title: Escaping HTML characters in JSP without special library
body: <p>I'm a new programmer at a software house, and let's just say I can't make too much modification that includes a major changes, for example like adding library. In the current project, we're using JSP and Servlet, and some other advanced GUI that I never knew (they said it's a derivative of Eclipse, called Enfinity). The Enfinity also hides the libraries under obscure locations, and it's very different than in Java. So I don't think I will able to understand about the library location too, moreover adding some new library.</p>
  
  <p>The problem here, I need to escape HTML characters like &amp;, &lt;, >, ", and ', but when I search solution on the internet, usually the solution involves using JSTL ( c:out or ${fn:escapeXML} ) or importing a library (Spring's HTMLEscape, or Apache's StringEscapeUtils). JQuery, on the other hand, is imported, but sadly, not related to solution. But the problem is JSTL is not part of the library readily imported into the project. Java, JSP, and Servlet are kinda new to me, as I didn't get Java at all in my college, so I don't know either what library is standard in JSP (already present, without I have to add it physically). I don't even know whether the Apache's StringEscapeUtils is present or not. Do you have any suggestion / codes on how I should escape the HTML characters under my circumstances? Thank you very much.</p>