- Create a simple calculator application using servlet.
index.html
<html><head><title>Calculator App</title></head><body>
<form action="CalculatorServlet" >
Enter First Number <input type="text" name="txtN1" ><br>
Enter Second Number <input type="text" name="txtN2" ><br>
Select an Operation
<input type="radio" name="opr" value="+">ADDTION
<input type="radio" name="opr" value="-">SUBSTRACTION
<input type="radio" name="opr" value="*">MULTIPLY
<input type="radio" name="opr" value="/">DIVIDE <br>
<input type="reset">
<input type="submit" value="Calculate" >
</form></body></html>
______________________________
CalculatorServlet.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class CalculatorServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Servlet CalculatorServlet</title></head><body>");
double n1 = Double.parseDouble(request.getParameter("txtN1"));
double n2 = Double.parseDouble(request.getParameter("txtN2"));
double result =0;
String opr=request.getParameter("opr");
if(opr.equals("+")) result=n1+n2; if(opr.equals("-")) result=n1-n2;
if(opr.equals("*")) result=n1*n2; if(opr.equals("/")) result=n1/n2;
out.println("<h1> Result = "+result); out.println("</body></html>");} }
______________________________
2) Create a servlet for a login page. If the username and password are correct then it says message
“Hello <username>” else a message “login failed”
index.html
<html><head><title>Login Form</title></head>
<form action="LoginServlet" >
Enter User ID<input type="text" name="txtId"><br>
Enter Password<input type="password" name="txtPass"><br>
<input type="reset"><input type="submit" value=" Click to Login " ></form></html>
LoginServlet.java
package mypack;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Servlet LoginServlet</title></head>");
String uname = request.getParameter("txtId");
String upass = request.getParameter("txtPass");
if(uname.equals("admin") && upass.equals("12345")){
out.println("<body bgcolor=blue >");
out.println("<h1> Welcome !!! "+uname+"</h1>");
}
else{
out.println("<body bgcolor=red >");out.println("<h1> Login Fail !!! </h1>");
}
out.println("</body></html>");}}
_________________________________
3) Create a registration servlet in Java using JDBC. Accept the details such as Username, Password,
Email, and Country from the user using HTML Form and store the registration details in the database.
MySql queries
create database LoginDB;
use LoginDB;
create table user(username varchar(20) PRIMARY KEY, password varchar(20), email varchar(20),
country varchar(20));
insert into user values ('admin','admin','
[email protected]','India');
select * from user;
• Add jar file →<<Netbean Folder>>\ide\modules\ext\mysql-connector-java-5.1.23-bin.jar
index.html
<html><head><title>Registration Page</title></head>
<body>
<form action="RegisterServlet" >
<H1>Welcome to Registration page</H1>
Enter User Name <input type="text" name="txtUid"><br>
Enter Password <input type="password" name="txtPass"><br>
Enter Email <input type="text" name="txtEmail" ><br>
Enter Country <input type="text" name="txtCon" ><br>
<input type="reset" ><input type="submit" value="REGISTER" >
</form>
</body>
</html>
_______________________
RegisterServlet.java
package mypack;
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class RegisterServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String id = request.getParameter("txtUid");
String ps = request.getParameter("txtPass");
String em = request.getParameter("txtEmail");
String co = request.getParameter("txtCon");
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con =DriverManager.getConnection("jdbc:mysql://localhost:3306/logindb");
PreparedStatement pst = con.prepareStatement("insert into user values(?,?,?,?)");
pst.setString(1,id);
pst.setString(2,ps);
pst.setString(3,em);
pst.setString(4,co);
int row = pst.executeUpdate();
out.println("<h1>"+row+ " Inserted Succesfullyyyyy");
}catch(Exception e){out.println(e);}
}
}
__________________________________________
4) Using Request Dispatcher Interface create a Servlet which will validate the password entered by
the user, if the user has entered "Servlet" as password, then he will be forwarded to Welcome Servlet
else the user will stay on the index.html page and an error message will be displayed.
