Sending string from JSP to Servlet through hidden input type trims the string

I am trying to send a string from my JSP to the Servlet after a button is clicked. Currently I am doing in JSP:

  <form method="POST" action="/deleteList.html">
      <input type="submit" value="delete me!"/>
      <input type="hidden" name="deleteStringName" value=<%=somevalue%> />
  </form>

And Servlet:

String desiredString = request.getParameter("deleteStringName");

This works when somevalue doesn't include whitespaces, such as string test123 would be printed the same in JSP as Servlet. However, with string such as test 132, if I were to print the string in the servlet:

String desiredString = request.getParameter("deleteStringName");
System.out.println(desiredString);

this would print just test omitting everything after whitespace. Why does this happen? And is there a way to fix it such that I could transmit the entire string from JSP to servlet? Thank you