AJAX in JSP

[haiforhussain]

How to implement AJAX in JSP ...
can anyone pls give me an example....

[freddieMaize]

Hi hussain,
its there in the W3schools dude.. You even have sample code in it.. refer them and post your doubts if any..

[haiforhussain]

Hi hussain,
its there in the W3schools dude.. You even have sample code in it.. refer them and post your doubts if any..

hi
I have checked in w3schools.com ... but they given example for asp and php only ... i have searched in google also ... everywhere there is an example for asp and php only ....

[freddieMaize]

Hi hussain,

use the below code and modify accordingly............

 <script language="JavaScript">
                
                function ajax()
                {   
                    var xmlHttp;
                    try
                    {  // Firefox, Opera 8.0+, Safari 
                        xmlHttp=new XMLHttpRequest();
                    }
                    catch (e)
                    {  // Internet Explorer  
                        try
                        {    
                            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");  
                        }
                        catch (e)
                        {   
                            try
                            {     
                                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");   
                            }
                            catch (e)
                            {    
                                alert("Your browser does not support AJAX!");   
                                return false;    
                            } 
                        } 
                    }
                    xmlHttp.onreadystatechange=function()
                    {
                        if(xmlHttp.readyState==4)
                            {
                               
                                var resultTxt=xmlHttp.responseText;
                             //resultTxt would be your result that you send from the servlet
                            }
                        }
                        var any_parameter= document.formName.any_parameter.value;                      
                        var url="servletName";
                        url=url+"?any_parameter="+any_parameter;//any_parameter- this can be a value of a textbox or something
                        
                        xmlHttp.open("GET",url,true);
                        xmlHttp.send(); 
                    }
                    
                    
            </script>

try it........
post if you have any doubts in the above code.........

cheers..................:)
freddie

[haiforhussain]

hi freddie
Can u pls explain me how to pass a data from HTML page to JSP ... and how to get the data from jsp using AJAX ....

cheers
hussain

[refereence2me]

Hi,

You can pass data from html through hidden parameters...

From JSP to AJAX the example is already discussed above..

[o0JSP]

why not to use DWR? it can help you to use AJAX in an easy way.

[pao]

hi freddie
Can u pls explain me how to pass a data from HTML page to JSP ... and how to get the data from jsp using AJAX ....

cheers
hussain

I think Freddie gave you a pretty decent example of how to implement AJAX.... You see you need to replace the string value "servletname" with the servlet you wish to handle you request. Pass params to the servlet with the url first (its easier) capture them on the servlet with request.getParameter calls. When you have your values, do your workings and write the response back.... In that way you will have successfully passed your values back to the jsp\servlet without submitting the form and posting back to your own page.

[freddieMaize]

Hi hussain,
Are you still having the doubt?

And are you sure about your question. I mean

Can u pls explain me how to pass a data from HTML page to JSP

If that is the case then you can use hidden fields (like one of our friend mentioned).

Regards,
Freddie