Parameter is passed to a servlet in request object from html page

In this example, we will show how a parameter is passed to a servlet in request object from html page.

index.html

<form method="post" action="check">
Name <input type="text" name="user" >
<input type="submit" value="submit">
</form>

web.xml

<servlet>
        <servlet-name>check</servlet-name>
        <servlet-class>MyServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>check</servlet-name>
        <url-pattern>/check</url-pattern>
    </servlet-mapping>

MyServlet.java

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class MyServlet extends HttpServlet {

  protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
       response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
           
            String user=request.getParameter("user");
            out.println("<h2> Welcome "+user+"</h2>");
        } finally {            
            out.close();
        }
    }
}

Output

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