基於servlet的統計網站訪問量的小栗子：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public
 
 class Aservlet extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        ServletContext app = this.getServletContext();

        Integer count = (Integer)app.getAttribute("count");

        if (count==null
 
) {
            app.setAttribute("count", 1);
        }else{
            app.setAttribute("count", count+1);
        }

        PrintWriter pw = response.getWriter();

        pw.print("<h1>"+count+"<h1>");
    }

}