java对时间处理工具类

Java对时间处理相关工具类

本文章主要对日期时间的计算的一些处理，本人整理出了工具类，需要使用的时候直接拿来使用即可。

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

/**
 * @Auther: qiuhongyu
 * @Date: 2021/08/05/9:55
 */
public class DateUtil {

    /**
     * 今天
     *
     * @param format
     * @return
     */
    public static String today(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Date today = new Date();
        return sd.format(today);
    }

    /**
     * 昨天
     *
     * @param format
     * @return
     */
    public static String yesterday(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.DATE, GlobalConstants.PAST_ONE_DATE);
        Date d = c.getTime();
        return sd.format(d);
    }

    /**
     * 一周内（即过去七天）
     *
     * @param format
     * @return
     */
    public static String pastOneWeek(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.DATE, GlobalConstants.PAST_SIX_DATE);
        Date d = c.getTime();
        return sd.format(d);
    }

    /**
     * 一个月内
     *
     * @param format
     * @return
     */
    public static String pastOneMonth(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, GlobalConstants.PAST_ONE_MONTH);
        return sd.format(c.getTime());
    }


    /**
     * 半年内
     *
     * @param format
     * @return
     */
    public static String pastHalfYear(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, GlobalConstants.PAST_HALF_YEAR);
        return sd.format(c.getTime());
    }

    /**
     * 一年内
     *
     * @param format
     * @return
     */
    public static String pastYear(String format) {
        SimpleDateFormat sd = new SimpleDateFormat(format);
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, GlobalConstants.PAST_ONE_YEAR);
        return sd.format(c.getTime());
    }

}

全局常量类。

/**
 * @Auther: qiuhongyu
 * @Date: 2021/08/05/9:29
 */
public class GlobalConstants {

    public static final int ALL = 1;

    public static final int TODAY = 2;

    public static final int YESTERDAY = 3;

    public static final int ONE_WEEK = 4;

    public static final int ONE_MONTH = 5;

    public static final int HALF_ONE_YEAR = 6;

    public static final int ONE_YEAR = 7;

    public static String TIME_FORMAT = "yyyy-MM-dd";

    public static final int PAST_ONE_DATE = -1;

    public static final int PAST_SIX_DATE = -6;

    public static final int PAST_ONE_MONTH = -1;

    public static final int PAST_HALF_YEAR = -6;

    public static final int PAST_ONE_YEAR = -12;


}