{"id":10177,"date":"2015-08-20T03:09:58","date_gmt":"2015-08-20T07:09:58","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/?p=10177"},"modified":"2015-08-01T09:15:38","modified_gmt":"2015-08-01T13:15:38","slug":"showcookies-java-servlet-that-displays-all-cookies-that-arrived-in-current-request-uses-the-servletutilities-class","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=10177","title":{"rendered":"ShowCookies.java Servlet that displays all cookies that arrived in current request. Uses the ServletUtilities class."},"content":{"rendered":"
ShowCookies.java  Servlet that displays all cookies that arrived in current request. Uses the ServletUtilities  class. \r\n\r\npackage cwp;\r\n\r\nimport java.io.*;\r\nimport javax.servlet.*;\r\nimport javax.servlet.http.*;\r\n\r\n\/** Sets six cookies: three that apply only to the current\r\n *  session (regardless of how long that session lasts)\r\n *  and three that persist for an hour (regardless of\r\n *  whether the browser is restarted).\r\n *<\/pre>\n
* Taken from Core Web Programming Java 2 Edition * from Prentice Hall and Sun Microsystems Press, * . * May be freely used or adapted. *\/ public class SetCookies extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { for(int i=0; i<3; i++) { \/\/ Default maxAge is -1, indicating cookie \/\/ applies only to current browsing session. Cookie cookie = new Cookie(“Session-Cookie-” + i, “Cookie-Value-S” + i); response.addCookie(cookie); cookie = new Cookie(“Persistent-Cookie-” + i, “Cookie-Value-P” + i); \/\/ Cookie is valid for an hour, regardless of whether \/\/ user quits browser, reboots computer, or whatever. cookie.setMaxAge(3600); response.addCookie(cookie); } response.setContentType(“text\/html”); PrintWriter out = response.getWriter(); String title = “Setting Cookies”; out.println (ServletUtilities.headWithTitle(title) + “\\n” + ”<\/p>\n
” + title + “<\/h1>\n
\\n\" +\r\n       \"There are six cookies associated with this page.\\n\" +\r\n       \"To see them, visit the\\n\" +\r\n       \"\\n\" +\r\n       \"ShowCookies<\/code> servlet<\/a>.\\n\" +\r\n       \"<\/pre>\n
\\n” + “Three of the cookies are associated only with the\\n” + “current session, while three are persistent.\\n” + “Quit the browser, restart, and return to the\\n” + “ShowCookies<\/code> servlet to verify that\\n” + “the three long-lived ones persist across sessions.\\n” + “”); } } ServletUtilities.java package cwp; import javax.servlet.*; import javax.servlet.http.*; \/** Some simple time savers. Note that most are static methods. *<\/p>\n
* Taken from Core Web Programming Java 2 Edition * from Prentice Hall and Sun Microsystems Press, * . * May be freely used or adapted. *\/ public class ServletUtilities { public static final String DOCTYPE = “”; public static String headWithTitle(String title) { return(DOCTYPE + “\\n” + “\\n” + “\\n”); } \/** Read a parameter with the specified name, convert it * to an int, and return it. Return the designated default * value if the parameter doesn’t exist or if it is an * illegal integer format. *\/ public static int getIntParameter(HttpServletRequest request, String paramName, int defaultValue) { String paramString = request.getParameter(paramName); int paramValue; try { paramValue = Integer.parseInt(paramString); } catch(NumberFormatException nfe) { \/\/ null or bad format paramValue = defaultValue; } return(paramValue); } \/** Given an array of Cookies, a name, and a default value, * this method tries to find the value of the cookie with * the given name. If there is no cookie matching the name * in the array, then the default value is returned instead. *\/ public static String getCookieValue(Cookie[] cookies, String cookieName, String defaultValue) { if (cookies != null) { for(int i=0; i<cookies.length; i++)=”” {=”” cookie=”” if=”” (cookiename.equals(cookie.getname()))=”” return(cookie.getvalue());=”” }=”” return(defaultvalue);=”” **=”” given=”” an=”” array=”” of=”” cookies=”” and=”” a=”” name,=”” this=”” method=”” tries=”” *=”” to=”” find=”” return=”” the=”” from=”” that=”” has=”” name.=”” there=”” is=”” no=”” matching=”” name=”” in=”” array,=”” null=”” returned.=”” public=”” static=”” getcookie(cookie[]=”” cookies,=”” string=”” cookiename)=”” (cookies=”” !=”null)” for(int=”” i=”0;” i<cookies.length;=”” return(cookie);=”” return(null);=”” string,=”” replaces=”” all=”” occurrences=”” ‘<‘=”” with=”” ‘<‘,=”” ‘=””>’ with * ‘>’, and (to handle cases that occur inside attribute * values), all occurrences of double quotes with * ‘”‘ and all occurrences of ‘&’ with ‘&’. * Without such filtering, an arbitrary string * could not safely be inserted in a Web page. *\/ public static String filter(String input) { StringBuffer filtered = new StringBuffer(input.length()); char c; for(int i=0; i<input.length(); i++)=”” {=”” c=”input.charAt(i);” if=”” (c=”=” ‘<‘)=”” filtered.append(“<“);=”” }=”” else=”” ‘=””>’) { filtered.append(“>”); } else if (c == ‘”‘) { filtered.append(“””); } else if (c == ‘&’) { filtered.append(“&”); } else { filtered.append(c); } } return(filtered.toString()); } }<\/p>\n","protected":false},"excerpt":{"rendered":"
