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Struts 2: how to set response for ajax function call?

Ramesh Babu Essampalli
Greenhorn

Joined: Oct 19, 2009
Posts: 5
i am calling an ajax function from jsp page. The execute method of action class is getting called.

now, i want to set response parameter in execute methood for xmlhttp.responseText in ajax function call. i implemented ServletResponseAware and in setServletResponse method i set response parameter. but the response param value is over-written by return page of execute method. please suggest me a way to set response param.

please find below my ajaxcall in javascript:



here is my action class:



Thanks.
Ankit Garg
Sheriff

Joined: Aug 03, 2008
Posts: 9304
    
  17


You must be talking about this piece of code. When your action sends the request to a JSP page, this content will be ignored. If you don't want to send the request to the JSP, then return null from the execute method. You can't send response from action and JSP both...


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Ramesh Babu Essampalli
Greenhorn

Joined: Oct 19, 2009
Posts: 5
thanks a lot ankit it works after returning null from action class.
David Newton
Author
Rancher

Joined: Sep 29, 2008
Posts: 12617

Why aren't you using a JavaScript library for the client side functionality?

Why are you using the parameter map when Struts 2 provides the means to avoid all those machinations?
Ramesh Babu Essampalli
Greenhorn

Joined: Oct 19, 2009
Posts: 5
david,

i am trying to create dynamic textfields on ajax function call. it was suggested in the link below:

http://www.coderanch.com/t/468632/Struts/null-pointer-exception-struts

but was facing problem in returning values into response. that is now solved after returning null from the action class.

but now, i have another issue related to it.

i have a list of textfields in the jsp shown below:



i have added mylist variable into my action class. and adding a value to mylist on ajaxcall. please refer my modified action class below:



but the change in value of mylist is not adding a textfield into the jsp page. please give me some direction to add the textfield dynamically using ajax. thanks.
Ramakrishna Udupa
Ranch Hand

Joined: Aug 09, 2013
Posts: 253
Hi everybody,

Ramesh, I copied your code(1st time you posted) and run. It works great. First of all thanks, Actually I was looking for the similar kind of code for my requirements. Now A small modification in that program. In your original program when I click on the submit button, The page getting refresh every time. I don't want to refresh the page when I click on submit button. I've requirement like, I'm Having a JSP page, Contains *User-Info* like name, age, address, country, zip, gender etc., (Using struts-2 and ajax tags). In the same page, I've HTML-Table contains these *User-Info* as headers. When the user clicks on submit button, All the data, what he entered in the form should populate on the Html table in the first row(always, without refreshing the page) and when he clicks on particular row in the table, the information should re-populate on the form( for these two process Action should call but page reload should not). The HTML-table contains maximum of 5 rows. If he entered sixth row, then pagination required. I want to do this in struts 2 - ajax. I'm new to Ajax and jQuery. I'm thinking to do this using ajax(server side), jQuery(client side). But I've no exact vision how to do this. Can you please tell me how to do this. If possible please send me a sample code. My mail-id is ramakrishna.kc@dioxe.com.


Ankit, I really din't get what you said. Please can you explain in detail.


David, Is that really necessary to use JavaScript library for the client side functionality?


Thanks:
Ramakrishna k.c
 
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