日历封装类

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
  


  
    
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      讲义_2010_08_21
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      吃妖精_
    
  
  
    
      2010-08-11 20:59
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