📄 sessionservlet.java.001
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package com.tarena.serv.state;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class SessionServlet extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession();
Integer count = (Integer) session.getAttribute("count");
if (count == null) {
count = 1;
} else {
count = count + 1;
}
session.setAttribute("count", count);
response.setContentType("text/html;charset=gbk");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>counter</title>");
out.println("</head>");
out.println("<body>");
out.println("<h3 align=\"center\">" + count + "</h3>");
out.println("<hr>");
String pageURL = "/serv-guides/state/session";
pageURL = response.encodeURL(pageURL);
out.println("<a href=\"" + pageURL + "\">refresh</a>");
out.println("<hr>");
out.println(session.getId());
out.println("</body>");
out.println("</html>");
}
}
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