JSP TUTORIAL for students M.Sc computer Science

• JSP technology is used to create web application
• A JSP page consists of HTML tags and JSP tags

Creating a simple JSP Page
To create the first JSP page, write some HTML code as given below, and save it by .jsp extension. We
have saved this file as index.jsp. Put it in a folder and paste the folder in the web-apps directory in
apache tomcat to run the JSP page.
1.<html>
2.<body>
3.<% out.print(2*5); %>
4.</body>
5.</html>
index.jsp

How to run a simple JSP Page?
Follow the following steps to execute this JSP page:
•Start the server
•Put the JSP file in a folder and deploy on the server
•Visit the browser by the URL http://localhost:portno/contextRoot/jspfile,
for example, http://localhost:8888/myapplication/index.jsp

The Directory structure of JSP

JSP scriptlet tag
A scriptlet tag is used to execute java source code in JSP. Syntax is as follows:
<% java source code %>
Example of JSP scriptlet tag
In this example, we are displaying a welcome
message.
<html>
<body>
<% out.print("welcome to jsp"); %>
</body>
</html>

Example of JSP scriptlet tag that prints the user name
The index.html file gets the username from the user and the welcome.jsp file prints the username
with the welcome message.
File: index.html
<html>
<body>
<form action="welcome.jsp">
<input type="text" name="uname">
<input type="submit" value="go"><br/>
</form>
</body>
</html>
File: welcome.jsp
<html>
<body>
<%
String name=request.getParameter("uname");
out.print("welcome "+name);
%>
</form>
</body>
</html>

JSP expression tag
The code placed within JSP expression tag is written to the output stream of the response. So
you need not write out.print() to write data. It is mainly used to print the values of variable or
method.
1. Syntax of JSP expression tag
<%= statement %>
Example of JSP expression tag
<html>
<body>
<%= "welcome to jsp" %>
</body>
</html>

1. Example of JSP expression tag that prints current time
index.jsp
<html>
<body>
Current Time: <%= java.util.Calendar.getInstance().getTime() %>
</body>
</html>
2. Example of JSP expression tag that prints the user name
File: index.jsp
<html>
<body>
<form action="welcome.jsp">
<input type="text" name="uname"><br/>
<input type="submit" value="go">
</form>
</body>
</html>
File: welcome.jsp
<html>
<body>
<%= "Welcome "+request.getParameter("uname") %>
</body>
</html>

JSP Declaration Tag
To declare variable or method in JSP declaration tag is used.
Syntax
<%! Scripting-language-declaration %>
Example
<!DOCTYPE html>
<html>
<head>
<title>Declaration tag</title>
</head>
<body>
<%! int a=100; %>
<%= "Value of the variable is:"+a %>
</body>
</html>

1. JSP request implicit object with Example
• The JSP request is an implicit object of type HttpServletRequest.
• It is used to get request information such as parameter, header information, remote address, server
name, server port, content type, character coding etc.
• Request implicit object is used to get the data on a JSP page which has been entered by user on the
previous JSP or HTML page.

index.html
<!DOCTYPE html>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<form action="home.jsp">
<input type="text" placeholder="first
name" name="fname"> <br><br>
<input type="text" placeholder="last
name" name="lname"> <br> <br>
<input type="submit" value="submit"><br>
</form>
</body>
</html>
home.jsp
<%@ page
language="java" contentType="text/html;
charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-
Type" content="text/html; charset=ISO-8859-1">
<title>JSP Request </title>
</head>
<body>
<%
String fname=request.getParameter("fname");
String lname=request.getParameter("lname");
out.print("First Name :"+fname);
out.println("<br>");
out.print("Last Name :"+lname);
%>
</body>
</html>

2. JSP response implicit object with example
• Response implicit object is mainly used for send response to the client browser after
processing the request.
index.html
<!DOCTYPE html>
<html>
<head>
<title>JSP Session</title>
</head>
<body>
<form action="process.jsp">
<input type="text" placeholder="User id" name="userid"> <br><br>
<input type="text" placeholder="Password" name="password"> <br> <br>
</form>
</body>
</html>

process.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<%
String userid=request.getParameter("userid");
String password=request.getParameter("password");
if(userid.equals("admin") && password.equals("admin123"))
{
response.sendRedirect("success.jsp");
}
else {
response.sendRedirect("error.jsp");
}
%>
</body>
</html>
sucess.jsp
<!DOCTYPE html>
<html>
<head>
<title>you are Sucessfully logged In</title>
</head>
<body>
<p>Sucess</p>
</body>
</html>
error.jsp
<!DOCTYPE html>
<html>
<head>
<title>Error</title>
</head>
<body>
<p>Error</p>
</body>
</html>

