SERVLET / NOTES</>↗Servlet16 Jun 2007
In a web application you might want to invalidate user session, for instance in a logout Servlet or JSP. There is an invalidate() method in the HttpSession interface, this method invalidates the session, and it removes all attributes from the session object. package org.kodejava.servlet; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.ht...
SERVLET / NOTES</>↗Servlet13 Jun 2007
package org.kodejava.servlet; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; @WebServlet(name = "ClientAddressServlet", urlPatterns = "/client-ip") public class ClientAddressServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest r...
CORE API / NOTES</>↗Core API12 Jun 2007
package org.kodejava.util; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.TimeZone; public class TimeZoneExample { public static void main(String[] args) { // Create a calendar object and set it time based on the local // time zone Calendar localTime = Calendar.getInstance(); localTime.set(Calendar.HOUR, 17); localTime.set(Calendar.MINUTE, 15); localTime.set(Calendar.SECOND, 20); int hour = localTime.get(Calendar.HOUR); int minute = localTime....
CORE API / NOTES</>↗Core API09 Jun 2007
package org.kodejava.util; import java.text.DecimalFormat; import java.text.NumberFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.Random; public class DefaultLocaleExample { public static void main(String[] args) { // Use Random class to generate some random number Random random = new Random(); // We use the system default locale to format a number and a date. NumberFormat formatter = […]
CORE API / NOTES</>↗Core API06 Jun 2007
package org.kodejava.net; import java.io.IOException; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; public class HttpResponseHeaderDemo { public static void main(String[] args) { try { URL url = new URL("https://kodejava.org/index.php"); URLConnection connection = url.openConnection(); Map<String, List<String>> responseMap = connection.getHeaderFields(); for (String key : responseMap.keySet()) { System.out.print(key + " = ");...
CORE API / NOTES</>↗Core API02 Jun 2007
package org.kodejava.net; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import java.nio.charset.StandardCharsets; public class URLDemo { public static void main(String[] args) { try { // Creating a url object by specifying each parameter separately, including // the protocol, hostname, port number, and the page name URL url = new URL("https", "kodejava.org", 443, "/index.php"); // We […]
