Answer:
In this example we will check if the user is eligible for voting or not. If the age is greater than 17, then user is eligible to vote. There is one html page which takes name and age from the user.
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>VoterApp</title>
</head>
<body>
<form action= "vturl" method="get">
<fieldset style="width:20%; background-color:#80ffcc">
<table>
<tr><td>Name</td><td><input type="text" name="name"></td></tr>
<tr><td>Age</td><td><input type="text" name="age"></td></tr>
<tr><td></td><td><input type = "submit" value="check voting eligibility"></td></tr>
</table>
</fieldset>
</form>
</body>
</html>
VoterSrv.java
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class VoterSrv extends HttpServlet
{
public void service(HttpServletRequest req, HttpServletResponse res) throws IOException,ServletException
{
//set response content type
res.setContentType("text/html");
//get printWrite obj
PrintWriter pw = res.getWriter();
//read form data from page as request parameter
String name = req.getParameter("name");
int age = Integer.parseInt(req.getParameter("age"));
if (age>=18)
{
pw.println("<font color='green' size='4'>"+name+" you are eligible to vote</font>");
}
else
pw.println("<font color='red' size='4'>"+name+" you are not eligible to vote</font>");
//add hyperlink to dynamic page
pw.println("<br><br><a href= 'index.html'>Home</a>");
//close the stream
pw.close();
}
}
web.xml
<web-app>
<servlet>
<servlet-name>abc</servlet-name>
<servlet-class>VoterSrv</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>abc</servlet-name>
<url-pattern>/vturl</url-pattern>
</servlet-mapping>
</web-app>
Output:
