统计网站访问量的小例子

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>");
}

}