Java Date操作大全代码,Java代码库,德仔网

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【Java】 Java Date操作大全
作者:Dezai.CN / 发布于2013/5/14/ 584

	package com.util;
	import java.text.DateFormat;
	import java.text.ParsePosition;
	import java.text.SimpleDateFormat;
	import java.util.Calendar;
	import java.util.Date;
	import java.util.GregorianCalendar;
	public class MyTestDate {
	// 用来全局控制 上一周，本周，下一周的周数变化
	private int weeks = 0;
	private int MaxDate;// 一月最大天数
	private int MaxYear;// 一年最大天数
	
	public static void main(String[] args) {
	 MyTestDate tt = new MyTestDate();
	 System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd"));
	 System.out.println("获取本周一日期:" + tt.getMondayOFWeek());
	 System.out.println("获取本周日的日期~:" + tt.getCurrentWeekday());
	 System.out.println("获取上周一日期:" + tt.getPreviousWeekday());
	 System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday());
	 System.out.println("获取下周一日期:" + tt.getNextMonday());
	 System.out.println("获取下周日日期:" + tt.getNextSunday());
	 System.out.println("获得相应周的周六的日期:" + tt.getNowTime("yyyy-MM-dd"));
	 System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth());
	 System.out.println("获取本月最后一天日期:" + tt.getDefaultDay());
	 System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst());
	 System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd());
	 System.out.println("获取下月第一天日期:" + tt.getNextMonthFirst());
	 System.out.println("获取下月最后一天日期:" + tt.getNextMonthEnd());
	 System.out.println("获取本年的第一天日期:" + tt.getCurrentYearFirst());
	 System.out.println("获取本年最后一天日期:" + tt.getCurrentYearEnd());
	 System.out.println("获取去年的第一天日期:" + tt.getPreviousYearFirst());
	 System.out.println("获取去年的最后一天日期:" + tt.getPreviousYearEnd());
	 System.out.println("获取明年第一天日期:" + tt.getNextYearFirst());
	 System.out.println("获取明年最后一天日期:" + tt.getNextYearEnd());
	 System.out.println("获取本季度第一天到最后一天:" + tt.getThisSeasonTime(11));
	 System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:"
	 + MyTestDate.getTwoDay("2008-12-1", "2008-9-29"));
	}
	
	public static String getTwoDay(String sj1, String sj2) {
	 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
	 long day = 0;
	 try {
	 java.util.Date date = myFormatter.parse(sj1);
	 java.util.Date mydate = myFormatter.parse(sj2);
	 day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
	 } catch (Exception e) {
	 return "";
	 }
	 return day + "";
	}
	
	public static String getWeek(String sdate) {
	 // 再转换为时间
	 Date date = MyTestDate.strToDate(sdate);
	 Calendar c = Calendar.getInstance();
	 c.setTime(date);
	 // int hour=c.get(Calendar.DAY_OF_WEEK);
	 // hour中存的就是星期几了，其范围 1~7
	 // 1=星期日 7=星期六，其他类推
	 return new SimpleDateFormat("EEEE").format(c.getTime());
	}
	
	public static Date strToDate(String strDate) {
	 SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
	 ParsePosition pos = new ParsePosition(0);
	 Date strtodate = formatter.parse(strDate, pos);
	 return strtodate;
	}
	
