Java Program -
index.html -
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<form method ="post" action="info">
<input type ="submit" value="GetClientInfo">
</form>
</body>
</html>
web.xml -
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
version="3.1">
<servlet>
<servlet-name>InfoServlet</servlet-name>
<servlet-class>ClientInfo</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>InfoServlet</servlet-name>
<url-pattern>/info</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
ClientInfo.java -
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ClientInfo extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html;charset=UTF=8");
PrintWriter out = response.getWriter();
try{
int serverPortNumber = request.getServerPort();
out.println("<h3> Server Port Number >"+serverPortNumber+"</h3>");
String protocol = request.getProtocol();
out.println("<h3>Protocol >"+protocol+"</h3>");
}
finally
{
out.close();
}
}
}
Output -
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