package servlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
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;
@WebServlet("/HelloName")
public class HelloName extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf8");
PrintWriter out = response.getWriter();
out.println("");
out.println("");
String title = "Hello + Name page";
out.println("" + title + "");
out.println("");
out.println("");
out.println("");
out.println("" + title + "
");
// Сессия начало
HttpSession session = request.getSession(true);
String savedLastName = (String) session.getAttribute("savedLastName");
if ((savedLastName != null) && (savedLastName != "")) {
String heading;
Integer accessCount = new Integer(0);
if (session.isNew()) {
heading = "Welcome, Newcomer";
} else {
heading = "Welcome Back";
Integer oldAccessCount = (Integer) session
.getAttribute("accessCount");
if (oldAccessCount != null) {
accessCount = new Integer(oldAccessCount.intValue() + 1);
}
}
session.setAttribute("accessCount", accessCount);
// Сессия конец
// Сессия отображение начало
out.println("
");
out.println("" + heading + "
\n");
out.println("Information on Your Session:
\n");
out.println("\n");
out.println("\n");
out.println("| Info Type | Value\n");
out.println(" |
\n");
out.println("| Фамилия\n");
out.println(" | " + session.getAttribute("savedLastName") + "\n");
out.println(" |
\n");
out.println("| ID\n");
out.println(" | " + session.getId() + "\n");
out.println(" |
\n");
out.println("| Creation Time\n");
out.println(" | " + new Date(session.getCreationTime()) + "\n");
out.println(" |
\n");
out.println("| Time of Last Access\n");
out.println(" | " + new Date(session.getLastAccessedTime()) + "\n");
out.println(" |
\n");
out.println("| Number of Previous Accesses\n");
out.println(" | " + accessCount + "\n");
out.println(" |
\n");
out.println("
");
}
// Сессия отображение конец
String firstName = request.getParameter("firstName");
if (firstName == null) {
out.println("Введите Ваше имя.");
}
out.println("
");
out.print("
");
out.println("");
out.println("");
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
doGet(request, response);
String firstName = request.getParameter("firstName");
PrintWriter out = response.getWriter();
if ((firstName == null) || (firstName == "")) {
out.print("Вы не ввели имя.");
} else {
out.println("");
out.println("");
out.println("
Hello, " + firstName + "!
");
out.println("");
out.println("");
}
}
}