net.abc.tool.util.date.DateUtil Maven / Gradle / Ivy

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package net.abc.tool.util.date;

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

/**
 * @author: zhangwei
 * @date: 11:29/2019-01-05
 */
public class DateUtil {

    private static Calendar getCalendar() {
        return Calendar.getInstance();
    }

    /**
     * 修改日期
     * @param date
     * @param offset
     * @return
     */
    public static Date addDay(Date date, int offset){
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(5, offset);
        return calendar.getTime();
    }


    /**
     * 时分秒格式化成 0
     * @param date
     * @return
     */
    public static Date truncDay(Date date){
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(14, 0);
        calendar.set(13, 0);
        calendar.set(12, 0);
        calendar.set(11, 0);
        return calendar.getTime();
    }

    public static Date truncTime(Date date, ETimeUnit unit){
        Calendar cal = getCalendar();
        cal.setTime(date);
        switch(unit) {
            case WEEK:
                cal.set(7, 2);
                break;
            case MONTH:
                cal.set(5, 1);
                break;
            case SEASON:
                int month = cal.get(2);
                boolean var6;
                if (month < 3) {
                    var6 = false;
                } else if (month < 6) {
                    var6 = true;
                } else if (month < 9) {
                    var6 = true;
                } else {
                    var6 = true;
                }

                cal.set(5, 1);
                break;
            case YEAR:
                cal.set(2, 0);
                cal.set(5, 1);
        }

        cal.set(11, 0);
        cal.set(12, 0);
        cal.set(13, 0);
        cal.set(14, 0);
        return cal.getTime();
    }

    public static Date addDate(Date date, ETimeUnit unit, int offset) {
        Calendar cal = getCalendar();
        cal.setTime(date);
        switch (unit) {
            case DAY:
                cal.add(5, offset);
                break;
            case WEEK:
                cal.add(3, offset);
                break;
            case TENDAYS:
                cal.add(5, offset * 10);
                break;
            case MONTH:
                cal.add(2, offset);
                break;
            case SEASON:
                cal.add(2, offset * 4);
                break;
            case YEAR:
                cal.add(1, offset);
        }

        return cal.getTime();
    }



    /**
     * 将时间格式化成指定格式的字符串
     * @param date
     * @param pattern
     * @return
     */
    public static String format(Date date, String pattern){
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        return format.format(date);
    }

    /**
     * 将字符串解析成时间
     * @param source
     * @return
     * @throws ParseException
     */
    public static Date parse(String source) throws ParseException {
        SimpleDateFormat format = new SimpleDateFormat();
        return format.parse(source);
    }
}