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Answer 1

+5 A:

I don't see why it wouldn't be possible. A JSP is just another way of writing a Servlet, so you should be able to create classes as static (or for that matter, non-static) inner classes within the Servlet, as you would any other class, using the <%! %> convention.

I was able to do a quick, functional, proof of concept:

<%@page contentType="text/html" pageEncoding="MacRoman"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd"&gt;
<%!
private static class NdBadIdea {
  private final int foo = 42;

  public int getFoo() {
    return foo;
  }
}
%>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=MacRoman">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Hello World!</h1>
        <%=new NdBadIdea().getFoo()%>
    </body>
</html>

Jack Leow 2010-02-09 02:02:06

`static` class is a better idea here, IMO. +1

Adeel Ansari 2010-02-09 02:04:27

Ahh, I see what I did wrong - no exclamation mark. Thank you! @Vinegar, yes `static` does seem like a better option. Thanks!

Vivin Paliath 2010-02-09 02:12:17

Answer 2

+1 A:

Just for information: code snippet from the question declares a nested class (i.e. a class, declared inside a method body). It would be legal without public keyword:

<%      
    class Person { 
        ...
    }
%>

axtavt 2010-02-09 02:22:03

Oh, thanks for that bit of information!

Vivin Paliath 2010-02-09 06:02:20

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Defining a class in a JSP

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