package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class LoginServletTest
*/
@WebServlet("/LoginServletTest2")
public class SessionCounter extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @throws IOException
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// PrintWriter out = response.getWriter(); IOException {
// TODO Auto-generated method stub
// doPost(request, response);
HttpSession session = request.getSession(true);
Object counter = session.getAttribute("Counter");
int count = 0;
if (counter == null) {
response.setContentType("text/html;charset=utf8");
request.setCharacterEncoding("utf8");
response.getWriter().println("<p>這是你第一次訪問本頁<p>");
count = 1;
session.setAttribute("Counter", new Integer(1));
} else {
count = ((Integer) counter).intValue();
count++;
session.setAttribute("Counter", new Integer(count));
response.setContentType("text/html;charset=utf8");
request.setCharacterEncoding("utf8");
response.getWriter().println("<p>這是你第</p>" + count + "<p>次訪問本頁<p>");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
String name = request.getParameter("name");
String passs = request.getParameter("pass");
PrintWriter out = response.getWriter();
out.println("<HTML>");
out.println(" <HEAD><TITLE>用戶登錄</TITLE></HEAD>");
out.println(" <BODY>");
if ("123".equals(passs)) {// 假設的合法用戶名及密碼
out.print("<h2>用戶登錄成功</h2>");
} else {
out.print("<h2>用戶或密碼錯誤，登錄失敗</h2>");
}
out.println(" </BODY>");
out.println("</HTML>");
}
}Servlet和Session統計訪問次數
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