时间转换～

     package com.cloud.assessment.until;
     import org.springframework.stereotype.Component;
     import java.text.DateFormat;
     import java.text.ParseException;
     import java.text.SimpleDateFormat;
     import java.time.LocalDate;
     import java.util.Calendar;
     import java.util.Date;

       /**
           * @Author: jj
         * @Date: 2019/1/17 2:37 PM
         */
        @Component
       public class TimeUntil {
       /**
        * 获取昨天开始的时间
        *
        * @return
       */
       public Date getYesterDayTime() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        calendar.set(Calendar.MILLISECOND, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        calendar.set(Calendar.HOUR_OF_DAY, -24);
        return calendar.getTime();
       }

    /**
     * 获取明天开始时间
     *
     * @return
     */
    public Date getTomorrowStartTime() {
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        cal.add(Calendar.DATE, 1);
        cal.set(Calendar.HOUR_OF_DAY, 0);//这里面要选Calendar.HOUR_OF_DAY，不然会有问题 
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 时间转换格式
     *
     * @return
     */
    public Date getDayStringTime(String time) {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            return format.parse(time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;

    }

    /**
     * 时间转换格式
     *
     * @return
     */
    public Date getDayStringTime2(String time) {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        try {
            return format.parse(time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;

    }

    /**
     * 今天最后一秒
     *
     * @return
     */
    public Date getDayEndTime(Date date) {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date d = null;
        if (date != null) {
            d = date;
        } else {
            d = new Date();
        }
        String str = format.format(d);
        str = str + " 23:59:59";
        return getDayStringTime(str);
    }

    /**
     * 今天开始时间
     *
     * @return
     */
    public Date getDayStartTime() {
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date d = new Date();
        String str = format.format(d);
        str = str + " 00:00:00";
        return getDayStringTime(str);
    }

    /**
     * 是否是周一
     *
     * @return
     */
    public boolean dayIsMONDAY() {
        Date date = new Date();
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
            return Boolean.TRUE;
        }
        return Boolean.FALSE;
    }

    /**
     * 是否是月初第一天
     *
     * @return
     */
    public boolean dayIsMonthFirst() {
        Calendar calendar = Calendar.getInstance();
        Date date = new Date();
        calendar.setTime(date);
        int day = calendar.get(Calendar.DATE);
        if (day == 1) {
            return Boolean.TRUE;
        }
        return Boolean.FALSE;
    }

    /**
     * 是否是季度第一天
     *
     * @return
     */
    public boolean dayIsQuarterFirst() {
        Calendar calendar = Calendar.getInstance();
        Date date = new Date();
        calendar.setTime(date);
        int month = calendar.get(Calendar.MONTH) + 1;//获取月份
        int day = calendar.get(Calendar.DATE);
        if (day == 1) {
            if (month == 1 || month == 4 || month == 7 || month == 10) {

                return Boolean.TRUE;
            }

        }
        return Boolean.FALSE;
    }

    /**
     * 是否是年的第一天
     *
     * @return
     */
    public boolean dayIsYearFirst() {
        Calendar calendar = Calendar.getInstance();
        Date date = new Date();
        calendar.setTime(date);
        int month = calendar.get(Calendar.MONTH) + 1;//获取月份
        int day = calendar.get(Calendar.DATE);
        if (day == 1) {
            if (month == 1) {
                return Boolean.TRUE;
            }
        }

        return Boolean.FALSE;
    }


    /**
     * 获取这周第一天
     *
     * @return
     */
    public Date getWeekStartTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        if (cal.get(Calendar.DAY_OF_WEEK) == 1) {//周末
            cal.add(Calendar.DATE, -6);
            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);
            System.out.println(cal.getTime());
        } else {
            cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);
            System.out.println(cal.getTime());
        }
        return cal.getTime();
    }

    /**
     * 获取这周最后一天
     *
     * @return
     */
    public Date getWeekEndTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        //1表示周末！！
        if (cal.get(Calendar.DAY_OF_WEEK) == 1) {
            return getDayEndTime(date);
        } else {
            cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            cal.add(Calendar.DATE, 7);
            cal.set(Calendar.HOUR_OF_DAY, 23);
            cal.set(Calendar.MINUTE, 59);
            cal.set(Calendar.SECOND, 59);
            cal.set(Calendar.MILLISECOND, 0);
        }
        return cal.getTime();
    }


    /**
     * 获取本月第一天
     *
     * @return
     */
    public Date getMonthStartTime(Date date) {

        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.set(Calendar.DAY_OF_MONTH, 1);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获取本月最后一天
     *
     * @return
     */
    public Date getMonthEndTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获取本季度第一天
     *
     * @return
     */
    public Date getQuarterStartTime(Date date) {

        Calendar calendar = Calendar.getInstance();//日历对象
        if (date != null) {
            calendar.setTime(date);//设置当前日期
        }
        String endString = " 00:00:00";
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        int month = calendar.get(Calendar.MONTH) + 1;//获取月份
        String message = null;
        try {
            if (month < 4) {
                message = calendar.get(Calendar.YEAR) + "-01-01" + endString;
            } else if (month > 3 && month < 7) {
                message = calendar.get(Calendar.YEAR) + "-04-01" + endString;

            } else if (month > 7 && month < 10) {
                message = calendar.get(Calendar.YEAR) + "-07-01" + endString;

            } else {
                message = calendar.get(Calendar.YEAR) + "-10-01" + endString;
            }
            return format.parse(message);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 获取本季度最后一天
     *
     * @return
     */
    public Date getQuarterEndTime(Date date) {
        Calendar calendar = Calendar.getInstance();//日历对象
        if (date != null) {
            calendar.setTime(date);//设置当前日期
        }
        String endString = " 23:59:59";
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        int month = calendar.get(Calendar.MONTH) + 1;//获取月份
        String message = null;
        try {
            if (month < 4) {
                message = calendar.get(Calendar.YEAR) + "-3-31" + endString;
            } else if (month > 3 && month < 7) {
                message = calendar.get(Calendar.YEAR) + "-6-30" + endString;

            } else if (month > 7 && month < 10) {
                message = calendar.get(Calendar.YEAR) + "-9-30" + endString;

            } else {
                message = calendar.get(Calendar.YEAR) + "-12-30" + endString;
            }
            return format.parse(message);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;

    }

    /**
     * 获取本年度第一天
     *
     * @return
     */
    public Date getYearStartTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.set(Calendar.DAY_OF_YEAR, 1);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获取本年度最后一天
     *
     * @return
     */
    public Date getYearEndTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.set(Calendar.DAY_OF_YEAR, cal.getActualMaximum(Calendar.DAY_OF_YEAR));
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    /**
     * 获取半年的最后一天
     *
     * @return
     */
    public Date getYearHalfEndTime(Date date) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH) + 1;//获取月份
        String endTime = "";
        if (month <= 6) {
            endTime = year + "-06-30  23:59:59";
        } else {
            endTime = year + "-12-31  23:59:59";
        }
        return getDayStringTime(endTime);
    }

    /**
     * 获取半年的第一天
     *
     * @return
     */
    public Date getYearHalfStartTime(Date date) {

        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH) + 1;//获取月份
        String endTime = "";
        if (month <= 6) {
            endTime = year + "-01-01  00:00:00";
        } else {
            endTime = year + "-07-01  00:00:00";
        }
        return getDayStringTime(endTime);
    }


}