Session tracking using Http Cookies

index.html

========

<!DOCTYPE html>

<html>

<head>

<title>Insert title here</title>

div {

width: 500px;

margin: auto;

margin-top: 100px;

}

</style>

</head>

<body>

<div>

Name: <br> <input type="text" name="name"> <br>

Choose any one: <br> <select name="dish">

<option value="sweet">Sweet</option>

<option value="spicy">Spicy</option>

</select> <br> <input type="submit" value="submit">

</form>

</div>

</body>

</html>

FirstServlet.java

-------------------

package com.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.Cookie;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/firsturl")

public class FirstServlet extends HttpServlet {

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

// get PrintWriter

PrintWriter pw = res.getWriter();

// set content type

res.setContentType("text/html");

// get the values

String name = req.getParameter("name");

String dish = req.getParameter("dish");

// create the cookie

Cookie ck1 = new Cookie("uname", name);

ck1.setMaxAge(60);//1 min

res.addCookie(ck1);

if (dish.equalsIgnoreCase("sweet")) {

pw.println("<h1>Choose One</h1>");

pw.println("<form action='secondurl' method='post'>");

pw.println("<select name='dish'>");

pw.println("<option value='gulab jamun'>gulab jamun</option>");

pw.println("<option value='jalebi'>jalebi</option>");

pw.println("</select>");

pw.println("<br>");

pw.println("<input type='submit' value='submit'>");

pw.println("</form>");

} else {

pw.println("<h1>Choose One</h1>");

pw.println("<form action='secondurl' method='post'>");

pw.println("<select name='dish'>");

pw.println("<option value='samosa'>samosa</option>");

pw.println("<option value='paneer'>paneer</option>");

pw.println("</select>");

pw.println("<br>");

pw.println("<input type='submit' value='submit'>");

pw.println("</form>");

}

//close the stream

pw.close();

}

SecondServlet.java

----------------------

package com.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.Cookie;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/secondurl")

public class SecondServlet extends HttpServlet {

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

// get PrintWriter

PrintWriter pw = res.getWriter();

// set content type

res.setContentType("text/html");

// get the values

// read cookies

Cookie cookies[] = req.getCookies();

String name = null;

if (cookies != null) {

name = cookies[0].getValue();

} else {

pw.println("Cookie deleted");

}

String dish = req.getParameter("dish");

pw.println("<h2>Thanks you " + name + " your " + dish + " will be placed soon</h2>");

// close the Stream

pw.close();

}

Servlet Project Book Shop Application in eclipse

Servlet Project Book Shop Application in eclipse For explanation watch video::: Note :: In this Project you must configure web server (for example tomcat) with eclipse ide Download Bootstrap from :: https://getbootstrap.com/docs/4.3/getting-started/download/ Download mysql jar file from :: https://mvnrepository.com/artifact/mysql/mysql-connector-java/8.0.22 adding MySQL Connector/J jar file in eclipse ide for jdbc video :: video link : https://youtu.be/4Fyd-k3eG_I Directory Structure:: web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0"> <welcome-file-list> <welcome-file>home.html</welcome-file> </welcome-file-list> <display-

JDBC basic example For Select Query

JDBC basic example For Select Query For explanation watch video: For Creating Table:: SQL> create table emp60(srno int,fname varchar2(10)); Table created. SQL> desc emp60; Name Null? Type ----------------------------------------- -------- ---------------------------- SRNO NUMBER(38) FNAME VARCHAR2(10) SQL> insert into emp60 values(1,'allu'); 1 row created. SQL> insert into emp60 values(2,'vijay'); 1 row created. SQL> insert into emp60 values(3,'rajni'); 1 row created. SQL> select * from emp60; SRNO FNAME ---------- ---------- 1 allu 2 vijay 3 rajni TO check Service Id: SQL> commit; Commit complete. SQL> select * from global_name; GLOBAL_NAME -------------------------------------------------------------------------------- ORCL JDBC Program:: =========== import java.sql.*;

JDBC Program to access table data from mysql database

import java.sql.*; class MysqlCon { public static void main(String[] args) { try{ Connection con = DriverManager.getConnection("jdbc:mysql:///new","root","root"); Statement st = con.createStatement(); String query = "select * from login"; ResultSet rs = st.executeQuery(query); while(rs.next()){ System.out.println(rs.getString(1)+" "+rs.getString(2)); } con.close(); }catch(SQLException e){ System.out.println("Error"); }catch(Exception e){ } } }

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