日期格式化工具类(DateTimeUtils.java)

Posted 2022-10-31 飞廉灬少将

可以直接用的日期格式化工具类(DateTimeUtil.java)

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

/**
 * 日期格式化工具类
 */
public class DateTimeUtil 

    public static String fmt_ymd = "yyyy-MM-dd";
    public static String fmt_ymdhms = "yyyy-MM-dd HH:mm:ss";

    /**
     * 格式 yyyy年MM月dd日 HH:mm:ss
     *
     * @param dateTime
     * @return
     */
    public static String getDateTimeDisplayString(Date dateTime) 
        DateFormat dtf2 = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
        String strDate2 = dtf2.format(dateTime);

        return strDate2;
    

    /**
     * 格式 yyyy年MM月dd日
     *
     * @param dateTime
     * @return
     */
    public static String getDateTime(Date dateTime) 
        DateFormat dtf2 = new SimpleDateFormat("yyyy年MM月dd日");
        String strDate2 = dtf2.format(dateTime);

        return strDate2;
    

    /**
     * 格式:yyyyMMdd
     *
     * @param dateTime
     * @return
     */
    public static String getFormatDate(Date dateTime)
        DateFormat dft=new SimpleDateFormat("yyyyMMdd");
        String str=dft.format(dateTime);

        return str;
    

    /**
     * 生成时间戳
     *
     * @return
     */
    public static Long calendarDate() 
        Calendar calendar = Calendar.getInstance();
        return calendar.getTimeInMillis();
    

    /**
     * 给指定日期添加 i 月
     *
     * @param currentTime
     * @param month
     * @return
     */
    public static Date addMonths(Date currentTime, Integer month) 
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(currentTime);
        calendar.add(Calendar.MONTH, month);
        return calendar.getTime();
    

    public static Date add(Date currentTime, Integer day) 
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(currentTime);
        calendar.add(Calendar.DATE, day);
        return calendar.getTime();
    

    public static Date add(Date currentTime, Short day) 
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(currentTime);
        calendar.add(Calendar.DATE, day);
        return calendar.getTime();
    

    public static Boolean isAfter(Date resource, Date target) 
        return (resource.getTime() > target.getTime());
    

    public static Boolean isBefore(Date resource, Date target) 
        return (resource.getTime() < target.getTime());
    

    /**
     * 格式化后比较日期大小
     *
     * @param resource
     * @param target
     * @param type     日期格式
     * @return
     */
    public static Boolean isAfter(Date resource, Date target, String type) 
        try 
            DateFormat fmt = new SimpleDateFormat(type);
            resource = fmt.parse(fmt.format(resource));
            target = fmt.parse(fmt.format(target));
            return (resource.getTime() < target.getTime());
         catch (ParseException e) 
            return false;
        
    

    /**
     * 格式化后比较日期大小
     *
     * @param resource
     * @param target
     * @param type     日期格式
     * @return
     */
    public static Boolean isAfterOrEqual(Date resource, Date target, String type) 
        try 
            DateFormat fmt = new SimpleDateFormat(type);
            resource = fmt.parse(fmt.format(resource));
            target = fmt.parse(fmt.format(target));
            return (resource.getTime() <= target.getTime());
         catch (ParseException e) 
            return false;
        
    

    /**
     * 格式化后比较日期大小
     *
     * @param resource
     * @param target
     * @param type     日期格式
     * @return
     */
    public static Boolean isBefore(Date resource, Date target, String type) 
        try 
            DateFormat fmt = new SimpleDateFormat(type);
            resource = fmt.parse(fmt.format(resource));
            target = fmt.parse(fmt.format(target));
            return (resource.getTime() > target.getTime());
         catch (ParseException e) 
            return false;
        
    

    /**
     * 格式:yyyy-MM-dd
     *
     * @param dateTime
     * @return
     */
    public static String getFmt_ymd(Date dateTime) 
        DateFormat dft = new SimpleDateFormat("yyyy-MM-dd");
        String str = dft.format(dateTime);

        return str;
    


    /**
     * 格式化后比较日期大小
     *
     * @param resource
     * @param target
     * @param type     日期格式
     * @return
     */
    public static Boolean isBeforeOrEqual(Date resource, Date target, String type) 
        try 
            DateFormat fmt = new SimpleDateFormat(type);
            resource = fmt.parse(fmt.format(resource));
            target = fmt.parse(fmt.format(target));
            return (resource.getTime() > target.getTime());
         catch (ParseException e) 
            return false;