Ajax implementation in Struts 2 without jQuery plugin

 
AJAX is a technique for creating better, faster, and more interactive web applications. With AJAX, your JavaScript can communicate directly with the server, using the JavaScript XMLHttpRequest object. With this object, your JavaScript can transfer data with a web server, without reloading the page.
 
This post elaborates on how to implement Ajax in Struts 2 application.
 
** UPDATE: Struts 2 Complete tutorial now available here.
 

Action class

package com.simplecode.action;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import com.opensymphony.xwork2.Action;

public class AjaxAction implements Action
{

   private String userName;
   private InputStream inputStream;
	
   public String ajaxMethod()
   {
	System.out.println("ajaxMethod() is called");
	byte[] bArray;
		
	if(!userName.isEmpty())
	{
	bArray = ("Welcome " + userName).getBytes();
	inputStream = new ByteArrayInputStream(bArray);
	}
	else
	{
	bArray = ("User name cant be blank").getBytes();
	inputStream = new ByteArrayInputStream(bArray);
	}
	
	return SUCCESS;
  }

  public String execute()
  {
	return SUCCESS;
  }
	
  public String getUserName()
  {
	return userName;
  }

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

  public InputStream getInputStream()
  {
	return inputStream;
  }
}

Recommended reading:

• AJAX implementation in Struts 2 using JQuery and JSON

Jsp Pages

<%@taglib prefix="s" uri="/struts-tags"%>










Ajax implementation in Struts2





Please Enter your Name :



	

Also read:

• Integrating jQuery DataTable with Struts2 using Ajax to implement Gridview
• CRUD Operations in Struts 2 using jTable jQuery plugin via Ajax
• Autocomplete in Struts 2 using Jquery and JSON

Struts.xml

  /ajax.jsp


  
     text/html
     inputStream
  

Demo

 
On running the application
 

 
Now giving the input as Jamil, the following output is obtained
 

 
Here the struts 2 action is called onBlur() event automatically , and hence the above response is obtained in the webpage without refreshing the page.