onClick function call using scriptlet

Question

I want to use scriptlet to write the function called when clicking the Execute Test button This code didn't work :

Here's my jsp code :

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
  <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
 </head>
 <body>

<html:file properties="tonFichier" name="tonForm"/>
<%!

 public void executeTest() {

  java.util.Date d = new java.util.Date();
  System.out.println(d.toString()); } 

 %>

 <form enctype="multipart/form-data" method="get">


  <div>
  <input type="submit" value="Execute Test" onclick="executeTest()" >

  </div>
   </form>
  </body>
   </html>

Any help please Cheers

At a glance, there is no event handling mechanism supported by JSP (or Servlet). — Lion
– Lion, Commented Jul 8, 2012 at 19:19

Lion · Accepted Answer · 2012-07-08 19:30:18Z

4

You can do as follows.

if(request.getParameter("btnSubmit")!=null) //btnSubmit is the name of your button, not id of that button.
{
    java.util.Date d = new java.util.Date();
    System.out.println(d.toString()); 
}

<input type="submit" id="btnSubmit" name="btnSubmit" value="Execute Test"/>

onclick="executeTest()" with your button tries to invoke a Javascript function. Change your button tag as mentioned in the above code and encolse this code within a sciptlet. It will do the job when you click this button.

Additionally, you may want to replace

System.out.println(d.toString());

with

out.println(d.toString());

in your code.

Also, in your form tag,

<form enctype="multipart/form-data" method="get">

the attribute enctype="multipart/form-data" is required when you're uploading files. You should remove it, if such is not a case and

method="post"

The form attribute enctype="multipart/form-data" can not work, if you use method="get"

edited Jul 8, 2012 at 19:30

answered Jul 8, 2012 at 19:22

Lion

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2 Comments

Amira Manai Over a year ago

Thank you so much , but in my case i want to use java code because i want to execute a maven command after clicking on the button is it possible to execute commands using javascript??

Lion Over a year ago

@Amira Manai:) You can surely use Java code to execute maven commands but you can't using Javascript because Javascript is a client-side scripting language running on a browser (and not on a server as done with Java).

shawnt00 · Accepted Answer · 2012-07-08 19:20:30Z

1

I think you're confusing Java functions and Javascript functions i.e., server-side vs client-side.

answered Jul 8, 2012 at 19:20

shawnt00

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Comments

user2550873 · Accepted Answer · 2013-11-08 16:51:31Z

0

We cannot call the functions which are written in jsp page using java. We can use the javascript for creating events and submit the values to the another jsp page for further processing.

answered Nov 8, 2013 at 16:51

user2550873

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