Calendar常用方法封装

http://www.iteye.com/topic/734028


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java得到指定时间段中的所有周，以及每周的每天都是周一和日期是多少？
http://www.oschina.net/code/snippet_8676_2035

计算日历显示的开始与结束日期，共42天
http://www.oschina.net/code/snippet_2765_2063

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---------------------自己使用的日期--start----------------------

public class TestEveryDate {

private   static   SimpleDateFormat   sdf   =   new   SimpleDateFormat( "yyyy-MM-dd ");
public   static   void   main(String[]   args)   throws   ParseException   {
Date   date   =   sdf.parse( "2011-8-31 ");
Date   date2   =   sdf.parse( "2011-09-20 ");

System.out.println(sdf.format(getFirstMonthDay(date)));
System.out.println(sdf.format(getLastMonthDay(date)));
System.out.println("============================");
List <Date>   list   =   getAllDates(date,   date2);

for(Date d:list)   {
System.out.println(sdf.format(d));
}
}



public   static   Date   getFirstMonthDay(Date   date)   {
Calendar   calendar   =   new   GregorianCalendar();
calendar.setTime(date);
calendar.set(Calendar.DATE,   calendar.getActualMinimum(Calendar.DATE));
return   calendar.getTime();
}

public   static   Date   getLastMonthDay(Date   date)   {
Calendar   calendar   =   new   GregorianCalendar();
calendar.setTime(date);
calendar.set(Calendar.DATE,   calendar.getActualMaximum(Calendar.DATE));
return   calendar.getTime();
}

public   static   List <Date>   getAllDates(Date   start,   Date   end)   {
Calendar   calendar1   =   new   GregorianCalendar();
calendar1.setTime(start);
Calendar   calendar2   =   new   GregorianCalendar();
calendar2.setTime(end);
List <Date>   list   =   new   ArrayList <Date> ();
list.add(start);
while(calendar1.compareTo(calendar2)   <   0)   {
calendar1.add(Calendar.DATE,   1);
list.add(calendar1.getTime());
}
return   list;
}
}


-------------------自己使用的日期end----------------------------


这些天，在忙于“采购提醒”，它是一个循环式的工作机制，周期有四类，周，月，季，半年。平时对Calendar关注相对少些，所以做起来到处找资料，现在对Calendar封装一下，方便大家更快，更好的进入正题，不用再关注一些费力不讨好的事了，声明先，里面的一些方法是直接借鉴其他同人，只希望大家少走弯路，少留点汗！大家也可以勇跃将自己认为比较好的操作日期方法贴在上面哦
Java代码 
<pre name="code" class="java">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 { 
 
    private int weeks = 0;// 用来全局控制 上一周，本周，下一周的周数变化 
    private int MaxDate; // 一月最大天数 
    private int MaxYear; // 一年最大天数 
 
    /**
     * 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("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.getInstance().get(Calendar.YEAR); 
    } 
 
    /**
     * 获得当前月份
     * 
     * @return
     */ 
    public static int getMonth() { 
        return Calendar.getInstance().get(Calendar.MONTH) + 1; 
    } 
 
    /**
     * 获得今天在本年的第几天
     * 
     * @return
     */ 
    public static int getDayOfYear() { 
        return Calendar.getInstance().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.getInstance().get(Calendar.DAY_OF_MONTH); 
    } 
 
    /**
     * 获得今天在本周的第几天
     * 
     * @return
     */ 
    public static int getDayOfWeek() { 
        return Calendar.getInstance().get(Calendar.DAY_OF_WEEK); 
    } 
 
    /**
     * 获得今天是这个月的第几周
     * 
     * @return
     */ 
    public static int getWeekOfMonth() { 
        return Calendar.getInstance().get(Calendar.DAY_OF_WEEK_IN_MONTH); 
    } 
 
    /**
     * 获得半年后的日期
     * 
     * @return
     */ 
    public static Date getTimeYearNext() { 
        Calendar.getInstance().add(Calendar.DAY_OF_YEAR, 183); 
        return Calendar.getInstance().getTime(); 
    } 
 
    /**
     * 将日期转换成字符串
     * 
     * @param dateTime
     * @return
     */ 
    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
     * 
     * @param sj1
     * @param sj2
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @param dateformat
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @return
     */ 
    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
     * 
     * @param month
     * @return
     */ 
    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
     * 
     * @param month
     * @return
     */ 
    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); 
    } 
 
    /**
     * 是否闰年
     * 
     * @param year
     * @return
     */ 
    public boolean isLeapYear2(int year) { 
        return new GregorianCalendar().isLeapYear(year); 
    } 
} 
</pre>