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How to retain checked checkboxes after submitting the form to same page in jsp ?

Posted on 2015-02-14
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Last Modified: 2015-02-15
I have a form in JSP.
When I check any 3 checkboxes and submit the form I want the checked checkboxes to retain their state.
How to achieve this using javascript ?


<html>
<body>

<form action="">
<input type="checkbox" name="axes" value="Time">Time<br>
<input type="checkbox" name="axes" value="Product">Product<br> 
<input type="checkbox" name="axes" value="Location">Location<br> 
<input type="checkbox" name="axes" value="Sore">Store<br> 
<input type="submit" value="submit">
</form>

</body>
</html>

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Question by:Pradip Shenolkar
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3 Comments
 
LVL 28

Accepted Solution

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rrz earned 2000 total points
ID: 40610982
Please try this code.
<%@ page import="java.util.*" %>
<html>
<body>
<% 
   String[] axes = request.getParameterValues("axes");
   if (axes != null) 
   {
   	  String check = "checked='checked'";
      List list = Arrays.asList(axes);
	  if(list.contains("Time"))pageContext.setAttribute("time", check);
	  if(list.contains("Product"))pageContext.setAttribute("product", check);	
	  if(list.contains("Location"))pageContext.setAttribute("location", check);
	  if(list.contains("Store"))pageContext.setAttribute("store", check);		 
   }
%>
<form>
<input type="checkbox" name="axes" value="Time" ${time}/>Time<br>
<input type="checkbox" name="axes" value="Product" ${product}/>Product<br> 
<input type="checkbox" name="axes" value="Location" ${location}/>Location<br> 
<input type="checkbox" name="axes" value="Store" ${store}/>Store<br> 
<input type="submit" value="submit">
</form>
</body>
</html>

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Author Comment

by:Pradip Shenolkar
ID: 40611075
It solved the problem but it would be more helpful to me from my project perspective if the solution is achieved using javascript.
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LVL 28

Expert Comment

by:rrz
ID: 40611090
When the client submits the form, he creates a new request. The Javascript values from the previous page are lost. To use Javascript, you would have to store the data somewhere. You could use cookies or use localStorage (HTML5). Look at
http://www.tutorialspoint.com/javascript/javascript_cookies.htm
http://www.thesitewizard.com/javascripts/cookies.shtml
http://www.smashingmagazine.com/2010/10/11/local-storage-and-how-to-use-it/     
https://robert.accettura.com/blog/2012/01/17/localstorage-with-cookie-fallback/
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