<input type=submit value="Submit">
</body>
</html>
The source code for PostParametersServlet.java is shown in the following listing. The
service( ) method is overridden to process client requests. The getParameterNames( ) method
returns an enumeration of the parameter names. These are processed in a loop. You can see
that the parameter name and value are output to the client. The parameter value is obtained
via the getParameter( ) method.
import java.io.*;
import java.util.*;
import javax.servlet.*;
public class PostParametersServlet
extends GenericServlet {
public void service(ServletRequest request,
ServletResponse response)
throws ServletException, IOException {
// Get print writer.
PrintWriter pw = response.getWriter();
// Get enumeration of parameter names.
Enumeration e = request.getParameterNames();
// Display parameter names and values.
while(e.hasMoreElements()) {
String pname = (String)e.nextElement();
pw.print(pname + " = ");
String pvalue = request.getParameter(pname);
pw.println(pvalue);
}
pw.close();
}
}
Compile the servlet. Next, copy it to the appropriate directory, and update the web.xml
file, as previously described. Then, perform these steps to test this example:
1. Start Tomcat (if it is not already running).
2. Display the web page in a browser.
3. Enter an employee name and phone number in the text fields.
4. Submit the web page.
After following these steps, the browser will display a response that is dynamically generated
by the servlet.
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