package demo.canquick.eniac.servlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class HttpSessionServletDemo extends HttpServlet {

public void doGet(HttpServletRequest hsr,HttpServletResponse hsrs){

HttpSession hs = hsr.getSession();

System.out.println(hs.getId());

hs.setAttribute("username", "eniac");

System.out.println(hs.getAttribute("username"));

}

public void doPost(HttpServletRequest hsr,HttpServletResponse hsrs){

this.doGet(hsr, hsrs);

}

}

 <servlet>

  <servlet-name>servletSession</servlet-name>

  <servlet-class>demo.canquick.eniac.servlet.HttpSessionServletDemo</servlet-class>

 </servlet>

 <servlet-mapping>

  <servlet-name>servletSession</servlet-name>

  <url-pattern>/servletSession</url-pattern>

 </servlet-mapping>