别人那搞过来date工具mark一下

package com.example.datepicker;

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

public class MYdate extends Date {

private static DateFormat dateTimeF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

public static String getDateTimeString(Date date) {
if (date == null) return "";
return dateTimeF.format(date);
}

public static Date getDateFromDateTimeString(String dateTimeString) {
try {
return dateTimeF.parse(dateTimeString);
} catch (ParseException e) {
return null;
}
}

public static DateFormat dateShortTimeF = new SimpleDateFormat("yyyy-MM-dd HH:mm");

public static String getDateShortTimeString(Date date) {
if (date == null) return "";
return dateShortTimeF.format(date);
}

public static Date getDateFromDateShortTimeString(String dateShortTimeString) {
try {

4000
return dateShortTimeF.parse(dateShortTimeString);
} catch (ParseException e) {
return null;
}
}

public static DateFormat dateE = new SimpleDateFormat("yyyy-MM");

public static String getYearAndMonthString(Date date) {
if (date == null) return "";
return dateE.format(date);
}

public static DateFormat dateF = new SimpleDateFormat("yyyy-MM-dd");

public static String getDateString(Date date) {
if (date == null) return "";
return dateF.format(date);
}

public static Date getDateFromDateString(String dateString) {
try {
return dateF.parse(dateString);
} catch (ParseException e) {
return null;
}
}

private static DateFormat shortDateTimeF = new SimpleDateFormat("MM-dd HH:mm");

public static String getShortDateTimeString(Date date) {
if (date == null) return "";
return shortDateTimeF.format(date);
}

private static DateFormat shortDateF = new SimpleDateFormat("MM-dd");

public static String getShortDateString(Date date) {
if (date == null) return "";
return shortDateF.format(date);
}

public static DateFormat shortTimeF = new SimpleDateFormat("HH:mm");

public static String getShortTimeString(Date date) {
if (date == null) return "";
return shortTimeF.format(date);
}

private static Calendar calendar = Calendar.getInstance();

public static Date addDayFromDate(Date date, int day) {
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_YEAR, day);
return calendar.getTime();
}

//返回大写日期
public static String getUpperDateTimeString(Date date) {
calendar.setTime(date);

return LYDate.toUpperNumber(String.valueOf(calendar.get(Calendar.HOUR_OF_DAY))) + "时"
+ LYDate.toUpperNumber(String.valueOf(calendar.get(Calendar.MINUTE))) + "分";
}

public static String toUpperNumber(String dateString) {
//        if (CommonHelper.isNullOrBlank(dateString)) {
//            return "";
//        }
if (dateString.length() == 1) {
dateString = "0" + dateString;
}

String string = null;
String firNumStr = dateString.substring(0, 1);
String secNumStr = dateString.substring(1, 2);
int firNum = Integer.valueOf(firNumStr);
int secNum = Integer.valueOf(secNumStr);
String[] numArray = new String[]{"零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十"};
if (firNum == 0) {
string = numArray[secNum];
} else if (firNum == 1) {
if (secNum == 0) {
string = numArray[10];
} else {
string = numArray[10] + numArray[secNum];
}
} else {
if (secNum == 0) {
string = numArray[firNum] + numArray[10];
} else {
string = numArray[firNum] + numArray[10] + numArray[secNum];
}
}
return string;
}

/**
* 当月第一天
*
* @return
*/
public static String getFirstDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
Date theDate = calendar.getTime();

GregorianCalendar gcLast = (GregorianCalendar) Calendar.getInstance();
gcLast.setTime(theDate);
gcLast.set(Calendar.DAY_OF_MONTH, 1);
String day_first = dateF.format(gcLast.getTime());
StringBuffer str = new StringBuffer().append(day_first).append(" 00:00:00");
return str.toString();

}

/**
* 当月最后一天
*
* @return
*/
public static String getLastDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MONTH, 1);
calendar.add(Calendar.DATE, -1);
Date theDate = calendar.getTime();
String s = dateF.format(theDate);
StringBuffer str = new StringBuffer().append(s).append(" 23:59:59");
return str.toString();

}

//加天数
public static Date addDay(Date date, int day) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DATE, day);
Date theDate = calendar.getTime();
return theDate;
}

public static Date addMinute(String time, int minute) {
Date date = getDateFromDateTimeString(time);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MINUTE, (0 - minute));
Date theDate = calendar.getTime();
return theDate;
}

}