index.html
<html><head><title>Login Form</title></head>
<form action="LoginServlet" >
Enter User ID<input type="text" name="txtId"><br>
Enter Password<input type="password" name="txtPass"><br>
<input type="reset">
<input type="submit" value=" Click to Login " >
</form>
</html>
LoginServlet.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.RequestDispatcher;
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<title>Servlet LoginServlet</title></head>");
String uname = request.getParameter("txtId");
String upass = request.getParameter("txtPass");
if(uname.equals("admin") && upass.equals("servlet")){
RequestDispatcher rd = request.getRequestDispatcher("WelcomeServlet");
rd.forward(request, response);
}
else{
out.println("<body bgcolor=red >");
out.println("<h1> Login Fail !!! </h1>");
RequestDispatcher rd = request.getRequestDispatcher("index.html");
rd.include(request, response);
}
out.println("</body>");
out.println("</html>");
}
WelcomeServlet.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.RequestDispatcher;
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head>");
out.println("<title>Servlet LoginServlet</title></head>");
String uname = request.getParameter("txtId");
String upass = request.getParameter("txtPass");
if(uname.equals("admin") && upass.equals("servlet")){
RequestDispatcher rd = request.getRequestDispatcher("WelcomeServlet");
rd.forward(request, response);
}
else{
out.println("<body bgcolor=red >");
out.println("<h1> Login Fail !!! </h1>");
RequestDispatcher rd = request.getRequestDispatcher("index.html");
rd.include(request, response);
}
out.println("</body>");
out.println("</html>");
} }
_________________________________
5) Create a servlet that uses Cookies to store the number of times a user has visited servlet.
index.html
<html>
<head><title>Cookie Demo</title></head>
<body>
<form action="Page1" >
Enter Your Name <input type="text" name="txtName"><br>
<input type="submit" value="~~~ Click to Enter ~~~">
</form>
</body>
</html>
Page1.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Cookie;
public class Page1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Page1</title></head>");
out.println("<body bgcolor=pink >");
String uname = request.getParameter("txtName");
out.println("<h1>~~~ Welcome "+uname+"</h1>");
Cookie ck1 = new Cookie("username", uname);
Cookie ck2 = new Cookie("visit","1");
response.addCookie(ck1); response.addCookie(ck2);
out.println("<h1><a href=Page2 >Click to visit Page 2 </a></h1>");
out.println("</body>");
out.println("</html>");
}
}
Page2.java
package mypack;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;
public class Page2 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Page2</title></head>");
out.println("<body bgcolor=yellow >");
Cookie [] ck = request.getCookies();
for(int i=0;i<ck.length;i++){
if(ck[i].getName().equals("visit")){
int count = Integer.parseInt(ck[i].getValue())+1;
out.println("<h1>Visit No : "+count+"</h1>");
ck[i] = new Cookie("visit",count+"");
response.addCookie(ck[i]);
}
else {
out.println(ck[i].getName()+ " = "+ck[i].getValue()); }
out.println("<h1><a href=Page3 >Click to visit Page 3 </a></h1>");
out.println("<h1><a href=Page4 >Click to visit Page 4 </a></h1>");
out.println("<h1><a href=Page5 >Click to visit Page 5 </a></h1>");
out.println("</body>");
out.println("</html>");
} }
_________________________________
6) Create a servlet demonstrating the use of session creation and destruction. Also check whether the
user has visited this page first time or has visited earlier also using sessions.
index.html
<html>
<head><title>Session Demo</title></head>
<form action="Page1" method="get" >
Enter User ID <input type="text" name="txtName"><br>
<input type="reset" ><input type="submit" >
</form>
</html>
Page1.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class Page1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Servlet Page1</title></head>");
HttpSession hs = request.getSession(true);
if(hs.isNew()){
out.println("<body bgcolor=yellow>");
String name = request.getParameter("txtName");
hs.setAttribute("uname", name);
hs.setAttribute("visit", "1");
out.println("<h1>Welcome First Time</h1>");
}
else{
out.println("<h1>Welcome Again</h1>");
int visit = Integer.parseInt((String)hs.getAttribute("visit"))+1;
out.println("<h1>You Visited "+visit+"Times</h1>");
hs.setAttribute("visit", ""+visit);
}
out.println("<h1>Your Session ID "+hs.getId()+"</h1>");
out.println("<h1>You Logged in at "+new java.util.Date(hs.getCreationTime())+"</h1>");
out.println("<h1><a href=Page2>Click for Page 2 </a></h1>");
out.println("<h1><a href=Page3>Click for Page 3 </a></h1>");
out.println("<h1><a href=Page4>Click for Page 4 </a></h1>");
out.println("<h1><a href=LogoutServlet>Click to Terminate Session </a></h1>");
out.println("</body>");
out.println("</html>");
}
}
Page2.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class Page2 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Servlet Page2</title></head>");
HttpSession hs = request.getSession(false);
out.println("<h1>Welcome Again on Page No. 2</h1>");
int visit = Integer.parseInt((String)hs.getAttribute("visit"))+1;
out.println("<h1>You Visited "+visit+"Times</h1>");
hs.setAttribute("visit", ""+visit);
out.println("<h1>Your Session ID "+hs.getId()+"</h1>");
out.println("<h1>You Logged in at "+new java.util.Date(hs.getCreationTime())+"</h1>");
out.println("<h1><a href=Page1>Click for Page 1 </a></h1>");
out.println("<h1><a href=Page3>Click for Page 3 </a></h1>");
out.println("<h1><a href=Page4>Click for Page 4 </a></h1>");
out.println("<h1><a href=LogoutServlet>Click for Terminate Session </a></h1>");
out.println("</body>");
out.println("</html>");
}
}
Repeat the code from Page2.java in Page3.java and Page4.java with relevant changes.
