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-name>BookWebApp</display-name>

</web-app>

home.html

<!DOCTYPE html>

<html>

<head>

<title>Insert title here</title>

</head>

<h2 class="bg-danger text-white text-center">Book Registration</h2>

<tr>

</tr>

<tr>

<td>Book Edition</td>

</tr>

<tr>

<td>Book Price</td>

</tr>

<tr>

</tr>

</table>

</form>

</body>

</html>

package com.idiot.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/register")

public class RegisterServlet extends HttpServlet {

private static final String query = "INSERT INTO BOOKDATA(BOOKNAME,BOOKEDITION,BOOKPRICE) VALUES(?,?,?)";

@Override

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

//get PrintWriter

PrintWriter pw = res.getWriter();

//set content type

res.setContentType("text/html");

//GET THE book info

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

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

float bookPrice = Float.parseFloat(req.getParameter("bookPrice"));

//LOAD jdbc driver

try {

Class.forName("com.mysql.cj.jdbc.Driver");

}catch(ClassNotFoundException cnf) {

cnf.printStackTrace();

}

//generate the connection

try(Connection con = DriverManager.getConnection("jdbc:mysql:///book","root","root");

PreparedStatement ps = con.prepareStatement(query);){

ps.setString(1, bookName);

ps.setString(2, bookEdition);

ps.setFloat(3, bookPrice);

int count = ps.executeUpdate();

if(count==1) {

pw.println("<h2>Record Is Registered Sucessfully</h2>");

}else {

pw.println("<h2>Record not Registered Sucessfully");

}

}catch(SQLException se) {

se.printStackTrace();

pw.println("<h1>"+se.getMessage()+"</h2>");

}catch(Exception e) {

e.printStackTrace();

pw.println("<h1>"+e.getMessage()+"</h2>");

}

pw.println("<a href='home.html'>Home</a>");

pw.println("<br>");

pw.println("<a href='bookList'>Book List</a>");

}

@Override

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

doGet(req,res);

}

Book List Servlet .java file code

package com.idiot.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/bookList")

public class BookListServlet extends HttpServlet {

private static final String query = "SELECT ID,BOOKNAME,BOOKEDITION,BOOKPRICE FROM BOOKDATA";

@Override

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

//get PrintWriter

PrintWriter pw = res.getWriter();

//set content type

res.setContentType("text/html");

//LOAD jdbc driver

try {

Class.forName("com.mysql.cj.jdbc.Driver");

}catch(ClassNotFoundException cnf) {

cnf.printStackTrace();

}

//generate the connection

try(Connection con = DriverManager.getConnection("jdbc:mysql:///book","root","root");

PreparedStatement ps = con.prepareStatement(query);){

ResultSet rs = ps.executeQuery();

pw.println("<table border='1' align='center'>");

pw.println("<tr>");

pw.println("<th>Book Id</th>");

pw.println("<th>Book Name</th>");

pw.println("<th>Book Edition</th>");

pw.println("<th>Book Price</th>");

pw.println("<th>Edit</th>");

pw.println("<th>Delete</th>");

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

while(rs.next()) {

pw.println("<tr>");

pw.println("<td>"+rs.getInt(1)+"</td>");

pw.println("<td>"+rs.getString(2)+"</td>");

pw.println("<td>"+rs.getString(3)+"</td>");

pw.println("<td>"+rs.getFloat(4)+"</td>");

pw.println("<td><a href='editScreen?id="+rs.getInt(1)+"'>Edit</a></td>");

pw.println("<td><a href='deleteurl?id="+rs.getInt(1)+"'>Delete</a></td>");

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

}

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

}catch(SQLException se) {

se.printStackTrace();

pw.println("<h1>"+se.getMessage()+"</h2>");

}catch(Exception e) {

e.printStackTrace();

pw.println("<h1>"+e.getMessage()+"</h2>");

}

pw.println("<a href='home.html'>Home</a>");

}

@Override

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

doGet(req,res);

}

Edit Screen Servlet .java file code

package com.idiot.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/editScreen")

public class EditScreenServlet extends HttpServlet {

private static final String query = "SELECT BOOKNAME,BOOKEDITION,BOOKPRICE FROM BOOKDATA where id=?";

@Override

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

//get PrintWriter

PrintWriter pw = res.getWriter();

//set content type

res.setContentType("text/html");

//get the id of record

int id = Integer.parseInt(req.getParameter("id"));

//LOAD jdbc driver

try {

Class.forName("com.mysql.cj.jdbc.Driver");

}catch(ClassNotFoundException cnf) {

cnf.printStackTrace();

}

//generate the connection

try(Connection con = DriverManager.getConnection("jdbc:mysql:///book","root","root");

PreparedStatement ps = con.prepareStatement(query);){

ps.setInt(1, id);

