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Difference between request.getSession() and request.getSession(true)
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gupta-ashu01 2020-07-15 21:40:56 +05:30 committed by GitHub
parent 6182cdf09f
commit 2c62d0214c
5 changed files with 114 additions and 0 deletions

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Manifest-Version: 1.0
Class-Path:

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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>httpsessionexample</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>firstservlet</servlet-name>
<servlet-class>httpsessionexample.FirstServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>firstservlet</servlet-name>
<url-pattern>/firstservlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>secondservlet</servlet-name>
<servlet-class>httpsessionexample.SecondServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>secondservlet</servlet-name>
<url-pattern>/secondservlet</url-pattern>
</servlet-mapping>
</web-app>

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<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="firstservlet">
Name: <input type="text" name="userName"/><br/> <br/>
<input type="submit" value="submit"/>
</form>
</body>
</html>

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package httpsessionexample;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class FirstServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) {
try {
HttpSession session = request.getSession();
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String name = request.getParameter("userName");
out.print("Hi " + name);
session.setAttribute("uname", name);
out.print("</br> ");
out.print("Session Id : " + session.getId());
out.print("</br> ");
out.print("<a href='secondservlet'>Second Servlet</a>");
out.close();
} catch (Exception e) {
System.out.println(e);
}
}
}

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package httpsessionexample;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class SecondServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) {
try {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession(true);
String name = (String) session.getAttribute("uname");
out.print("Hi " + name);
out.print("</br> ");
out.print("Session Id : " + session.getId());
out.print("</br> ");
out.close();
} catch (Exception e) {
System.out.println(e);
}
}
}