LogoutServlet.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LogoutServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html><head><title>Servlet LogoutServlet</title></head>");
out.println("<body>");
javax.servlet.http.HttpSession hs = request.getSession();
if(hs != null) hs.invalidate();
out.println("<h1>You are Logged out now........</h1>");
out.println("</body>");
out.println("</html>");
}
}
______________________________________
7) Create a Servlet application to upload and download a file.
~~~~~~~~~~~~~~~~~~~ index.html ~~~~~~~~~~~~~~~~~~~~~~
<html>
<body>
<form action="FileUploadServlet" method="post" enctype="multipart/form-data">
Select File to Upload:<input type="file" name="file" id="file">
Destination <input type="text" value="/tmp" name="destination">
<br>
<input type="submit" value="Upload file" name="upload" id="upload">
</form>
</body>
</html>
~~~~~ FileUploadServlet.java ~~~~~~~
package fileservletapp;
import java.io.*;
import javax.servlet.*;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.http.*;
@MultipartConfig
public class FileUploadServlet extends HttpServlet {
public void doPost(HttpServletRequest req,HttpServletResponse res) throws ServletException,
IOException
{
res.setContentType("text/html");
PrintWriter out = res.getWriter();
String path=req.getParameter("destination");
Part filePart=req.getPart("file");
String filename=filePart.getSubmittedFileName().toString();
out.print("<br><br><hr> file name: "+filename);
OutputStream os=null;
InputStream is=null;
try {
os=new FileOutputStream(new File(path+File.separator+filename));
is=filePart.getInputStream();
int read=0;
while ((read = is.read()) != -1) {
os.write(read);
}
out.println("<br>file uploaded sucessfully...!!!");
}
catch(FileNotFoundException e){out.print(e);}
} }
<html>
<head>
<title>File Download Page</title>
</head>
<body>
<h1>File Download Application</h1>
Click <a href="DownloadServlet?filename=SampleChapter.pdf">Sample Chapter</a>
<br/><br/>
Click <a href="DownloadServlet?filename=TOC.pdf">Table Of Contents</a>
</body>
</html>
~~~~~ DownloadServlet.java ~~~~~~
package filedownloadapp;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DownloadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("APPLICATION/OCTET-STREAM");
String filename = request.getParameter("filename");
ServletContext context = getServletContext();
InputStream is = context.getResourceAsStream("/" + filename);
//ServletOutputStream out = response.getOutputStream(); // any of the two works
PrintWriter out=response.getWriter();
response.setHeader("Content-Disposition","attachment; filename=\"" + filename + "\""); //
if comment this statement then it wl ask you about the editor with which you want to open the file
int i;
while ((i=is.read()) != -1) {
out.write(i);
}
is.close();
out.close();
}
}
___________________________________
8) Develop Simple Servlet Question Answer Application using Database.
create database qadb;
use qabd;
create table quiz (qno varchar(5) PRIMARY KEY,question varchar(100), op1 varchar(50), op2
varchar(50), op3 varchar(50), op4 varchar(50), ans varchar(50))
insert into quiz values('001','What is the capital of India??','New
Delhi','Kolkata','Chennai','Mumbai','New Delhi');
insert into quiz values('002','Who was the First President of India??','Dr. Rajendra Prasad','Dr. S.
