Kode Java

 
package org.kodejava.example.servlet;
 
import java.io.IOException;
 
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class ParameterCheck extends HttpServlet implements Servlet {
	private static final String EMPTY = "";
	
	public ParameterCheck() {
		super();
	}
 
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		
		String username = EMPTY;
		String password = EMPTY;
		
		//
		// Check if username parameter exists
		//
		if (request.getParameterMap().containsKey("username")) {
			username = request.getParameter("username");
		}
		
		//
		// Check if password parameter exists
		//
		if (request.getParameterMap().containsKey("password")) {
			password = request.getParameter("password");
		}
	}
 
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
	}
}
 
 

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