本文實例講述了Java實現(xiàn)按年月打印日歷功能。分享給大家供大家參考,具體如下:
創(chuàng)新互聯(lián)于2013年開始,先為宜豐等服務(wù)建站,宜豐等地企業(yè),進行企業(yè)商務(wù)咨詢服務(wù)。為宜豐企業(yè)網(wǎng)站制作PC+手機+微官網(wǎng)三網(wǎng)同步一站式服務(wù)解決您的所有建站問題。import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class CalendarBook { public static void main(String[] args) throws ParseException { CalendarBook cb = new CalendarBook(); cb.printWeekTitle(); cb.printCalendar(2018, 3); } public void printCalendar(int year, int month) throws ParseException { String monthStr; // 格式化月份,因為要轉(zhuǎn)成yyyyMMdd格式的 if (month < 10) { monthStr = "0" + month; } else { monthStr = month + ""; // 數(shù)字跟字符串拼接轉(zhuǎn)成字符串格式 } String yearMonthStr = year + monthStr; SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); Calendar calendarEnd = Calendar.getInstance(); Calendar calendarStart = Calendar.getInstance(); // 根據(jù)年份和月份得到輸入月份有多少天 int monthDays = getMonthLastDay(year, month); // 月初的date字符串 String dateStartStr = yearMonthStr + "01"; // 月末的date字符串 String dateEndStr = yearMonthStr + monthDays; Date startDate = sdf.parse(dateStartStr); Date endDate = sdf.parse(dateEndStr); calendarStart.setTime(startDate); calendarEnd.setTime(endDate); // 得到輸入月份有多少周 int weeks = calendarEnd.get(Calendar.WEEK_OF_MONTH); // 得到當月第一天是星期幾,這里周日為第一天,從1開始,周一則為2 int dayOfWeek = calendarStart.get(Calendar.DAY_OF_WEEK); int day = 1; // 當月的第一周做特殊處理,單獨打印一行 for (int i = 1; i <= 7; i++) { if (i >= dayOfWeek) { System.out.print(" " + day + " "); day++; } else { System.out.print(" "); } } System.out.println(); // 開始打印從第二周開始的日期 for (int week = 1; week < weeks; week++) { for (int i = 1; i <= 7; i++) { if (day > monthDays) { break; } if (day < 10) { System.out.print(" " + day + " "); } else { System.out.print(day + " "); } day++; } System.out.println(); } } public int getMonthLastDay(int year, int month) { int monthDay; int[][] day = { { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } }; if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { // 閏年 monthDay = day[1][month]; } else { monthDay = day[0][month]; } return monthDay; } public void printWeekTitle() { System.out.println("日" + " " + "一" + " " + "二" + " " + "三" + " " + "四" + " " + "五" + " " + "六"); } }
當前題目:Java實現(xiàn)按年月打印日歷功能【基于Calendar】-創(chuàng)新互聯(lián)
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