title: Remove special characters from a string in JSTL
body: <p>I have a string in jstl: 'Tall &amp;. Big'
  But I want this to replace with :'TallBig'.</p>
  
  <p>I am trying to this by using fn:replace(String,'&amp;',''); but I don't know how to mention multiple characters in this function to be removed.</p>
  
  <p>Means I want to remove all special characters from a string.</p>