JSP_00 - first experiments with Java Server Pages

The following document contains first experiments with Java Server Pages, processed by a Gefion LiteWebServer. For a better understanding, the reader should also consider the source code of this document and the Java classes it uses.

• File Inclusion
  the header and footer areas of this document have been included from separate files;
• JSP Expression
  today is the <%= java.text.DateFormat.getDateInstance().format(new java.util.Date()) %>
  (the field shown above has been created by evaluation of a JSP expression)
• JSP Declaration
  <%! int VisitCounter = 0; %> this is your <%= ++VisitCounter %>. visit of this page...
  (the visit counter has been implemented by means of a JSP declaration and a JSP expression. It will be incremented whenever this page is loaded - unless the underlying HTML document is changed or the server is restarted)
• JSP "page" Directive
  <%@ page info="JSP_00 - first experiments with Java Server Pages" %> "<%= getServletInfo() %>"
  (this "info" message has been set by means of a JSP "page" directive)
• JSP Bean Usage
  the following items illustrate the use of a bean from within a JSP document
  • Access to Bean Parameters
    Message = ""
    (the parameter "Message" has been set using a setProperty action and then read back using getProperty)
  • Invocation of Bean Methods
    Message = "<%= JSP_00.getMessage() %>"
    (this time the message has been obtained by directly calling the "getMessage" method of the JSP_00_Bean)
• JSP PlugIn Action
  the following applet has been inserted by means of a JSP PlugIn "Action" <%--
  (Your browser doesn't seem to support the Java plug-in) --%>