Radhakrishnan','Ram Nath Kovind','V. V. Giri','Dr. Rajendra Prasad');
insert into quiz values('003','What is ORM','Object Ratio Mean','Object Rotation Measure','Object
Relation Mapping','Oracle Request Management','Object Relation Mapping');
insert into quiz values('004','Unit of Energy is ___','Dozon','Kilo Meter ','Joul','Hertz','Joul')
insert into quiz values('005',' --- is the smallest memory unit.','bit','byte','Kilo Byte','Giga Byte','bit')
index.html
<html><head><title>Quiz Application</title></head>
<body>
<h1>Welcome to Quiz Servlet </h1>
<h1><a href="QuizServlet" >CLICK TO START QUIZ</a></h1>
</body>
</html>
QuizServlet.java
package mypack;
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class QuizServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<form action=ShowResult >");
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con =
DriverManager.getConnection("jdbc:mysql://localhost:3306/qadb","root","root");
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery("select * from quiz");
out.println("<table border=1 >");
int qno=0;
while(res.next()){
qno++;
out.println("<tr><td>"+res.getString(1)+"</td>");
out.println("<td>"+res.getString(2)+"</td></tr>");
out.println("<tr><td><input type=radio name="+qno+"
value="+res.getString(3)+"></td><td>"+res.getString(3)+"</td></tr>");
out.println("<tr><td><input type=radio name="+qno+"
value="+res.getString(4)+"></td><td>"+res.getString(4)+"</td></tr>");
out.println("<tr><td><input type=radio name="+qno+"
value="+res.getString(5)+"></td><td>"+res.getString(5)+"</td></tr>");
out.println("<tr><td><input type=radio name="+qno+"
value="+res.getString(6)+"></td><td>"+res.getString(6)+"</td></tr>");
}
}catch(Exception e){out.println(e);}
out.println("</table>");
out.println("<input type=reset >");
out.println("<input type=submit value=SUBMIT >");
out.println("</form>"); } }
---------------------------------------------- ShowResult.java--------------------------------
package mypack;
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ShowResult extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/qadb","root","root");
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery("select ans from quiz");
int count =0, qno=0;
while(res.next()){
if(res.getString(1).equals(request.getParameter(""+(++qno))))
{ count++;
out.println("<h1>Correct </h1>");
}
else {
out.println("<h1>Incorrect </h1>");
}
}
out.println("<h1>Your Score is "+count+" </h1>");
}catch(Exception e){out.println(e);}}}
__________________________
9) Develop a simple JSP application to display values obtained from the use of intrinsic objects of
various types.
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<html><head><title>JSP Page</title></head>
<body>
<h1>Use of Intrinsic Objects in JSP</h1>
<h1>Request Object </h1>
Query String <%=request.getQueryString() %><br>
Context Path <%=request.getContextPath() %><br>
Remote Host <%=request.getRemoteHost() %><br>
<h1>Response Object </h1>
Character Encoding Type <%=response.getCharacterEncoding() %><br>
Content Type <%=response.getContentType() %><br>
Locale <%=response.getLocale() %><br>
<h1>Session Object </h1>
ID <%=session.getId() %><br>
Creation Time <%=new java.util.Date(session.getCreationTime()) %><br>
Last Access Time<%=new java.util.Date(session.getLastAccessedTime()) %><br>
</body>
</html>
___________________________________
10) Develop a simple JSP application to pass values from one page to another with validations.
(Name-txt, age-txt, hobbies-checkbox, email-txt, gender-radio button).
index.html
<html><head><title>User Information Paage</title>
</head>
<body>
<form action="Validate.jsp">
Enter Your Name<input type="text" name="name" ><br>
Enter Your Age<input type="text" name="age" ><br>
Select Hobbies
<input type="checkbox" name="hob" value="Singing">Singing
<input type="checkbox" name="hob" value="Reading">Reading Books
<input type="checkbox" name="hob" value="Football">Playing Football<br>
Enter E-mail<input type="text" name="email" ><br>
Select Gender
<input type="radio" name="gender" value="male">Male
<input type="radio" name="gender" value="female">Female
<input type="radio" name="gender" value="other">Other<br>
<input type="hidden" name="error" value="">
<input type="submit" value="Submit Form">
</form>
</body>
</html>
------------------------------------------ Validate.jsp----------------------------------------------------
<%@page contentType="text/html" pageEncoding="UTF-8" import="mypack.*" %>
<html><head><title>JSP Page</title></head>
<body>
<h1>Validation Page</h1>
<jsp:useBean id="obj" scope="request"
class="mypack.CheckerBean" >
<jsp:setProperty name="obj" property="*"/>
</jsp:useBean>
<%if (obj.validate())
{ %>
<jsp:forward page="successful.jsp"/>
<% }
else {%>
<jsp:include page="index.html"/>
<%}%>
<%=obj.getError() %>
</body></html>
----------------------------------------CheckerBean.java-------------------------------------------
package mypack;
public class CheckerBean {
private String name, age, hob, email, gender, error;
public CheckerBean(){error="";}
public void setName(String n){name=n;}
public void setAge(String a){age=a;}
public void setHob(String h){hob=h;}
public void setEmail(String e){email=e;}
public void setGender(String g){gender=g;}
public void setError(String e){error=e;}
public String getName(){return name;}
public String getAge(){return age;}
public String getHob(){return hob;}
public String getEmail(){return email;}
public String getGender(){return gender;}
public String getError(){return error;}
public boolean validate(){
boolean res=true;
if(name.trim().equals("")) {error+="<br>Enter First Name";res=false;}
if(age.length() > 2 )
{error+="<br>Age Invalid";res=false;}
return res;
}
}
____________________________________
11) Create a registration and login JSP application to register and authenticate the user based on
username and password using JDBC.
