📄 sessionservlet.java
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import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class SessionServlet extends HttpServlet{
Integer counter1;
int counter2;
public void init(ServletConfig config) throws ServletException{
super.init(config);
counter2=0;
//set self environment variable
}
public void doGet(HttpServletRequest req,HttpServletResponse resp)
throws IOException{
HttpSession session=req.getSession(true);
//set the Response Content Type
resp.setContentType("text/html");
//obtain a PrintWriter stream to write to.
PrintWriter out=resp.getWriter();
//print out our Text
out.println("<html><head><title>Session Servlet</title></head><body>");
counter1=(Integer)session.getAttribute("session_counter");
if(counter1==null){
counter1=new Integer(1);
}else{
counter1=new Integer(counter1.intValue()+1);
}
counter2++;
out.println("You have call the page total <b>"+counter2+"</b> times,");
out.println("<br>includes from all other browser page.");
/*session.setAttribute("session_counter",counter1);
out.println("You have call this page <b>"+counter1+"</b> times.");
//out.println("<br>counter2="+counter2);
out.println("<br>Click <a href="+resp.encodeURL("SessionServlet")+">href</a>");
out.println("to access the page again");
out.println("<br>session.isNew(): "+session.isNew());
//Following,demonstrate some of the more common methods in the HttpSession object surrounding sessions:
out.println("<h4>RequestData:</h4>");
out.println("Session ID in Request: "+req.getRequestedSessionId());
out.println("<br>Session ID in Request from Cookie: "+req.getRequestedSessionId());
out.println("<br>Session ID in Request from URL: "+req.getRequestedSessionId());
out.println("<br>Valid Session ID: "+req.isRequestedSessionIdValid());
out.println("<h4>Session Data:</h4>");
out.println("Session ID: "+session.getId());
out.println("<br>Create Time: "+session.getCreationTime());
out.println("<br>LastAccessedTime :"+session.getLastAccessedTime());
*/
out.println("</body></html>");
}
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