Calling java code from java script in JSP

Question

I am newbie in UI i.e. front end. I am using Javascript and JSP. I need to perform the below task.

I have a textarea in jsp page which gets populated from a text file which i read using Java. Now, I want to empty the text area and that text file on clicking a button. Emptying the file is not an issue only i don't get how to transfer call from jsp file to Servlet on clicking that button.

Please help.

response.sendRedirect("ProjectName/ServletName?param1`=value1") — KhAn SaAb
– KhAn SaAb, Commented May 21, 2013 at 12:29

rawphl · Accepted Answer · 2013-05-21 12:31:27Z

2

There are two ways to do this:

the classical way is form submission:

http://www.tutorialspoint.com/jsp/jsp_form_processing.htm

e.g. you embedded a form in your jsp page that will send the data to your server when submitted.

the second way is via ajax

https://en.wikipedia.org/wiki/Ajax_(programming)

I would suggest you google for the basics of form submission (which is not jsp specific) or doing ajax requests with javascript (with a library, for example jquery)

answered May 21, 2013 at 12:31

rawphl

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user2380133 · Accepted Answer · 2013-05-21 12:35:08Z

0

there are two ways one by jsp and another by javascript

if the button is submit type and if you are using a form then

if the button is simple a button then

function x() { window.location.replace("servlet name"); }

please tell me if you have any doubts

answered May 21, 2013 at 12:35

user2380133

Comments

Community · Accepted Answer · 2020-06-20 09:12:55Z

0

There are many ways to do so.

use jquery and ajax, its so easy.

similar question here: jQuery Ajax POST example with PHP

you can find documentation here http://api.jquery.com/jQuery.ajax/

or use JSNI.

https://developers.google.com/web-toolkit/doc/latest/DevGuideCodingBasicsJSNI

edited Jun 20, 2020 at 9:12

CommunityBot

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answered May 21, 2013 at 13:05

user2405098

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