--------------------------------------Register.html--------------------------------------
<html><head><title>New User Registration Page</title></head>
<body>
<form action="Register.jsp" >
<h1> New User Registration Page</h1>
Enter User Name <input type="text" name="txtName" ><br>
Enter Password <input type="password" name="txtPass1" ><br>
Re-Enter Password<input type="password" name="txtPass2" ><br>
Enter Email<input type="text" name="txtEmail" ><br>
Enter Country Name <input type="text" name="txtCon" ><br>
<input type="reset" ><input type="submit" value="REGISTER" >
</form>
</body>
</html>
----------------------------------------Register.jsp-------------------------------------------
<%@page contentType="text/html" import="java.sql.*"%>
<html><body>
<h1>Registration JSP Page</h1>
<%
String uname=request.getParameter("txtName");
String pass1 = request.getParameter("txtPass1");
String pass2 = request.getParameter("txtPass2");
String email = request.getParameter("txtEmail");
String ctry = request.getParameter("txtCon");
if(pass1.equals(pass2)){
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/logindb");
PreparedStatement stmt = con.prepareStatement("insert into user values (?,?,?,?)");
stmt.setString(1, uname); stmt.setString(2, pass1);
stmt.setString(3, email); stmt.setString(4, ctry);
int row = stmt.executeUpdate();
if(row==1) { out.println("Registration Successful"); }
else {
out.println("Registration FFFFFAAAIIILLLL !!!!");
%><jsp:include page="Register.html" ></jsp:include>
<%
}
}catch(Exception e){out.println(e);}
}
else
{
out.println("<h1>Password Mismatch</h1>");
%>
<jsp:include page="Register.html" ></jsp:include>
<% }
%>
</body>
</html>
------------------- Login.html -----------------------------------
<html>
<body>
<h1>Login Page</h1>
<form action="Login.jsp" >
Enter User Name <input type="text" name="txtName" ><br>
Enter Password <input type="password" name="txtPass" ><br>
<input type="reset" ><input type="submit" value="~~~LOGIN~~" >
</form>
</body>
</html>
------------------- Login.jsp----------------------------------
<%@page contentType="text/html" import="java.sql.*"%>
<html><body>
<h1>Registration JSP Page</h1>
<%
String uname=request.getParameter("txtName");
String pass = request.getParameter("txtPass");
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/logindb");
PreparedStatement stmt = con.prepareStatement("select password from user where username=?");
stmt.setString(1, uname);
ResultSet rs = stmt.executeQuery();
if(rs.next()){
if(pass.equals(rs.getString(1)))
{
out.println("<h1>~~~ LOGIN SUCCESSFULLL ~~~ </h1>");
}
}
else{
out.println("<h1>User Name not exist !!!!!</h1>");
%>
<jsp:include page="Register.html" ></jsp:include>
<%
}
}catch(Exception e){out.println(e);}
%>
</body></html>
____________________________________________________
12) Create a Currency Converter application using EJB.
------------------- index.html ------------------------------------
<html><head><title>Currency Converter</title></head>
<body>
<form action="CCServlet" >
Enter Amount <input type="text" name="amt"><br>
Select Conversion Type
<input type="radio" name="type" value="r2d" checked>Rupees to Dollar
<input type="radio" name="type" value="d2r" >Dollor to Rupees<br>
<input type="reset" ><input type="submit" value="CONVERT" >
</form>
</body>
</html>
-------------------------------- CCServlet.java --------------------------
package mypack;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.ejb.EJB;
import mybeans.CCBean;
public class CCServlet extends HttpServlet {
@EJB CCBean obj;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
double amt = Double.parseDouble(request.getParameter("amt"));
if(request.getParameter("type").equals("r2d"))
{
out.println("<h1>"+amt+ " Rupees = "+obj.r2Dollor(amt)+" Dollors</h1>");
}
if(request.getParameter("type").equals("d2r"))
{
out.println("<h1>"+amt+ " Dollors = "+obj.d2Rupees(amt)+" Rupees</h1>");
}
}}
------------------------- CCBean ----------------------------
Create a stateless session bean
-----------------------------------------------------------------
package mybeans;
import javax.ejb.Stateless;
@Stateless
public class CCBean {
public CCBean(){}
public double r2Dollor(double r){ return r/65.65; }
public double d2Rupees(double d){ return d*65.65; }
}