java - Passing an ArrayList of a class from a jsp to a servlet -


I have an ArrayList of a class room, I need to send a jsp to servlet

It seems that an HTML or jsp can send a value for a sublet through a form, the method I tried to give it as a hidden parameter as follows: 

  & Lt; Input type = "hidden" name = "allRooms" value = "& lt;% = request.getAttribute (" allRooms ")%>" / & Gt;   
 But the way I submit this form, I get a compilation error "string can not be converted to list" for the following:  
 < Code> list & lt; Cell & gt; AllRooms = (list & lt; cell & gt;) request.getParameter ("allRooms");   
 Change the first parameter to the object type first and then converting it to the shown list below gives the only exception, but this time as a runtime exception:  < Pre>  object a = (object) request.getParameter ("allRooms"); & Lt; Cell & gt; AllRooms = (list & lt; cell & gt;);   
 Is there a method to pass the list in the sublet or should I set it as a session variable in JSP?  
 Thanks in advance.   
 Use  session . This is a best solution.  
  ARLL  to send through the HTML form. Instead use  session

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