package hall; import javax.servlet.*; import javax.servlet.http.*; /** Some simple time savers. * Part of tutorial on servlets and JSP that appears at * http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/ * 1999 Marty Hall; may be freely used or adapted. */ public class ServletUtilities { public static final String DOCTYPE = ""; public static String headWithTitle(String title) { return(DOCTYPE + "\n" + "\n" + "" + title + "\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) { // Handles null and bad format paramValue = defaultValue; } return(paramValue); } public static String getCookieValue(Cookie[] cookies, String cookieName, String defaultValue) { for(int i=0; i