There are following step for using Ajax with Struts2.
1. create a web based application in your IDE.
2. you need include the basic jar files to run struts2 application.
3. Include the struts2 FilterDispatcher Listener entry into web.xml file.
4. Now create a struts.xml file into your src folder and do entry for action request process.
5. Now create the Struts2 Action class
6. Create the JSP page .
Now start your server and use URL to check this example:
If you have any question so please free feel to ask.
1. create a web based application in your IDE.
2. you need include the basic jar files to run struts2 application.
3. Include the struts2 FilterDispatcher Listener entry into web.xml file.
<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>4. Now create a struts.xml file into your src folder and do entry for action request process.
<!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" /> <package name="struts2" extends="struts-default" namespace="/"> <action name="ajaxExample" class="com.example.actions.AjaxAction" > <result>/ajax.jsp</result> </action> <action name="callAJax" class="com.example.actions.AjaxAction" method="ajaxMethod"> <result type="stream"> <param name="contentType">text/html</param> <param name="inputName">inputStream</param> </result> </action> </package></struts>5. Now create the Struts2 Action class
package com.example.actions;import java.io.InputStream;import java.io.StringBufferInputStream; import com.opensymphony.xwork2.ActionSupport;public class AjaxAction extends ActionSupport { private String intValue; private InputStream inputStream; public InputStream getInputStream() { return inputStream; } public String ajaxMethod() { System.out.println("Hello i m ajax Methods"); System.out.println("intValue "+intValue); int myVal = 0; try{ myVal=Integer.parseInt(intValue); inputStream=new StringBufferInputStream(""); }catch (Exception e) { inputStream=new StringBufferInputStream("Value Should be Numberic"); } return SUCCESS; } public String execute() { return SUCCESS; } public String getIntValue() { return intValue; } public void setIntValue(String intValue) { this.intValue = intValue; }}6. Create the JSP page .
<%@taglib prefix="s" uri="/struts-tags"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>AJAX JSP PAGE - AOI BLOG</title> <script type="text/javascript"> var httpObject = null;// Get the HTTP Object function getHTTPObjectForBrowser(){ if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP"); else if (window.XMLHttpRequest) return new XMLHttpRequest(); else { alert("Browser does not support AJAX..........."); return null; } }// Change the value of the outputText field function setAjaxOutput(){ if(httpObject.readyState == 4){ document.getElementById('intValueDiv').innerHTML = httpObject.responseText; } }// Implement business logic function doAjaxCall(){ httpObject = getHTTPObjectForBrowser(); if (httpObject != null) { httpObject.open("GET", "callAJax.action?intValue="+document.getElementById('intValueId').value, true); httpObject.send(null); httpObject.onreadystatechange = setAjaxOutput; } }//--></script> </head> <body> <center> <h1> Use Ajax in Struts2 </h1> </center> <div id="intValueDiv" style="color: red;font-weight: bold"></div> Please Enter the Integer value : <s:textfield value="" id="intValueId" name="intValue" theme="simple" onblur="doAjaxCall();"></s:textfield> <br /> <s:submit value="submit" align="left"></s:submit> </body></html>Now start your server and use URL to check this example:
http://localhost:8080/yourprojectname/ajaxExample.action If you have any question so please free feel to ask.
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