Calender常用封装方法

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J2SE
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:qing.tan@iwode.com 
 */  
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);  
    }  
}
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