package package01; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * Servlet implementation class Report4 */ @WebServlet("/Report4") public class Report4 extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Report4() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.setContentType("text/html; charset=UTF-8"); PrintWriter out = response.getWriter(); HttpSession session = request.getSession(false); out.println(""); out.println(""); out.println(""); out.println(""); if (session == null){ session = request.getSession(true); session.setAttribute("counter", "1"); out.println("初回アクセスです
"); out.println("アクセス数:"+ session.getAttribute("counter")); }else{ int n = Integer.parseInt((String)session.getAttribute("counter")); session.setAttribute("counter", String.valueOf(n+1) ); out.println("アクセス数:"+ session.getAttribute("counter")); } out.println(""); out.println(""); out.close(); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TO