ShowCookies.java Servlet that displays all cookies that arrived in current request. Uses the ServletUtilities class. package cwp; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; \/** Sets six cookies: three that apply only to the current * session (regardless of how long that session lasts) * and three that persist for an hour (regardless of * whether … <\/p>\n
Continue reading<\/a><\/p>\n","protected":false},"author":130,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1417,1424],"tags":[1368,308,1457],"class_list":["post-10177","post","type-post","status-publish","format-standard","hentry","category-code-programming-samples--","category-javaj2eej2me","tag-cookie","tag-java","tag-servlet","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":26551,"url":"http:\/\/bangla.sitestree.com\/?p=26551","url_meta":{"origin":10177,"position":0},"title":"ShowCookies.java  Servlet that displays all cookies that arrived in current request. Uses the ServletUtilities  class. #Programming Code Examples #Java\/J2EE\/J2ME #Servlet","author":"Author-Check- Article-or-Video","date":"April 28, 2021","format":false,"excerpt":"ShowCookies.java Servlet that displays all cookies that arrived in current request. Uses the ServletUtilities class. package cwp; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; \/** Sets six cookies: three that apply only to the current * session (regardless of how long that session lasts) * and three that persist for an\u2026","rel":"","context":"In "FromSitesTree.com"","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10175,"url":"http:\/\/bangla.sitestree.com\/?p=10175","url_meta":{"origin":10177,"position":1},"title":"SetCookies.java Servlet that sets a few persistent and session cookies. Uses the ServletUtilities class to simplify the DOCTYPE and HEAD output.","author":"","date":"August 19, 2015","format":false,"excerpt":"SetCookies.java\u00a0 Servlet that sets a few persistent and session cookies. Uses the ServletUtilities\u00a0 class to simplify the DOCTYPE and HEAD output. \u00a0 package cwp; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; \/** Sets six cookies: three that apply only to the current \u00a0*\u00a0 session (regardless of how long that session lasts)\u2026","rel":"","context":"In "Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8"","block_context":{"text":"Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8","link":"http:\/\/bangla.sitestree.com\/?cat=1417"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":26549,"url":"http:\/\/bangla.sitestree.com\/?p=26549","url_meta":{"origin":10177,"position":2},"title":"SetCookies.java  Servlet that sets a few persistent and session cookies. Uses the ServletUtilities  class to simplify the DOCTYPE and HEAD output. #Programming Code Examples #Java\/J2EE\/J2ME #Servlet","author":"Author-Check- Article-or-Video","date":"April 28, 2021","format":false,"excerpt":"SetCookies.java Servlet that sets a few persistent and session cookies. Uses the ServletUtilities class to simplify the DOCTYPE and HEAD output. package cwp; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; \/** Sets six cookies: three that apply only to the current * session (regardless of how long that session lasts) *\u2026","rel":"","context":"In "FromSitesTree.com"","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10162,"url":"http:\/\/bangla.sitestree.com\/?p=10162","url_meta":{"origin":10177,"position":3},"title":"ThreeParams.java Servlet that reads and displays three request (form) parameters. Uses the ServletUtilities class.","author":"","date":"August 16, 2015","format":false,"excerpt":"ThreeParams.java\u00a0 Servlet that reads and displays three request (form) parameters. Uses the ServletUtilities\u00a0 class. package cwp; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; \/** Simple servlet that reads three parameters from the \u00a0*\u00a0 form data. \u00a0* \u00a0 \u00a0*\u00a0 Taken from Core Web Programming Java 2 Edition \u00a0*\u00a0 from Prentice Hall and\u2026","rel":"","context":"In "Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8"","block_context":{"text":"Code . 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