ResultSet rs = ps.executeQuery();

rs.next();

pw.println("<form action='editurl?id="+id+"' method='post'>");

pw.println("<table align='center'>");

pw.println("<tr>");

pw.println("<td>Book Name</td>");

pw.println("<td><input type='text' name='bookName' value='"+rs.getString(1)+"'></td>");

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

pw.println("<tr>");

pw.println("<td>Book Edition</td>");

pw.println("<td><input type='text' name='bookEdition' value='"+rs.getString(2)+"'></td>");

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

pw.println("<tr>");

pw.println("<td>Book Price</td>");

pw.println("<td><input type='text' name='bookPrice' value='"+rs.getFloat(3)+"'></td>");

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

pw.println("<tr>");

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

pw.println("<td><input type='reset' value='cancel'></td>");

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

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

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

}catch(SQLException se) {

se.printStackTrace();

pw.println("<h1>"+se.getMessage()+"</h2>");

}catch(Exception e) {

e.printStackTrace();

pw.println("<h1>"+e.getMessage()+"</h2>");

}

pw.println("<a href='home.html'>Home</a>");

}

@Override

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

doGet(req,res);

}

EditServlet .java file code

package com.idiot.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/editurl")

public class EditServlet extends HttpServlet {

private static final String query = "update BOOKDATA set BOOKNAME=?,BOOKEDITION=?,BOOKPRICE=? where id=?";

@Override

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

//get PrintWriter

PrintWriter pw = res.getWriter();

//set content type

res.setContentType("text/html");

//get the id of record

int id = Integer.parseInt(req.getParameter("id"));

//get the edit data we want to edit

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

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

float bookPrice = Float.parseFloat(req.getParameter("bookPrice"));

//LOAD jdbc driver

try {

Class.forName("com.mysql.cj.jdbc.Driver");

}catch(ClassNotFoundException cnf) {

cnf.printStackTrace();

}

//generate the connection

try(Connection con = DriverManager.getConnection("jdbc:mysql:///book","root","root");

PreparedStatement ps = con.prepareStatement(query);){

ps.setString(1, bookName);

ps.setString(2, bookEdition);

ps.setFloat(3, bookPrice);

ps.setInt(4, id);

int count = ps.executeUpdate();

if(count==1) {

pw.println("<h2>Record is Edited Successfully</h2>");

}else {

pw.println("<h2>Record is not Edited Successfully</h2>");

}

}catch(SQLException se) {

se.printStackTrace();

pw.println("<h1>"+se.getMessage()+"</h2>");

}catch(Exception e) {

e.printStackTrace();

pw.println("<h1>"+e.getMessage()+"</h2>");

}

pw.println("<a href='home.html'>Home</a>");

pw.println("<br>");

pw.println("<a href='bookList'>Book List</a>");

}

@Override

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

doGet(req,res);

}

DeleteServlet .java file code

package com.idiot.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/deleteurl")

public class DeleteServlet extends HttpServlet {

private static final String query = "delete from BOOKDATA where id=?";

@Override

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

//get PrintWriter

PrintWriter pw = res.getWriter();

//set content type

res.setContentType("text/html");

//get the id of record

int id = Integer.parseInt(req.getParameter("id"));

//LOAD jdbc driver

try {

Class.forName("com.mysql.cj.jdbc.Driver");

}catch(ClassNotFoundException cnf) {

cnf.printStackTrace();

}

//generate the connection

try(Connection con = DriverManager.getConnection("jdbc:mysql:///book","root","root");

PreparedStatement ps = con.prepareStatement(query);){

ps.setInt(1, id);

int count = ps.executeUpdate();

if(count==1) {

pw.println("<h2>Record is Deleted Successfully</h2>");

}else {

pw.println("<h2>Record is not deleted Successfully</h2>");

}

}catch(SQLException se) {

se.printStackTrace();

pw.println("<h1>"+se.getMessage()+"</h2>");

}catch(Exception e) {

e.printStackTrace();

pw.println("<h1>"+e.getMessage()+"</h2>");

}

pw.println("<a href='home.html'>Home</a>");

pw.println("<br>");

pw.println("<a href='bookList'>Book List</a>");

}

@Override

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

doGet(req,res);

}

how add labeltext to the container in flutter

how add labeltext to the container in flutter for an explanation watch the video code import 'package:flutter/material.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({super.key}); // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: const Home(), debugShowCheckedModeBanner: false, ); } } class Home extends StatefulWidget { const Home({super.key}); @override State<Home> createState() => _HomeState(); } class _HomeState extends State<Home> { @override Widget build(BuildContext context) { return Scaffold( body: Center( child: Container( height: 100, width: 400, child: InputDecorator( decoration: InputDecoration( labelText: ...

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