Notice the tag . It indicates the place where to include dynamic part from the servlet in the Web page. This tag has an attribute CODE , showing the name of the dynamic part.

The servlet HelloWorld, executing the analysis of the HTML page above, could look like this :

import javax.servlet.*;
import java.servlet.http.*;
import com.jsip.* ;

public class HelloWorld extends HttpServlet {
  public void doGet(HttpServletRequest req, HttpServletResponse res)
throws
  ServletException, IOException) {
    PrintWriter out = res.getWriter();
I   Page p = new Page("HelloWorld.html") ;
    p.put("Hello","Hello World !");
    p.put("ByeBye","ByeBye !");
    out.print(p.toString()) ;
  }
}

• This servlet allows to separate the source code from the HTML page.
• Notice the compacity of source code both for HTML part and servlet part.
• tags can be repeated with the same CODE attribute ; the same dynamic content will be added.
• If all tags are not defined in the servlet, they will be replaced by blank content in the HTML page.
• JSIP, this elegant solution is provided under the licence haeding the class Page.java.

About Christophe Roux

• ch_roux@club-internet.fr