	public static long getDays(String date1, String date2) {
	 if (date1 == null || date1.equals(""))
	 return 0;
	 if (date2 == null || date2.equals(""))
	 return 0;
	 // 转换为标准时间
	 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
	 java.util.Date date = null;
	 java.util.Date mydate = null;
	 try {
	 date = myFormatter.parse(date1);
	 mydate = myFormatter.parse(date2);
	 } catch (Exception e) {
	 }
	 long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
	 return day;
	}
	// 计算当月最后一天,返回字符串
	public String getDefaultDay() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
	 lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
	 lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 上月第一天
	public String getPreviousMonthFirst() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
	 lastDate.add(Calendar.MONTH, -1);// 减一个月，变为下月的1号
	 // lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获取当月第一天
	public String getFirstDayOfMonth() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得本周星期日的日期
	public String getCurrentWeekday() {
	 weeks = 0;
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获取当天时间
	public String getNowTime(String dateformat) {
	 Date now = new Date();
	 SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);// 可以方便地修改日期格式
	 String hehe = dateFormat.format(now);
	 return hehe;
	}
	// 获得当前日期与本周日相差的天数
	private int getMondayPlus() {
	 Calendar cd = Calendar.getInstance();
	 // 获得今天是一周的第几天，星期日是第一天，星期二是第二天......
	 int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1
	 if (dayOfWeek == 1) {
	 return 0;
	 } else {
	 return 1 - dayOfWeek;
	 }
	}
	// 获得本周一的日期
	public String getMondayOFWeek() {
	 weeks = 0;
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获得相应周的周六的日期
	public String getSaturday() {
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获得上周星期日的日期
	public String getPreviousWeekSunday() {
	 weeks = 0;
	 weeks--;
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获得上周星期一的日期
	public String getPreviousWeekday() {
	 weeks--;
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获得下周星期一的日期
	public String getNextMonday() {
	 weeks++;
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	// 获得下周星期日的日期
	public String getNextSunday() {
	 int mondayPlus = this.getMondayPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
	 Date monday = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preMonday = df.format(monday);
	 return preMonday;
	}
	private int getMonthPlus() {
	 Calendar cd = Calendar.getInstance();
	 int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
	 cd.set(Calendar.DATE, 1);// 把日期设置为当月第一天
	 cd.roll(Calendar.DATE, -1);// 日期回滚一天，也就是最后一天
	 MaxDate = cd.get(Calendar.DATE);
	 if (monthOfNumber == 1) {
	 return -MaxDate;
	 } else {
	 return 1 - monthOfNumber;
	 }
	}
	// 获得上月最后一天的日期
	public String getPreviousMonthEnd() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.add(Calendar.MONTH, -1);// 减一个月
	 lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
	 lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得下个月第一天的日期
	public String getNextMonthFirst() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.add(Calendar.MONTH, 1);// 减一个月
	 lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得下个月最后一天的日期
	public String getNextMonthEnd() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.add(Calendar.MONTH, 1);// 加一个月
	 lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
	 lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得明年最后一天的日期
	public String getNextYearEnd() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.add(Calendar.YEAR, 1);// 加一个年
	 lastDate.set(Calendar.DAY_OF_YEAR, 1);
	 lastDate.roll(Calendar.DAY_OF_YEAR, -1);
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得明年第一天的日期
	public String getNextYearFirst() {
	 String str = "";
	 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	 Calendar lastDate = Calendar.getInstance();
	 lastDate.add(Calendar.YEAR, 1);// 加一个年
	 lastDate.set(Calendar.DAY_OF_YEAR, 1);
	 str = sdf.format(lastDate.getTime());
	 return str;
	}
	// 获得本年有多少天
	private int getMaxYear() {
	 Calendar cd = Calendar.getInstance();
	 cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
	 cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
	 int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
	 return MaxYear;
	}
	private int getYearPlus() {
	 Calendar cd = Calendar.getInstance();
	 int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
	 cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
	 cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
	 int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
	 if (yearOfNumber == 1) {
	 return -MaxYear;
	 } else {
	 return 1 - yearOfNumber;
	 }
	}
	// 获得本年第一天的日期
	public String getCurrentYearFirst() {
	 int yearPlus = this.getYearPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, yearPlus);
	 Date yearDay = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preYearDay = df.format(yearDay);
	 return preYearDay;
	}
	// 获得本年最后一天的日期 *
	public String getCurrentYearEnd() {
	 Date date = new Date();
	 SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
	 String years = dateFormat.format(date);
	 return years + "-12-31";
	}
	// 获得上年第一天的日期 *
	public String getPreviousYearFirst() {
	 Date date = new Date();
	 SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
	 String years = dateFormat.format(date);
	 int years_value = Integer.parseInt(years);
	 years_value--;
	 return years_value + "-1-1";
	}
	// 获得上年最后一天的日期
	public String getPreviousYearEnd() {
	 weeks--;
	 int yearPlus = this.getYearPlus();
	 GregorianCalendar currentDate = new GregorianCalendar();
	 currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks
	 + (MaxYear - 1));
	 Date yearDay = currentDate.getTime();
	 DateFormat df = DateFormat.getDateInstance();
	 String preYearDay = df.format(yearDay);
	 getThisSeasonTime(11);
	 return preYearDay;
	}
	// 获得本季度
	public String getThisSeasonTime(int month) {
	 int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
	 int season = 1;
	 if (month >= 1 && month <= 3) {
	 season = 1;
	 }
	 if (month >= 4 && month <= 6) {
	 season = 2;
	 }
	 if (month >= 7 && month <= 9) {
	 season = 3;
	 }
	 if (month >= 10 && month <= 12) {
	 season = 4;
	 }
	 int start_month = array[season - 1][0];
	 int end_month = array[season - 1][2];
	 Date date = new Date();
	 SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
	 String years = dateFormat.format(date);
	 int years_value = Integer.parseInt(years);
	 int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
	 int end_days = getLastDayOfMonth(years_value, end_month);
	 String seasonDate = years_value + "-" + start_month + "-" + start_days
	 + ";" + years_value + "-" + end_month + "-" + end_days;
	 return seasonDate;
	}
	
	private int getLastDayOfMonth(int year, int month) {
	 if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8
	 || month == 10 || month == 12) {
	 return 31;
	 }
	 if (month == 4 || month == 6 || month == 9 || month == 11) {
	 return 30;
	 }
	 if (month == 2) {
	 if (isLeapYear(year)) {
	 return 29;
	 } else {
	 return 28;
	 }
	 }
	 return 0;
	}
	
	public boolean isLeapYear(int year) {
	 return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
	}
	}
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