Skip to main content

Using struts2-jquery for Ajax

Now struts2 is providing support for the most popular client side javascript JQuery using plugin (struts2-jquery-plugin-2.5.1.jar). you can implement ajax based funcationalities into your application without any effort and without writing any other javascript. strut2 was using dojo based support for ajax in pervious version but now they have implemented JQuery based ajax features. you need to download struts2-jquery-plugin-2.5.1.jar and set it in your application's classpath.
To support the JQuery based fucntionality, you need to include extra jsp taglib into you jsp page. Following is the simple exambple using JQuery plugin in JSP page.

Index.jsp

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

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

<html>

 <head>

    <sj:head jqueryui="true" jquerytheme="redmond" />

  </head>

  <body>

    <sj:a id="ajaxlink" 

        href="ServerTime" 

        targets="result" 

        indicator="myDefaultIndicator" 

        button="true" 

        buttonIcon="ui-icon-refresh"

    >

        Run AJAX Action

    </sj:a>

    <div id="result">Result will be here.</div>

    

    <img id="myDefaultIndicator" src="ajax-loader.gif" alt="Loading..." style="display:none"/>

  </body>

</html>




JSP page to be shown for result "ServerTime.jsp"
<%=""+new java.util.Date()%>

Action class "ServerTime.java"
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
public class ServerTime extends ActionSupport {
    public String execute(){
        System.out.println("Server time checked");
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace(System.out);
        }
        return SUCCESS;
    }
}

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" />
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <package name="/" extends="struts-default">
        <action name="ServerTime" class="ServerTime">
            <result>/ServerTime.jsp</result>
        </action>
    </package>
</struts>


Labels:

Comments

Anonymous said…
sorry but your example is wrong you include the right taglib, but you use the old dojo (sx tags) head and div tags.
February 3, 2011 at 2:03 AM
Hemraj said…
thank you for suggestion. That was by mistake. Actually I tested this program using dojo also.
February 3, 2011 at 1:51 PM
bootstrap said…
hi how can i display variables from the index page on the result page
May 6, 2011 at 8:05 PM
javajoseph said…
It was mind blowing thank you for this kind of help by coding.I really appreciate that.
March 29, 2012 at 2:20 PM
Lijo p said…
How can I use submit button with above example?
January 3, 2013 at 12:31 PM
Post a Comment

Popular posts from this blog

Using HyperSQL (HSQLDB)

HSQLDB is a portable RDBMS implemented in pure java. It can be embedded with your application as well as can be used separately. It is very a small database that supports almost all features of the standard database system. It comes with small jar file that can be found in lib folder. The HSQLDB jar package is located in the /lib directory of the ZIP package and contains several components and programs. Core components of jar file are : HyperSQL RDBMS Engine (HSQLDB), HyperSQL JDBC Driver, Database Manager, and Sql Tool. Installing and Using Download: download latest release of HyperSQL database from http://hsqldb.org website and extract it. You will see following contents. Here "bin" directory contains some batch files those can be used to run a swing based GUI tool. You can use runManagerSwing.bat to connect to database, but database must be on before running it. Directory lib contains File hsqldb.jar . It is the database to be used by you. Running database First ...
17 comments
Read more

In Process Mode of HSQLDB in web application.

If you want to use the database into your web application, you can use the HSQLDB in In_Process mode. In this mode, you can embed the HSQLDB into your web application and it runs as a part of your web application programm in the same JVM. In this mode, the database does not open any port to connect to the application on the hosing machine and you don't need to configure anything to access it. Database is not expposed to other application and can not be accessed from any dabase tools like dbVisualizer etc. In this mode ,database will be unknown from any other person except you. But in the 1.8.0 version, you can use Server intance for external as well as in process access.  To close the databse, you can issue SHUTDOWN command as an SQL query.   In the in-process mode, database starts from JDBC with the associated databse file provided through  connection URL. for example   DriverManager.getConnection("jdbc:hsqldb:mydatabase","SA","");   Here myd...
8 comments
Read more

How to handle values from dynamically generated elements in web page using struts2

Some time you will see the form containing the button " Add More " . This facility is provided for the user to get the values for unknown number of repeating for some information. for example when you are asking to get the projects details from user, you need to put the option to add the more project for the user since you don't known how many projects user have. In the HTML form, you repeat the particular section to get the multiple values for those elements. In Html page , you can put the option to add new row of elements or text fields by writing the java script or using JQuery API. Now, the question is that how to capture the values of dynamically generated text fields on the server. Using the servlet programming you can get the values by using getParameters() method that resultants the array of the parameter having the same name. But this limit you to naming the text fields in the HTML form. To ally this approach, you have to take the same name for t...
24 comments
Read more