Veena wrote:
> Craig
>
> In Jason Hunter's Servlet pgmg book there is ex like this.he says,In b/w
> the <script runnat="server"> </script>,u can include any servlet code that
> should be placed outside the servlet's service method.I tried this,but it
> will be within service method.Any comments?
>
> Here is the jsp code
> hello3.jsp
> <HTML>
> <HEAD><TITLE>Hello</TITLE></HEAD>
> <BODY>
> <H1>
> Hello, <%= getName(request) %>
> </H1>
> </BODY>
> </HTML>
>
> <SCRIPT RUNAT="server">
> private static final String DEFAULT_NAME = "World";
>
> private String getName(HttpServletRequest req) {
> String name = req.getParameter("name");
> if (name == null)
> return DEFAULT_NAME;
> else
> return name;
> }
> </SCRIPT>
>
In JSP 1.0 and JSP 1.1 (it *really* matters what version of the JSP spec your
server implements), the equivalent syntax would be this: (note the "!" character):
<%!
private static final String DEFAULT_NAME = "World";
private String getName(HttpServletRequest req) {
String name = req.getParameter("name");
if (name == null)
return DEFAULT_NAME;
else
return name;
}
%>
This generates an instance variable DEFAULT_NAME (no problem sharing it because
it's a constant) and a function that becomes part of the generated class.
(Although why I'm helping people learn how to intermix Java code in their JSP pages
-- a style that I personally feel is fraught with problems -- is beyond me :-)
Craig
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