human-resources-server/src/main/java/com/jingcheng/cms/util/DateUtils.java

package com.jingcheng.cms.util;

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

/**
 * @author
 * @description
 * @create 2018-07-05 13:36
 **/


public class DateUtils {


    public static Date date() {

        return Calendar.getInstance().getTime();
    }


    public static String startTime() {

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MONTH, 3);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return dateFormat.format(calendar.getTime());
    }

    public static String startTimeStamp() {

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MONTH, 3);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        String timeStampStr = String.valueOf(calendar.getTimeInMillis());
        return timeStampStr.substring(0, timeStampStr.length() - 3);
    }

    public static String endTime() {

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 30);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MONTH, 3);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return dateFormat.format(calendar.getTime());
    }

    public static String endTimeStamp() {

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 30);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MONTH, 3);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);

        String timeStampStr = String.valueOf(calendar.getTimeInMillis());

        return timeStampStr.substring(0, timeStampStr.length() - 3);
    }

    public static String timeStampToStr(String timeStampStr) {


        Long timeStamp = Long.parseLong(timeStampStr);
        timeStamp = timeStamp * 1000L;
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(timeStamp);
        return formatDate(calendar.getTime());
    }

    public static String formatDate(Date date) {


        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return dateFormat.format(date);
    }

    public static String curDateTimeString() {

        Date date = Calendar.getInstance().getTime();
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return df.format(date);
    }

    public static Date curDateTime() {

        return Calendar.getInstance().getTime();
    }

    public static void main(String[] args) {


        System.out.println(DateUtils.startTime());
        System.out.println(DateUtils.startTimeStamp());
        System.out.println(DateUtils.endTimeStamp());
        System.out.println(DateUtils.endTime());
    }

}