3. JSP Config implicit object
• In JSP, config is an implicit object of type ServletConfig. Config Implicit object is used for getting
configuration information for a particular JSP page like get the driver name, servlet name etc.
• The config object is created by the web container for each jsp page. Generally, it is used to get
initialization parameter from the web.xml file.
web.xml
<web-app>
<servlet>
<servlet-name>StudentsTutorial</servlet-name>
<jsp-file>/index.jsp</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>StudentsTutorial</servlet-name>
<url-pattern>/index</url-pattern>
</servlet-mapping>
</web-app>
index.jsp
<!DOCTYPE html>
<html>
<head>
<title> JSP Config</title>
</head>
<body>
<%
String name=config.getServletName();
out.print("Name of Servlet is: "+name);
%>
</body>
</html>

4. JSP Application implicit object
• In JSP, Application implicit object used for getting initialization parameters and for sharing the
attributes and their values across all JSP page.That means any attribute set by application implicit
object would be available to all the JSP pages.
• Application implicit object is an instance of javax.servlet.ServletContext.
index.jsp
<%@ page import="java.io.*,java.util.*" %>
<!DOCTYPE html>
<html>
<head>
<title> Application Implicit Object</title>
</head>
<body>
<h1>JSP Tutorial</h1> <%
Integer counter= (Integer)application.getAttribute("visit");
if( counter ==null || counter == 0 ){
counter = 1;
}
else{
counter = counter+ 1;
}
application.setAttribute("visit", counter);
%>
<h3>Total number of view to this Page is: <%= counter%></h3>
<p>Copyright © 2017 By <a href="//www.studentstutorial.com" target="_blank" style="text-
decoration:none"><b style="color:green">studentstutorial.com</b></a>. All Rights Reserved.</p>
</body>
</html>

5. JSP session implicit object
• In JSP session is a way to store information to be used across multiple pages till the user
session is active.
• Session variable hold information about one single user and available to all pages.
index.html
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form action="session-one.jsp">
<input type="text" placeholder="first name" name="fname"> <br><br>
<input type="text" placeholder="last name" name="lname"> <br> <br>
</form>
</body>
</html>

session-one.jsp
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<%
session.setAttribute("fname",fname);
session.setAttribute("lname",lname);
out.print("Hello"+fname);
out.print("<br>");
out.print("Session set sucessfully. Please click on the below link to check.");
%>
<br> <a href="session-two.jsp">Check</a>
</body>
</html>

session-two.jsp
<!DOCTYPE html>
<html>
<head>
<title>JSP Session </title>
</head>
<body>
<%
String fname=(String)session.getAttribute("fname");
String lname=(String)session.getAttribute("lname");
out.print("First Name :"+fname);
out.print("<br>");
out.print("Last Name :"+lname);
%>
</body>
</html>

6. JSP pageContext Implicit Object with Example
• In JSP, pageContext is an instance of javax.servlet.jsp.PageContext.
• Using this object you can set,get or remove attribute from one of the following scopes:
 JSP Page Scope: PAGE_CONTEXT
 HTTP Request Scope: REQUEST_CONTEXT
 HTTP Session Scope: SESSION_CONTEXT
 Application Level Scope: APPLICATION_CONTEXT

index.html
<!DOCTYPE html>
<html>
<head>
<title>pageContext Implicit Object</title>
</head>
<body>
<form action="process.jsp">
<input type="text" placeholder="first name" name="userid"> <br><br>
<input type="text" placeholder="last name" name="password"> <br> <br>
</form>
</body>
</html>
process.jsp
<!DOCTYPE html>
<html>
<head>
<title>JSP PagContext </title>
</head>
<body>
<%
out.println("Hello :"+userid);
pageContext.setAttribute("UserName", userid, PageContext.SESSION_SCOPE);
pageContext.setAttribute("UserPassword", password, PageContext.SESSION_SCOPE);
%>
<br> <a href=“display.jsp">Check</a>
</body>
</html>

