Quizas a usted alguna vez le toco programar como encontrar el \u00faltimo d\u00eda h\u00e1bil del mes. La definici\u00f3n:<\/p>\n
Es el \u00faltimo d\u00eda del mes, que no cae un fin de semana y que no es un d\u00eda feriado.<\/p><\/blockquote>\n
Para trabajar este ejemplo utilizaremos fechas de los Estados Unidos, mercado de finanzas. En el caso de los d\u00edas feriados, vamos a utilizar el calendario de OCC<\/a> (Options Clearing Corporation<\/a>). Dependiendo del \u00e1rea y pa\u00eds en donde usted trabaje el calendario de las fechas ser\u00e1 distinto (por ejemplo Estados Unidos y Venezuela).<\/p>\n
La soluci\u00f3n en Java es sencilla, usando la clase Calendar<\/a>. Despu\u00e9s de jugar un poco al final termin\u00e9 escribiendo esta clase que muestra el \u00faltimo d\u00eda h\u00e1bil del mes y le dice a usted si la fecha entrada por el teclado es un d\u00eda h\u00e1bil o no:<\/p>\n
package com.kodegeek.blog.finance;\r\n\r\nimport java.text.DateFormat;\r\nimport java.text.ParseException;\r\nimport java.text.SimpleDateFormat;\r\nimport java.util.Calendar;\r\nimport java.util.Date;\r\nimport java.util.HashSet;\r\nimport java.util.ResourceBundle;\r\nimport java.util.Scanner;\r\nimport java.util.Set;\r\nimport java.util.logging.Logger;\r\n\r\n\/**\r\n * Helper date methods tailored for the financial industry.\r\n * License: LGPL\r\n * BLOG: http:\/\/kodegeek.com\r\n * @author josevnz@kodegeek.com\r\n *\r\n *\/\r\npublic final class DateHelper {\r\n\r\n\tprivate final static ResourceBundle BUNDLE;\r\n\tprivate final static Logger log;\r\n\tprivate static final Set holidays;\r\n\r\n\tstatic {\r\n\r\n\t\tBUNDLE = ResourceBundle.getBundle(DateHelper.class.getName());\r\n\r\n\t\tlog = Logger.getLogger(DateHelper.class.getName());\r\n\r\n\t\t\/\/ Populate the holidays set\r\n\t\tholidays = new HashSet();\r\n\t\tfor (String dateStr: BUNDLE.getString(\"com.kodegeek.blog.finance.DateHelper.holidays\").split(\";\\\\s*\", -1)) {\r\n\t\t\ttry {\r\n\t\t\t\tholidays.add(DateFormat.getDateInstance(DateFormat.DEFAULT).parse(dateStr));\r\n\t\t\t} catch (ParseException e) {\r\n\t\t\t\tlog.warning(String.format(BUNDLE.getString(\"com.kodegeek.blog.finance.DateHelper.error.badDate\"), dateStr));\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t}\r\n\r\n\t\/**\r\n\t * Default constructor\r\n\t *\/\r\n\tprivate DateHelper() {\r\n\t\t\/\/ Only static methods go on this class\r\n\t}\r\n\r\n\t\/**\r\n\t * Check if a given date is the last business day of the month\r\n\t * @param aDate The date to test\r\n\t * @return True if is the last day of the month, false otherwise\r\n\t *\/\r\n\tpublic final static boolean isLastBusinessDayOfMonth(final Date aDate) {\r\n\t\tboolean isLastBusinessDay = false;\r\n\r\n\t\t\/\/ Can do a comparison?\r\n\t\tif (aDate == null) {\r\n\t\t\treturn isLastBusinessDay;\r\n\t\t}\r\n\r\n\t\tCalendar calendar = Calendar.getInstance();\r\n\r\n\t\t\/\/ Current date on a weekend\r\n\t\tcalendar.setTime(aDate);\r\n\t\tint day = calendar.get(Calendar.DAY_OF_MONTH);\r\n\t\tint month = calendar.get(Calendar.MONTH);\r\n\t\tint year = calendar.get(Calendar.YEAR);\r\n\r\n\t\tint lastbusinessDayOfMonth = getLastBusinessDayOfMonth(month, year);\r\n\t\tif (lastbusinessDayOfMonth == day) {\r\n\t\t\tisLastBusinessDay = true;\r\n\t\t}\r\n\r\n\t\treturn isLastBusinessDay;\r\n\t}\r\n\r\n\t\/**\r\n\t * Get the last business day of the month for a given month \/ year combination\r\n\t * @param month The month\r\n\t * @param year The year\r\n\t * @return The last business day\r\n\t *\/\r\n\tpublic static int getLastBusinessDayOfMonth(final int month, final int year) {\r\n\t\tint day = -1;\r\n\t\tCalendar calendar = Calendar.getInstance();\r\n\t\tcalendar.set(Calendar.MONTH, month);\r\n\t\tcalendar.set(Calendar.YEAR, year);\r\n\t\tcalendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));\r\n\r\n\t\t\/\/ Keep looking backwards until the day is not a weekend or a holiday\r\n\t\twhile(true) {\r\n\t\t\tif (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY) {\r\n\t\t\t\tcalendar.add(Calendar.DAY_OF_MONTH, -1);\r\n\t\t\t\tcontinue;\r\n\t\t\t} else