Java 项目常用的日期方法class
package com.school.util;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.List;/** * 提供一些跟日期相关的通用方法。 * @author nimade */public abstract class SchoolDateUtils {/*** “今日”的开始时间。*/public static Date getTodayStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));return cal.getTime();}/*** “今日”的结束时间。*/public static Date getTodayEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));return cal.getTime();}/*** “昨日”的开始时间。*/public static Date getYesterdayStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));// 昨日cal.add(Calendar.DAY_OF_MONTH, -1);return cal.getTime();}/*** “昨日”的结束时间。*/public static Date getYesterdayEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 昨日cal.add(Calendar.DAY_OF_MONTH, -1);return cal.getTime();}/*** 最近几天前的时间。*/public static Date getRecentDateStart(Integer day) {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 以前的时间cal.add(Calendar.DAY_OF_MONTH, -day);//由当前时间，推算出几天前的时间return cal.getTime();}/*** 未來几天前的时间。*/public static Date getFutureDateStart(Integer day) {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 以前的时间cal.add(Calendar.DAY_OF_MONTH, +day);//由当前时间，推算出將來的时间return cal.getTime();}/*** “前天”的开始时间。*/public static Date getQianTianStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));// 前天cal.add(Calendar.DAY_OF_MONTH, -2);return cal.getTime();}/*** “前天”的结束时间。*/public static Date getQianTianEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.get(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 前天cal.add(Calendar.DAY_OF_MONTH, -2);return cal.getTime();}/*** “本周”的开始时间。*/public static Date getThisWeekStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); // 周日cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));return cal.getTime();}/*** “本周”的结束时间。*/public static Date getThisWeekEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY); // 周六cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));return cal.getTime();}/*** “上周”的开始时间。*/public static Date getLastWeekStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); // 周日cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));// 上周cal.add(Calendar.DATE, -7);return cal.getTime();}/*** “上周”的结束时间。*/public static Date getLastWeekEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY); // 周六cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 上周cal.add(Calendar.DATE, -7);return cal.getTime();}/*** “本月”的开始时间。*/public static Date getThisMonthStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.getActualMinimum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));return cal.getTime();}/*** “本月”的结束时间。*/public static Date getThisMonthEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.getActualMaximum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));return cal.getTime();}/*** “上月”的开始时间。*/public static Date getLastMonthStart() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.getActualMinimum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));// 上月cal.add(Calendar.MONTH, -1);return cal.getTime();}/*** “上月”的结束时间。*/public static Date getLastMonthEnd() {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, now.get(Calendar.YEAR));cal.set(Calendar.MONTH, now.get(Calendar.MONTH));cal.set(Calendar.DAY_OF_MONTH, now.getActualMaximum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));// 上月cal.add(Calendar.MONTH, -1);return cal.getTime();}/****************根据传进来的数字，，获取某一年，某一个月的开始日期，与结束日期*********************//*** “根据传进来的数字”的开始时间。*/public static Date getNumMonthStart(Integer year,Integer month) {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();java.util.Date date;try {date = new SimpleDateFormat("yyyy-MM-dd").parse(year.toString()+"-"+month.toString()+"-"+"01");now.setTime(date);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}cal.set(Calendar.YEAR, year);cal.set(Calendar.MONTH, month-1);cal.set(Calendar.DAY_OF_MONTH, now.getActualMinimum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMinimum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMinimum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMinimum(Calendar.MILLISECOND));return cal.getTime();}/*** "根据传进来的数字"的结束时间。*/public static Date getNumMonthEnd(Integer year,Integer month) {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();java.util.Date date;try {date = new SimpleDateFormat("yyyy-MM-dd").parse(year.toString()+"-"+month.toString()+"-"+"01");now.setTime(date);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}cal.set(Calendar.YEAR, year);cal.set(Calendar.MONTH, month-1);cal.set(Calendar.DAY_OF_MONTH, now.getActualMaximum(Calendar.DAY_OF_MONTH));cal.set(Calendar.HOUR_OF_DAY, now.getActualMaximum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));return cal.getTime();}/**** 获取指定月份的所用日期*//*** "根据传进来的数字"的结束时间。*/public static List<String> getNumMonthAll(Integer year,Integer month) {Calendar now = Calendar.getInstance();Calendar cal = Calendar.getInstance();List<String> monthOfDayList=new ArrayList<String>();java.util.Date date;try {date = new SimpleDateFormat("yyyy-MM-dd").parse(year.toString()+"-"+month.toString()+"-"+"01");now.setTime(date);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}cal.set(Calendar.YEAR, year);cal.set(Calendar.MONTH, month-1);cal.set(Calendar.DAY_OF_MONTH, now.getActualMaximum(Calendar.DAY_OF_MONTH));int day=now.getActualMaximum(Calendar.DAY_OF_MONTH);//获取指定月份的最大天数for(int i=1;i<=day;i++){cal.set(Calendar.DAY_OF_MONTH, i);cal.set(Calendar.HOUR_OF_DAY, now.getActualMinimum(Calendar.HOUR_OF_DAY));cal.set(Calendar.MINUTE, now.getActualMaximum(Calendar.MINUTE));cal.set(Calendar.SECOND, now.getActualMaximum(Calendar.SECOND));cal.set(Calendar.MILLISECOND, now.getActualMaximum(Calendar.MILLISECOND));Date dateC = cal.getTime();SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");monthOfDayList.add(sdf.format(dateC));}return monthOfDayList;}}
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