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Get parameters passed to a servletTag(s): Servlet/JSP


<HTML>
    <HEAD></HEAD>
    <BODY>
        <FORM METHOD=POST ACTION="/servlet/MyServlet">
            value : <INPUT TYPE="TEXT" NAME="someValue">
        </FORM>
    </BODY>
</HTML>


import javax.servlet.*;
import javax.servlet.http.*;

public class MyServlet extends HttpServlet {
  public void doPost(HttpServletRequest req, HttpServletResponse res) {
    // note : if "someValue" is missing a null is returned
    String valuePassed = req.getParameter("someValue");
    res.setContentType("text/html");

    java.io.PrintWriter out = res.getWriter();
    out.println("<html><head></head><body>");
    out.println("the value is : " + valuePassed);
    out.println("</body></html>");    
    }
    
  public void doGet(HttpServletRequest req, HttpServletResponse res) {
    doPost(req, res);
    }
    
}