if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {\r\n\t\t\t\tcalendar.add(Calendar.DAY_OF_MONTH, -2);\r\n\t\t\t\tcontinue;\r\n\t\t\t} else if (holidays.contains(calendar.getTime())) {\r\n\t\t\t\tcalendar.add(Calendar.DAY_OF_MONTH, -1);\r\n\t\t\t\tcontinue;\r\n\t\t\t}\r\n\t\t\tbreak;\r\n\t\t} \/\/ End while\r\n\t\tday = calendar.get(Calendar.DAY_OF_MONTH);\r\n\t\treturn day;\r\n\t}\r\n\r\n\t\/**\r\n\t * Unit test, load today date and check if is a end of the month\r\n\t * @param args The date to test from the command line\r\n\t * @throws Exception If the date is invalid for the given local\r\n\t *\/\r\n\tpublic static void main(String [] args) throws Exception {\r\n\t\tScanner scan = new Scanner(System.in);\r\n\t\tdo {\r\n\t\t\tString currDateStr = null;\r\n\t\t\tSimpleDateFormat format = new SimpleDateFormat(\"yy-M-d\");\r\n\t\t\ttry {\r\n\t\t\t\tSystem.out.println(\"Please enter a date to check (YYYY-MM-DD, Ctrl-C to exit):\");\r\n\t\t\t\tcurrDateStr = scan.nextLine();\r\n\t\t\t\tDate date = format.parse(currDateStr);\r\n\r\n\t\t\t\tif (date != null) {\r\n\t\t\t\t\tCalendar calendar = Calendar.getInstance();\r\n\t\t\t\t\tcalendar.setTime(date);\r\n\t\t\t\t\tint month = calendar.get(Calendar.MONTH);\r\n\t\t\t\t\tint year = calendar.get(Calendar.YEAR);\r\n\t\t\t\t\tSystem.out.println(String.format(\"Last business day of the month: %d\", getLastBusinessDayOfMonth(month, year)));\r\n\t\t\t\t\tSystem.out.println(String.format(\"%s %s\", currDateStr,isLastBusinessDayOfMonth(date) == true? \"Is the last business day\": \"Is not the last business day\"));\r\n\t\t\t\t}\r\n\t\t\t} catch (ParseException pExp) {\r\n\t\t\t\tSystem.err.println(String.format(\"Ignoring bad date: '%s'\", currDateStr));\r\n\t\t\t}\r\n\t\t} while (true);\r\n\t}\r\n\r\n}<\/pre>\nEl resource bundle lo \u00fanico que contiene son los d\u00edas feriados:<\/p>\n
# Bank holidays per OCC calendar 2009 - http:\/\/www.optionsclearing.com\/market\/infomemos\/2008\/oct\/24961.pdf\r\ncom.kodegeek.blog.finance.DateHelper.holidays=Jan 01, 2009;January 19, 2009; Feb 26, 2009;Apr 10, 2009;May 25, 2009;July 3, 2009; Sep 7, 2009; Nov 26, 2009; Dec 25, 2009; Oct 12, 2009; Nov 11, 2009\r\ncom.kodegeek.blog.finance.DateHelper.error.badDate=Got bad date '%s' from property<\/pre>\nLa idea es buscar el \u00faltimo d\u00eda del mes y de all\u00ed contar hacia atr\u00e1s, esquivando fines de semana y d\u00edas feriados.<\/p>\n
Please enter a date to check (YYYY-MM-DD, Ctrl-C to exit):
\n2009-02-27<\/span>
\nLast business day of the month: 27
\n2009-02-27 Is the last business day<\/p><\/blockquote>\nEn una siguiente entrega les mostrar\u00e9 como hacer lo mismo en Ruby.<\/p>\n
Blogalaxia:calendar<\/a>, calendario<\/a>, java.perl.ruby<\/a>, occ<\/a>
\nTechnorati:calendar<\/a>, calendario<\/a>, java.perl.ruby<\/a>, occ<\/a>
\nTo2blogs:calendar<\/a>, calendario<\/a>, java.perl.ruby<\/a>, occ<\/a>
\nDel.icio.us:calendar<\/a>, calendario<\/a>, java.perl.ruby<\/a>, occ<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Quizas a usted alguna vez le toco programar como encontrar el \u00faltimo d\u00eda h\u00e1bil del mes. La definici\u00f3n: Es el \u00faltimo d\u00eda del mes, que no cae un fin de semana y que no es un d\u00eda feriado. Para trabajar este ejemplo utilizaremos fechas de los Estados Unidos, mercado de finanzas. En el caso de […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9,10,438,449],"tags":[451,450,757,452],"_links":{"self":[{"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/posts\/1467"}],"collection":[{"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/comments?post=1467"}],"version-history":[{"count":20,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/posts\/1467\/revisions"}],"predecessor-version":[{"id":1542,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/posts\/1467\/revisions\/1542"}],"wp:attachment":[{"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/media?parent=1467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/categories?post=1467"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kodegeek.com\/blog\/wp-json\/wp\/v2\/tags?post=1467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}