display.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<title>JSP PagContext </title>
</head>
<body>
<%
String username= (String) pageContext.getAttribute("UserName", PageContext.SESSION_SCOPE);
String userpassword= (String) pageContext.getAttribute("UserPassword", PageContext.SESSION_SCOPE);
out.println("Hi "+username+" you enter");
out.println("<br><br>");
out.println("Userid :"+username);
out.println("<br>");
out.println("Password :"+userpassword);
%>
</body>
</html>

7. JSP Exception Implicit Object
• In JSP, exception is a instance of java.lang.Throwable and used for Exception Handling.
• This object is only available for error pages and used for print Exception.
index.html
<html>
<head>
<title>Exception Implicit Object</title>
</head>
<body>
<form action="action.jsp">
First Number:<input type="text" name="fno" />
Second Number:<input type="text" name="sno" />
<input type="submit" value="submit"/>
</form>
</body>
</html>
action.jsp
<%@ page errorPage="exception.jsp" %>
<%
String num1=request.getParameter("fno");
String num2=request.getParameter("sno");
int s1= Integer.parseInt(num1);
int s2= Integer.parseInt(num2);
int exp= s1/s2;
out.print("Output is: "+ exp);
%>
exception.jsp
<%@ page isErrorPage="true" %>
Got this Exception: <%= exception %>

• JSP directives are used to give messages that tells the web container how to translate a
JSP page into the corresponding servlet.
Syntax of JSP Directive
<%@ directive attribute="value" %>
There are three types of directives:
•page directive
•include directive
•taglib directive

1. Page Directive with Example
• The page directive is used to defines attributes that apply to an entire JSP page.
• You can code page directives anywhere in your JSP page.
Syntax of JSP page Directive
<%@ page attribute="value" %>
Attributes of JSP page directive
1. import
2. contentType
3. extends
4. info
5. buffer
6. language
7. isELIgnored
8. isThreadSafe
9. autoFlush
10.session
11.pageEncoding
12.errorPage
13.isErrorPage

2. JSP Include Directive
• The JSP include directive is used to takes all the JSP file, HTML file or text file that exists on
the specified file and copies into the file that include statement.
• Include directive is very useful when we want to include the same JSP, HTML or text
file on multiple pages of a web application.
<%@ include file="filename" %>
JSP Include Directive Example
Assume we have a standard footer file called "footer.html", that looks like this:
footer.html
<p>Copyright © 2017
www.studentstutorial.com</p>

To include it in a JSP file use include statement
Example
<!DOCTYPE html>
<html>
<head>
<title>JSP include</title>
</head>
<body>
<% out.print("Welcome to JSP Tutorial"); %>
<%@ include file="footer.html" %> </body>
</html>
Output
Welcome to JSP Tutorial
Copyright © 2017 www.studentstutorial.com

3. JSP Taglib Directive
To define a tag library that defines many tags, JSP taglib directive is used. We use the TLD
(Tag Library Descriptor) file to define the tags.
The URI is the unique name for Tag Library.
Syntax JSP Taglib directive
<%@ taglib uri="uriofthetaglibrary" prefix="prefixoftaglibrary" %>
Example
For example, suppose the custlib tag library contains a tag called hello. If you wanted to
use the hello tag with a prefix of mytag, your tag would be <mytag:hello> and it will be
used in your JSP file as follows:
<%@ taglib uri="http://www.example.com/custlib" prefix="mytag" %>

<!DOCTYPE html>
<html>
<body>
<mytag:hello/>
</body>
</html>
• The JS API allows you to define custom JSP tags that look like HTML or XML tags
and a tag library is a set of user-defined tags that implement custom behavior.

4. JSP Exception Handling with Example
Exception
• Any unwanted or unexpected event that interrupts the normal flow of program execution is known
as exception.
• Generally Exception occurs when a user enter wrong data. It is a object that is thrown at run time.
Example :
Suppose we want to divide a number by zero in a Java application then it give a exception message
that java.lang.AirthmeticException: / by zero
That means a number can’t be divide by Zero.
So to handle this type of problem exception handling process is used.
In JSP, there are two ways to perform exception handling:
1. By errorPage and isErrorPage attributes of page directive
2. By element in web.xml file

exception.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1“ pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<title>JSP Exception</title>
</head>
<body>
<%
try{
int array[]={1,2,3,4,5};
int number=array[6];
out.println("7th element of array"+number);
} catch (Exception exp){
out.println("<h3>The number you try to access is not available :</h3> <br>" + exp);
}
%>
</body>
</html>
Exception Handling Example

1. Create a Table
<%@ page import="java.sql.*" %>
<html>
<head>
<title>Creating a Table</title>
</head>
<body>
<h1>Creating a Table</h1>
<%
Connection connection = null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection( “jdbc:oracle:thin:@localhost:1521:xe","system",“oracle");
Statement statement = connection.createStatement();
String query = "CREATE TABLE student (Id INTEGER, Name CHAR(50));";
statement.executeUpdate(query);
out.println("Table student create sucessfully.");
}
catch (Exception e)
{
out.println("An error occurred.");
}
%>
</body>
</html>

2. Insert Data JSP Source Code
index.html
<!DOCTYPE html>
<html>
<body>
<form method="post" action="process.jsp">
First name:<br>
<input type="text" name="first_name">
<br>
Last name:<br>
<input type="text" name="last_name">
<br>
City name:<br>
<input type="text" name="city_name">
<br>
Email Id:<br>
<input type="email" name="email">
<br><br>
<input type="submit" value="submit">
</form>
</body>
</html>

<%@page import="java.sql.*,java.util.*"%>
<%
String first_name=request.getParameter("first_name");
String last_name=request.getParameter("last_name");
String city_name=request.getParameter("city_name");
String email=request.getParameter("email");
try
{
Connection con=DriverManager.getConnection( “jdbc:oracle:thin:@localhost:1521:xe","system",“oracle");
Statement st=conn.createStatement();
int i=st.executeUpdate("insert into
users(first_name,last_name,city_name,email)values('"+first_name+"','"+last_name+"','"+city_name+"','"+email+"')");
out.println("Data is successfully inserted!");
}
catch(Exception e)
{
System.out.print(e);
e.printStackTrace();
}
%>
process.jsp

retrieve.jsp
2. Retrieve Data from database JSP
<%
String id = request.getParameter("userid");
try
{
Connection connection=DriverManager.getConnection( “jdbc:oracle:thin:@localhost:1521:xe","system",“oracle");
} catch (ClassNotFoundException e) {
}
%>
<!DOCTYPE html>
<html>
<body>
<h1>Retrieve data from database in jsp</h1>
<table border="1">
<tr>
<td>first name</td>
<td>last name</td>
<td>City name</td>
<td>Email</td>
</tr>

<%
try{
Statement statement=connection.createStatement();
String sql ="select * from users";
ResultSet resultSet = statement.executeQuery(sql);
while(resultSet.next()){
%>
<tr>
<td><%=resultSet.getString("first_name") %></td>
<td><%=resultSet.getString("last_name") %></td>
<td><%=resultSet.getString("city_name") %></td>
<td><%=resultSet.getString("email") %></td>
</tr>
<%
}
connection.close();
} catch (Exception e) {
}
%>
</table>
</body>
</html>
After retrieve the data from the data base the table look like this.

id first name last name City name Email Id
1 Divyasundar Sahu Mumbai divyasundar@g
mail.com
2 Hritika Sahu Pune hritika@gmail.
com
3 Milan Jena Chennai milanjena@gm
ail.com

3. Update Data in Database from JSP
Index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page import="java.io.*" %>
<%
String id = request.getParameter(“userid");
try
{
}
%>
<html>
<body>
<table border="1">
<tr>
<td>id</td>
<td>first name</td>
<td>last name</td>
<td>City name</td>
<td>Email</td>
<td>update</td>
</tr>

