calling same servlet for two different button's action in jsp

[shashanka jena]

I have two button in a jsp page lets say "Add" and "Subtract" for add and subtraction operation respectively.For both the button can I wrirte a single servlet for doing the two differnet operations ?

[Christophe Verré]

Yes you can. You'll have to tell the servlet which action you wish to execute though. You could use a request parameter like "action=add", or "action=substract", depending on which button you press.

[Rahul Bhattacharjee]

Originally posted by Satou kurinosuke:
Yes you can. You'll have to tell the servlet which action you wish to execute though. You could use a request parameter like "action=add", or "action=substract", depending on which button you press.

action attribute in form element specifies the servelet name.The question is to have a single servler.

You can do this by many ways, one I have given below:

<FORM ACTION="/cool/javaranch">
..
..
..
<INPUT TYPE=SUBMIT NAME="test" VALUE="ADD">
<INPUT TYPE=SUBMIT NAME="test" VALUE="SUB">
</FORM>


Query for VALUE in the servlet and proceed accordingly.

An Example

[Jaikiran Pai]

Originally posted by Rahul Bhattacharjee:
action attribute in form element specifies the servelet name.The question is to have a single servler.

I think Satou kurinosuke was mentioning the same approach which you have posted. By "action" Satou kurinosuke meant, the activity that has to be performed by the servlet.

[Rahul Bhattacharjee]

I do not think shashanka jena wants two servlets.He needs a single servlet to handle both the type of requests.

[Rajesh Agarwal]

Sashanka,

On click of these buttons you can call javascript methods and post to a different servlet from there.

[Christophe Verré]

Jaikiran, thank you.
Yes, that is what I was meaning. The name of "action" was confusing. I was not talking about the form's action, but about the a request parameter called action :
MyServlet?action=add
or
MyServlet?action=substract