==========
<html>
<head>
<title>Multiple Buttons Demo </title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<form action="DemoServlet" method="get">
<p>Please enter the first number : <input type="text" name="first" ></p>
<p>Please enter the second number : <input type="text" name="second" ></p>
<p><input type="submit" name ="add" value="Addition" ></p>
<p><input type="submit" name="sub" value="Subtraction" ></p>
<p><input type="submit" name="end" value="END" ></p>
</form>
</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>DemoServlet</servlet-name>
<servlet-class>MultipleButtonsEx</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DemoServlet</servlet-name>
<url-pattern>/DemoServlet</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
MultipleButtonsEx.java
======================
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 MultipleButtonsEx extends HttpServlet {
protected void processRequest(HttpServletRequest p, HttpServletResponse q)
throws ServletException, IOException {
q.setContentType("text/html;charset=UTF-8");
PrintWriter out = q.getWriter();
String first = p.getParameter("first");
String second = p.getParameter("second");
if(first.equals("") || second.equals("")){
out.println("Invalid data try again");
return;
}
int fno = Integer.parseInt(first);
int sno = Integer.parseInt(second);
int result = 0;
if(p.getParameter("add") != null){
result = fno+sno;
out.println("<b> The result of the addition is </b> "+result);
}
if(p.getParameter("sub") != null){
result = fno - sno;
out.println("<b> The result of the subtraction is </b> "+result);
}
if(p.getParameter("end") != null){
out.println("<b> Thank You ");
out.println("Hace a nice day");
}
out.println("<br /><br />");
out.println("BYE, BYE");
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
}
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