<%
try{
%>
<tr>
<</tr>td><a href="update.jsp?id=<%=resultSet.getString("id")%>">update</a></td>
<%
}
connection.close();
}
%>
</table>
</body>
</html>
id first name last name City name Email Id Action
1 Divyasundar Sahu Mumbai divyasundar
@gmail.com
Update
2 Hritika Sahu Pune hritika@gma
il.com
Update
3 Milan Jena Chennai milanjena@
gmail.com
Update

update.jsp
<%
String id = request.getParameter("id");
try
{
}
%>
<%
try{
String sql ="select * from users where id="+id;
%>

<!DOCTYPE html>
<html>
<body>
<h1>Update data from database in jsp</h1>
<form method="post" action="update-process.jsp">
<input type="hidden" name="id" value="<%=resultSet.getString("id") %>">
<input type="text" name="id" value="<%=resultSet.getString("id") %>">
<br>
First name:<br>
<input type="text" name="first_name" value="<%=resultSet.getString("first_name") %>">
<br>
Last name:<br>
<input type="text" name="last_name" value="<%=resultSet.getString("last_name") %>">
<br>
City name:<br>
<input type="text" name="city_name" value="<%=resultSet.getString("city_name") %>">
<br>
Email Id:<br>
<input type="email" name="email" value="<%=resultSet.getString("email") %>">
<br><br>
<input type="submit" value="submit">
</form>
<%
}
connection.close();
}
%>
</body>
</html>

update-process.jsp
<%@ page language="java" contentType="text/html;
charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%
String id = request.getParameter("id");
String first_name=request.getParameter("first_name");
String last_name=request.getParameter("last_name");
String city_name=request.getParameter("city_name");
if(id != null)
{
int personID = Integer.parseInt(id);
try
{
String sql="Update users set id=?,first_name=?,last_name=?,city_name=?,email=? where id="+id;
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1,id);
ps.setString(2, first_name);
ps.setString(3, last_name);
ps.setString(4, city_name);
ps.setString(5, email);
int i = ps.executeUpdate();

if(i > 0)
{
out.print("Record Updated Successfully");
}
else
{
out.print("There is a problem in updating Record.");
}
}
catch(SQLException sql)
{
request.setAttribute("error", sql);
out.println(sql);
}
}
%> id first name last name City name Email Id Action
1 Divyasundar Sahu Delhi divyasundar
sahu@gmail.
com
Update
2 Hritika Sahu Pune hritika@gma
il.com
Update
3 Milan Jena Chennai milanjena@
gmail.com
Update

4. Delete Data From Oracle using JSP
Index.jsp
<%
try
{
}
%>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<body>
<table border="1">
<tr>
<td>id</td>
<td>first name</td>
<td>last name</td>
<td>City name</td>
<td>Email</td>
<td>update</td>
</tr>

<%
try{
int i=0;
%>
<tr>
<td><a href="delete.jsp?id=<%=resultSet.getString("id") %>">
<button type="button" class="delete">Delete</button> </a>
</td></tr>
<%
i++;
}
connection.close();
}
%>
</table>
</body>
</html>

delete.jsp
<%
String id=request.getParameter("id");
try
{
int i=st.executeUpdate("DELETE FROM users WHERE id="+id);
out.println("Data Deleted Successfully!");
}
catch(Exception e)
{
}
%>

5. JSP login And Sign Up Form With Session
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>login</title>
</head>
<body>
<form action="login.jsp" method="post">
User name :<input type="text" name="usr" /><br>
password :<input type="password" name="password" /><br>
<input type="submit" />
</form>
<p>New user. <a href="register.html">Login Here</a>. </body>
</html>

login.jsp
<%
session.putValue("userid",userid);
Statement st= con.createStatement();
ResultSet rs=st.executeQuery("select * from users where userid='"+userid+"' and password='"+password+"'");
try{
rs.next();
if(rs.getString("password").equals(password)&&rs.getString("
userid").equals(userid))
{
out.println("Welcome " +userid);
}
else{
out.println("Invalid password or username.");
}
}
catch (Exception e) {
}
%>

register.html
<!DOCTYPE html>
<html>
<head>
<title>new registration</title>
</head>
<body>
<form action="reg-process.jsp" method="post">
First name :<input type="text" name="fname" />
Last name :<input type="text" name="lname" />
Email ID :<input type="text" name="email" />
User name :<input type="text" name="userid" />
password :<input type="password" name="password" />
</form>
</body>
</html>

reg-process.jsp
<%
try
{
int i=st.executeUpdate("insert into
users(fname,lname,email,userid,password)values('"+fname+"','"+lname+"','"+email+"','"+userid+"','"+password+"')");
out.println("Thank you for register ! Please <a href='index.html'>Login</a> to continue.");
}
catch(Exception e)
{
}
%>

