Calendar 日历

 

1

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

public class CalendarMethod {

	
/**
 * 
 * @param year
 * @param month
 * @param day
 * @return String[] 输入日期所在的一个星期的值
 */
	public static String [] getWeek(int year,int month,int day, String format){
		
		String  dayArgs[] = new String[7];
		
		Date date = new Date();
		if(format == null || "".equals(format)) {
			format = "yyyy-MM-dd";
		}
		SimpleDateFormat sd = new SimpleDateFormat(format);
		Calendar c = Calendar.getInstance();		//当前日期
		c.set(year, month-1, day);                      //设定日期,实际月份要-1,这里7表示8月份
		int iDay = c.get(Calendar.DAY_OF_WEEK);           //当天是星期几
		c.add(Calendar.DAY_OF_MONTH, -iDay + 1);       //取到星期一的时间
		for(int j = 0; j < 7; j++){                   //获得当天在的一个星期
			c.add(Calendar.DAY_OF_MONTH, 1);
//			System.out.println(c.getTime());
			date = c.getTime();
			dayArgs[j]= sd.format(date);
//			list.add(sd.format(date));
		}
		return dayArgs;
		
	}
	
	/**
	 * 
	 * @param year
	 * @param month
	 * @param day
	 * @param format 日期显示格式，默认为 yyyy-MM-dd
	 * @return 输入日期所在月的，所有日期的String值
	 */
	public static String [] getMonth(int year,int month, int day ,String format){
		
		Date date = new Date();
		Calendar c = Calendar.getInstance();		
		if(format == null || "".equals(format)) {
			format = "yyyy-MM-dd";
		}
		SimpleDateFormat sd = new SimpleDateFormat(format);
		
		c.set(year, month-1, day);
		int iMonth = c.get(Calendar.MONTH);
		int iDate = c.get(Calendar.DAY_OF_MONTH); //当天的月份
		
		int iMaxDate = c.getActualMaximum(Calendar.DAY_OF_MONTH);//当月有几天
		String [] monthList = new String[iMaxDate];
		
		c.add(Calendar.DAY_OF_MONTH, -iDate);
		for(int i = 0; i < iMaxDate; i++) {//当天的一个月
			c.add(Calendar.DAY_OF_MONTH, 1);
			date = c.getTime();
	        monthList[i] = sd.format(date);
		}
		
		return monthList;
	}
	
	
	
	
	
	public static String [] getWeek(int year,int month,int day){
		return getWeek(year, month, day, "");
	}
	
	public static Date [] getWeekDate(int year,int month,int day){
		
		Date  dayArgs[] = new Date[7];
		
		Date date = new Date();
		SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
		Calendar c = Calendar.getInstance();		//当前日期
		c.set(year, month-1, day);                      //设定日期,实际月份要-1,这里7表示8月份
		int iDay = c.get(Calendar.DAY_OF_WEEK);           //当天是星期几
		c.add(Calendar.DAY_OF_MONTH, -iDay + 1);       //取到星期一的时间
		for(int j = 0; j < 7; j++){                   //获得当天在的一个星期
			c.add(Calendar.DAY_OF_MONTH, 1);
//			System.out.println(c.getTime());
			date = c.getTime();
			dayArgs[j]= date; //sd.format(date);
//			list.add(sd.format(date));
		}
		return dayArgs;
		
	}
	
	public static Date [] getMonthDate(int year,int month, int day){
		
		Date date = new Date();
		Calendar c = Calendar.getInstance();		
		
		c.set(year, month-1, day);
		int iMonth = c.get(Calendar.MONTH);
		int iDate = c.get(Calendar.DAY_OF_MONTH); //当天的月份
		
		int iMaxDate = c.getActualMaximum(Calendar.DAY_OF_MONTH);//当月有几天
		Date [] monthList = new Date[iMaxDate];
		
		c.add(Calendar.DAY_OF_MONTH, -iDate);
		for(int i = 0; i < iMaxDate; i++) {//当天的一个月
			c.add(Calendar.DAY_OF_MONTH, 1);
			date = c.getTime();
	        monthList[i] = date;
		}
		
