Write a servlet program for
- Registration Servlet to get the values from registration.html
- Write a Login servlet. Take input username and password from html file login.html and authenticate the user. Write the web.xml
1) Registration Servlet to get the values from registration.html
- Registration Servlet
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class RegistrationServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet RegistrationServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> Username: " + request.getParameter("username") + "</h1>");
out.println("<h1> Password: " + request.getParameter("password") + "</h1>");
out.println("</body>");
out.println("</html>");
}
catch(Exception ex) {
ex.printStackTrace();
}}
- Registration html
<!DOCTYPE html>
<html>
<head>
<title> Registration </title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>
<form action="RegistrationServlet" method="GET">
<p>Username: <input type="text" name="username"></p>
<p>Password: <input type="password" name="password"></p>
<input type="submit" value="Submit">
</form>
</div>
</body></html>
- Web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>RegistrationServlet</servlet-name>
<servlet-class>RegistrationServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RegistrationServlet</servlet-name>
<url-pattern>/RegistrationServlet</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config></web-app>
2) Write a Login servlet. Take input username and password from html file login.html and authenticate the user. Write the web.xml
- Login Servlet
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Login extends HttpServlet {
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) {
response.setContentType("text/html;charset=UTF-8");
try {
String username, pwd;
username = request.getParameter("username");
pwd = request.getParameter("password");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet Login</title>");
out.println("</head>");
out.println("<body>");
if(username.equals("diet") && pwd.equals("admin")) {
out.println("<h1> Login successfully...! </h1>");
}
else {
out.println("<h1> Wrong username or password..? </h1>");
}
out.println("</body>");
out.println("</html>");
}
catch(Exception ex) {
ex.printStackTrace();
}
}}
- Login html
<!DOCTYPE html>
<html>
<head>
<title> Login </title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>
<form action="Login" method="POST">
<p>Username: <input type="text" name="username" required> </p>
<p>Password: <input type="password" name="password" required> </p>
<input type="submit" value="Submit">
</form>
</div>
</body></html>
- Web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/Login</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config></web-app>
}
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