6.Check duplicate userid or email ID before register JSP
register.html
<!DOCTYPE html>
<html>
<head>
<title>new registration</title>
</head>
<body>
<form action="reg-process.jsp" method="post">
First name :<input type="text" name="fname" />
Last name :<input type="text" name="lname" />
Email ID :<input type="text" name="email" />
User name :<input type="text" name="userid" />
password
:<input type="password" name="password" />
</form>
</body>
</html>

reg-process.jsp
<html>
<head>
<title>Count Rows JSP</title>
</head>
<body>
<%
try
{
Statement st=con.createStatement();
String strQuery = "SELECT COUNT(*) FROM users where email='"+email+"'";
ResultSet rs = st.executeQuery(strQuery);
rs.next();
String Countrow = rs.getString(1);out.println(Countrow);
if(Countrow.equals("0")){
int i=st.executeUpdate("insert into users(fname,lname,email,userid,password)values('"+fname+"','"+lname+"','"+email+"','"+userid+"','"+password+"')");
}
else{
out.println("User name or Email already exists !");
}
}
catch (Exception e){
}
%>
</body>
</html>

7. Change password in JSP
In this example my current password is "Admin@123" and i am going to change
into as "Admin@12345".
login.sql
CREATE TABLE `login` (
`id` int(10) NOT NULL,
`currentPassword` varchar(10) DEFAULT NULL,
`Newpass` varchar(10) DEFAULT NULL, PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1

index.html
<html>
<form action="changePassword.jsp" method="post">
<table>
<tr><td>Current Password</td><td><input type="password" name="current" ></td></tr>
<tr><td>New Password</td><td><input type="password" name="new"></td></tr>
<tr><td>Confirm Password</td><td><input type="password" name="confirm"></td></tr>
<tr><td><input type="submit" value="Change Password"></td></tr>
</table>
</form>
</html>

changePassword.jsp
<%@page import="java.sql.*"%>
<%@page import="java.io.*"%>
<%
String currentPassword=request.getParameter("current");
String Newpass=request.getParameter("new");
String conpass=request.getParameter("confirm");
int id=0;
try{
ResultSet rs=st.executeQuery("select * from login where password='"+currentPassword+"'");
while(rs.next()){
id=rs.getInt(1);
pass=rs.getString(3);
} System.out.println(id+ " "+pass);
if(pass.equals(currentPassword)){
Statement st1=con.createStatement();
int i=st1.executeUpdate("update login set password='"+Newpass+"' where id='"+id+"'");
out.println("Password changed successfully");
st1.close();
con.close();
}
else{
out.println("Invalid Current Password");
}
}
catch(Exception e){
out.println(e);
}
%>

8. Forgot password JSP
index.html
<!DOCTYPE html>
<html>
<head>
<title>Forgot Password JSP</title>
</head>
<body>
<h1>Forgot Password</h1>
<form action="forgot-process.jsp" method="post"><br><br>
Enter Email ID:<input type="text" name="email" /><br><br>
</form>
</body>
</html>

forgot-process.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"pageEncoding="ISO-8859-1"%>
<html>
<head>
<title>Count Rows JSP</title>
</head>
<body>
<%
try
{
String strQuery = "SELECT password FROM users where email='"+email+"'";
ResultSet rs = st.executeQuery(strQuery);
rs.next();
String Countrow = rs.getString(1);
if(Countrow.equals("1")){
/*mail code
paste your mail code here
------------------
Mail code*/
out.println("Password send to your email id successfully !");
}
else{
out.println("Invalid Email Id !");
}
}
catch (Exception e){
}
%>
</body>

9. How to insert image in Oracle database using JSP

References
1. https://www.studentstutorial.com/jsp/jsp-tutorial.php

JSP TUTORIAL for students M.Sc computer Science

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