		return monthList;
	}
	
	
	public static String format(Date date, String format) {
		if(format == null || "".equals(format)) {
			format = "yyyy-MM-dd";
		}
		SimpleDateFormat sd = new SimpleDateFormat(format);
		return sd.format(date);
	}
	
	
	public static void main(String[] args) {
		Date date = new Date();
//		SimpleDateFormat sd = new SimpleDateFormat("EEE");//得到星期几
//		System.out.println(sd.format(date));
//		System.out.println(date);
	    SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
	    String[] time = sd.format(date).split("-");
	    int year = Integer.parseInt(time[0]);
	    int month = Integer.parseInt(time[1]);
	    int day = Integer.parseInt(time[2]);
	    String [] list = getWeek( year, month, day);
	    for (int i = 0; i < list.length; i++) {
			System.out.println(list[i]);
		}
		System.out.println("******************************************************");
	    System.out.println("<table border=1>");
	    String strBlank = "&nbsp;";
		Date[]monthList = getMonthDate(2009,7,13);
		Calendar c = Calendar.getInstance();		
		c.setTime(monthList[0]);
		int iDay = c.get(Calendar.DAY_OF_WEEK);
		int k = (iDay - Calendar.MONDAY) >= 0 ? (iDay - Calendar.MONDAY) : (iDay - Calendar.MONDAY) + 7;//得到空白的天数
		System.out.println("<tr>");
		for(int ii = 1; ii <= k; ii++) {
			System.out.print("<td>" + strBlank + "</td>");//得到开头空白	
		}
		int i = 0;
		for (i = 0; i < monthList.length; i++) {
			Date d = monthList[i];			
			String s = format(d, "yyyy-MM-dd E");
			if((i + k + 1) % 7 == 0) {
				System.out.println("<td>" + a(d) + "</td></tr>");
				if(i != monthList.length) {
					System.out.print("<tr>");
				}
			} else {
				System.out.print("<td>" + a(d) + "</td>");
			}
		}
		if((i + k) % 7 != 0) {
			int n = 7 - (i + k) % 7;
			for(int j = 1; j <= n; j++) {
				System.out.print("<td>" + strBlank + "</td>");//得到结尾空白
				if(j == n) {
					System.out.println("</tr>");
				}
			}
		}
		
		System.out.println("</table>");
		
		
		String s = format(new Date(), "yyyy-MM-dd E");
		System.out.println(s);
	}
	
	private static String a(Date d) {
		String s = format(d, "d");
		s += "<BR>";
		s += "22222";
		return s;
	}
}

 

 

2 CalendarUtil  各种辅助

 

 

package com.iwode.common;

import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * 常用日历操作辅助类
 * @author steven 2010-08-10
 * @email:[e-mail]
 */
public class CalendarUtil {

	// 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
	private static Calendar calendar = Calendar.getInstance();//实例化日历

	/**测试
	 * @param args
	 */
	public static void main(String[] args) {
		CalendarUtil tt = new CalendarUtil();
		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:" + tt.getThisSeasonFirstTime(11));
		System.out.println("获取本季度最后一天:" + tt.getThisSeasonFinallyTime(11));
		System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:"
				+ CalendarUtil.getTwoDay("2008-12-1", "2008-9-29"));
		System.out.println("---------------->");
		System.out.println("获取当前月的第几周：" + tt.getWeekOfMonth());
		System.out.println("获取当前年份：" + tt.getYear());
		System.out.println("获取当前月份：" + tt.getMonth());
		System.out.println("获取今天在本年的第几天：" + tt.getDayOfYear());
		
		System.out.println("获得今天在本月的第几天(获得当前日)：" + tt.getDayOfMonth());
		System.out.println("获得今天在本周的第几天：" + tt.getDayOfWeek());
		System.out.println("获得半年后的日期：" + tt.convertDateToString(tt.getTimeYearNext()));
	}

	/**
	 * 获得当前年份
	 * 
	 * @return
	 */
	public static int getYear() {
		return calendar.get(Calendar.YEAR);
	}

	/**
	 * 获得当前月份
	 * 
	 * @return
	 */
	public static int getMonth() {
		return calendar.get(Calendar.MONTH) + 1;
	}

