import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* This servlet reads data(parameters name and surname) from an http request and
* adds them to the Session.
*
* @author Sofoklis Stouraitis
*/
public class AddDataToSessionServlet extends HttpServlet {
/**
* Handles HTTP POST requests.
*
* @param request
* the request object
* @param response
* the response object
*
* @throws IOException
* if an input or output error is detected when the servlet
* handles the POST request
* @throws ServletException
* if the request for the POST could not be handled
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html; charset=ISO-8859-7");
PrintWriter out = new PrintWriter(response.getWriter(), true);
/*
* Enable Session
*/
HttpSession session = request.getSession(true);
/*
* Gets name from html
*/
String name = request.getParameter("nameField");
/*
* Gets surname from html
*/
String surname = request.getParameter("surnameField");
try {
out.println("<html>");
out.println("<head>");
out.println("<Meta Http-Equiv='Content-Type' Content='text/html; Charset=windows-1253'>");
out.println("<title>AddDataToSessionServlet</title>");
out.println("</head>");
out.println("<body bgcolor='#99CCFF'>");
/*
* Converts the name from ISO-8859-1 to ISO-8859-7 (Greek) in case
* the user typed his/her name in Greek
*/
name = new String(name.getBytes("ISO-8859-1"), "ISO-8859-7");
/*
* Converts the surname from ISO-8859-1 to ISO-8859-7 (Greek)in case
* the user typed his/her surname in Greek
*/
surname = new String(surname.getBytes("ISO-8859-1"), "ISO-8859-7");
out.println("<h1>AddDataToSessionServlet is running...</h1>");
/*
* Checks if there is an empty field
*/
if (!(name.length() > 0) || !(surname.length() > 0)) {
out
.println("<h1>Δεν έχετε συμπληρώσει όλα τα στοιχεία σας!!!</h1>");
return;
}
/*
* Store name in a Session variable named sessionName
*/
session.setAttribute("sessionName", name);
/*
* Store surname in a Session variable named sessionSurname
*/
session.setAttribute("sessionSurname", surname);
out.println("<h2>Εισάγατε τα παρακάτω στοιχεία στο Session:</h2>");
out.println("<b>Όνομα: </b>" + name + "<br>");
out.println("<b>Επώνυμο: </b>" + surname + "<br>");
out.println("<br><a href='ReadDataFromSessionServlet'>Διάβασμα των μεταβλητών του Session από το ReadDataFromSessionServlet.java</a>");
out.println("</body>");
out.println("</html>");
} catch (Exception ex) {
out.println("Exception: " + ex.getMessage());
out.println("</body>");
out.println("</html>");
}
}
}// End of class
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