:submit property="method" value="update" /></td>
		</tr>
		<tr>
			<td><html:submit property="method">delete</html:submit></td>
		</tr>
	</table>
</html:form>
</body>
</html>

               

Step – 7 How to Add server in  DynaActionForm  Struts application

Window –>show view—->servers—>add new–>         

Select ther version which you installed in your System

How to run the Project:

Right click on project name———–>click Run As —> Run On Server

Step – 8 OutPut  for  Running  DynaActionForm  Struts application

DOWNLOAD + SOURCE CODE      

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