	/**
	 * 获得今天在本年的第几天
	 * 
	 * @return
	 */
	public static int getDayOfYear() {
		return calendar.get(Calendar.DAY_OF_YEAR);
	}

	/**
	 * 获得今天在本月的第几天(获得当前日)
	 * 
	 * @return
	 */
	public static int getDayOfMonth() {
		return calendar.get(Calendar.DAY_OF_MONTH);
	}

	/**
	 * 获得今天在本周的第几天
	 * 
	 * @return
	 */
	public static int getDayOfWeek() {
		return calendar.get(Calendar.DAY_OF_WEEK);
	}

	/**
	 * 获得今天是这个月的第几周
	 * 
	 * @return
	 */
	public static int getWeekOfMonth() {
		return calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH);
	}

	/**
	 * 获得半年后的日期
	 * 
	 * @return
	 */
	public static Date getTimeYearNext() {
		calendar.add(Calendar.DAY_OF_YEAR, 183);
		return calendar.getTime();
	}
	
	public static String convertDateToString(Date dateTime){
		SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
		return df.format(dateTime);
	}
	
	/**
	 * 得到二个日期间的间隔天数
	 */
	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 + "";
	}

	/**
	 * 根据一个日期，返回是星期几的字符串
	 * 
	 * @param sdate
	 * @return
	 */
	public static String getWeek(String sdate) {
		// 再转换为时间
		Date date = CalendarUtil.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());
	}

	/**
	 * 将短时间格式字符串转换为时间 yyyy-MM-dd
	 * 
	 * @param strDate
	 * @return
	 */
	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;
	}

	/**
	 * 两个时间之间的天数
	 * 
	 * @param date1
	 * @param date2
	 * @return
	 */
	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);
		return preYearDay;
	}

	// 获得本季度第一天
	public String getThisSeasonFirstTime(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;
		return seasonDate;

	}

	// 获得本季度最后一天
	public String getThisSeasonFinallyTime(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 + "-" + end_month + "-" + end_days;
		return seasonDate;

	}

	/**
	 * 获取某年某月的最后一天
	 * 
	 * @param year
	 *            年
	 * @param month
	 *            月
	 * @return 最后一天
	 */
	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;
	}

	/**
	 * 是否闰年
	 * 
	 * @param year
	 *            年
	 * @return
	 */
	public boolean isLeapYear(int year) {
		return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
	}
}

 

 

3 输出月末最后1天的数值方法

package com.sysoft.oa.rc.bean;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateTime {
    public static void main(String[] args) throws ParseException {
        DateTime dt = new DateTime();

        Date date = new SimpleDateFormat("yyyy-MM-dd").parse("2008-02-14");
        date = dt.lastDayOfMonth(date);
        System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(date));

        date = new SimpleDateFormat("yyyy-MM-dd").parse("2008-02-14");
        date = dt.lastDayOfMonth2(date);
        System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(date));

        date = new SimpleDateFormat("yyyy-MM-dd").parse("2008-02-14");
        date = dt.lastDayOfMonth3(date);
        System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(date));

        date = new SimpleDateFormat("yyyy-MM-dd").parse("2008-02-14");
        date = dt.lastDayOfMonth4(date);
        System.out.println(new SimpleDateFormat("yyyy-MM-dd").format(date));
    }

    public Date lastDayOfMonth(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.DAY_OF_MONTH, 1);
        cal.roll(Calendar.DAY_OF_MONTH, -1);
        return cal.getTime();
    }

    public Date lastDayOfMonth2(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int value = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
        cal.set(Calendar.DAY_OF_MONTH, value);
        return cal.getTime();
    }

    public Date lastDayOfMonth3(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.DAY_OF_MONTH, 1);
        cal.add(Calendar.MONTH, 1);
        cal.add(Calendar.DATE, -1);
        return cal.getTime();
    }

    public Date lastDayOfMonth4(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        do {
            cal.add(Calendar.DATE, 1);
        } while (cal.get(Calendar.DATE) != 1);
        cal.add(Calendar.DATE, -1);
        return cal.getTime();
    }
}