wlcb-system-task/src/main/java/cn/com/tenlion/systemtask/utils/DateUtils.java

package cn.com.tenlion.systemtask.utils;

/**
 * Calendar操作Date
 *
 * @author renpc
 */

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


public class DateUtils {

    /**设置初始值*/
    private static Calendar cal;
    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

    /**
     * 根据当前系统时区定义Calendar
     */
    static {
        cal = Calendar.getInstance();
    }

    /**
     * 比较两个日期是否相等
     * @param startDate
     * @param endDate
     * @return
     */
    public static boolean DateEqual(Date startDate, Date endDate) {
        String startTime = sdf.format(startDate);
        String endTime = sdf.format(endDate);
        if(startTime.equals(endTime)) {
            return true;
        }else {
            return false;
        }
    }

    /**
     * 获取date的月份的时间范围
     * @param date
     * @return
     */
    public static DateRange getMonthRange(Date date) {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.setTime(date);
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMaxTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.setTime(date);
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 根据指定日期获取当前属于第几个季度
     * @param date
     */
    public static int getNowQuarter(Date date) {
        cal.setTime(date);
        int month = cal.get(Calendar.MONTH) + 1;
        int quarter = 0;
        //判断季度
        if (month >= 1 && month <= 3) {
            quarter = 1;
        } else if (month >= 4 && month <= 6) {
            quarter = 2;
        } else if (month >= 7 && month <= 9) {
            quarter = 3;
        } else {
            quarter = 4;
        }
        return quarter;
    }

    /**
     * 获取当前季度的时间范围
     * @return current quarter
     */
    public static DateRange returnQuarterCurrent(int year, int quarter) {
        Calendar startCalendar = Calendar.getInstance();
        Calendar endCalendar = Calendar.getInstance();
        if (quarter == 1) {
            startCalendar.set(year, 1 - 1, 1, 00, 00, 00);
            endCalendar.set(year, 3 - 1, 31, 23, 59, 59);
        } else if (quarter == 2) {
            startCalendar.set(year, 4 - 1, 1, 00, 00, 00);
            endCalendar.set(year, 6 - 1, 30, 23, 59, 59);
        } else if (quarter == 3) {
            startCalendar.set(year, 7 - 1, 1, 00, 00, 00);
            endCalendar.set(year, 9 - 1, 30, 23, 59, 59);
        } else {
            startCalendar.set(year, 10 - 1, 1, 00, 00, 00);
            endCalendar.set(year, 12 - 1, 31, 23, 59, 59);
        }
        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取当前季度的时间范围
     * @return current quarter
     */
    public static DateRange getThisQuarter(int quarter) {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3) * 3);
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3) * 3 + 2);
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取昨天的时间范围
     * @return
     */
    public static DateRange getYesterdayRange() {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.add(Calendar.DAY_OF_MONTH, -1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.add(Calendar.DAY_OF_MONTH, -1);
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取当前月份的时间范围
     * @return
     */
    public static DateRange getThisMonth() {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取上个月的时间范围
     * @return
     */
    public static DateRange getLastMonth() {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.add(Calendar.MONTH, -1);
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.add(Calendar.MONTH, -1);
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取指定当前年份月的时间范围
     * month:-1是前一个月,-2是前二个月。+1是推后一个月。以此类推
     * @return
     */
    public static DateRange getAppointMonth(int month) {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.add(Calendar.MONTH, month);
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.add(Calendar.MONTH, month);
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * 获取上个季度的时间范围
     * @return
     */
    public static DateRange getLastQuarter() {
        Calendar startCalendar = Calendar.getInstance();
        startCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3 - 1) * 3);
        startCalendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(startCalendar);

        Calendar endCalendar = Calendar.getInstance();
        endCalendar.set(Calendar.MONTH, ((int) endCalendar.get(Calendar.MONTH) / 3 - 1) * 3 + 2);
        endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(endCalendar);

        return new DateRange(startCalendar.getTime(), endCalendar.getTime());
    }

    /**
     * @param date1 需要比较的时间 不能为空(null),需要正确的日期格式
     * @param date2 被比较的时间  为空(null)则为当前时间
     * @param stype 返回值类型   0为多少天，1为多少个月，2为多少年
     * @return
     */
    public static int compareDate(String date1, String date2, int stype) {
        int n = 0;

        String[] u = {"天", "月", "年"};
        String formatStyle = stype == 1 ? "yyyy-MM" : "yyyy-MM-dd";

        date2 = date2 == null ? DateUtils.getCurrentDate() : date2;

        DateFormat df = new SimpleDateFormat(formatStyle);
        Calendar c1 = Calendar.getInstance();
        Calendar c2 = Calendar.getInstance();
        try {
            c1.setTime(df.parse(date1));
            c2.setTime(df.parse(date2));
        } catch (Exception e3) {
            System.out.println("wrong occured");
        }
        // 循环对比，直到相等，n 就是所要的结果
        while (!c1.after(c2)) {
            n++;
            if (stype == 1) {
                // 比较月份，月份+1
                c1.add(Calendar.MONTH, 1);
            } else {
                // 比较天数，日期+1
                c1.add(Calendar.DATE, 1);
            }
        }

        n = n - 1;

        if (stype == 2) {
            n = (int) n / 365;
        }

        System.out.println(date1 + " -- " + date2 + " 相差多少" + u[stype] + ":" + n);
        return n;
    }

    /**
     * 得到当前日期
     * @return
     */
    public static String getCurrentDate() {
        Calendar c = Calendar.getInstance();
        Date date = c.getTime();
        SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd");
        return simple.format(date);
    }

    private static void setMinTime(Calendar calendar) {
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
    }

    private static void setMaxTime(Calendar calendar) {
        calendar.set(Calendar.HOUR_OF_DAY, calendar.getActualMaximum(Calendar.HOUR_OF_DAY));
        calendar.set(Calendar.MINUTE, calendar.getActualMaximum(Calendar.MINUTE));
        calendar.set(Calendar.SECOND, calendar.getActualMaximum(Calendar.SECOND));
        calendar.set(Calendar.MILLISECOND, calendar.getActualMaximum(Calendar.MILLISECOND));
    }


    public final static String DEFAULT_PATTERN = "MM/dd/yyyy HH:mm:ss";

    public static String format(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
        return sdf.format(date);
    }

    public static void main(String[] args) {
        int dateNum = 10;
        int monthTime = 10;
        int yearTime = 2020;
        String xAxisValue = "";
        int j = 0;
        for(int i=1;i<=dateNum;i++) {
            if (monthTime > 12) {
                yearTime += 1;
                monthTime = 1;
            }
            xAxisValue += yearTime + "年-" + monthTime + "月" + ",";
            monthTime++;
        }
        System.out.println(xAxisValue);
    }
}