package com.boying.common.util;
|
|
import java.text.ParseException;
|
import java.text.SimpleDateFormat;
|
import java.util.Calendar;
|
import java.util.Date;
|
import java.util.GregorianCalendar;
|
|
public class DateUtil {
|
|
public static Date stringDateFormat(String strDate, String format) {
|
if (StringUtil.isNullOrEmpty(strDate)) {
|
return null;
|
}
|
SimpleDateFormat sdf = null;
|
if (format == null)
|
sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
|
else
|
sdf = new SimpleDateFormat(format);
|
try {
|
return sdf.parse(strDate);
|
} catch (ParseException e) {
|
return null;
|
}
|
}
|
|
public static String DateToString(Date date,String format){
|
if(!StringUtil.isNullOrEmpty(format)){
|
SimpleDateFormat f = new SimpleDateFormat(format);
|
String sDate = f.format(date);
|
return sDate;
|
}
|
SimpleDateFormat f = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss");
|
String sDate = f.format(date);
|
return sDate;
|
}
|
|
|
public static Date getYearFirst(int year){
|
Calendar calendar = Calendar.getInstance();
|
calendar.clear();
|
calendar.set(Calendar.YEAR, year);
|
Date currYearFirst = calendar.getTime();
|
return currYearFirst;
|
}
|
|
/**
|
* 获取某年最后一天日期
|
* @param year 年份
|
* @return Date
|
*/
|
public static Date getYearLast(int year){
|
Calendar calendar = Calendar.getInstance();
|
calendar.clear();
|
calendar.set(Calendar.YEAR, year);
|
calendar.roll(Calendar.DAY_OF_YEAR, -1);
|
Date currYearLast = calendar.getTime();
|
|
return currYearLast;
|
}
|
|
/**
|
* 获取指定年月的第一天
|
* @param year
|
* @param month
|
* @return
|
*/
|
public static Date getFirstDayOfMonth(int year, int month) {
|
Calendar cal = Calendar.getInstance();
|
//设置年份
|
cal.set(Calendar.YEAR, year);
|
//设置月份
|
cal.set(Calendar.MONTH, month-1);
|
//获取某月最小天数
|
int firstDay = cal.getMinimum(Calendar.DATE);
|
//设置日历中月份的最小天数
|
cal.set(Calendar.DAY_OF_MONTH,firstDay);
|
return cal.getTime();
|
}
|
|
/**
|
* 获取指定年月的最后一天
|
* @param year
|
* @param month
|
* @return
|
*/
|
public static Date getLastDayOfMonth(int year, int month) {
|
Calendar cal = Calendar.getInstance();
|
//设置年份
|
cal.set(Calendar.YEAR, year);
|
//设置月份
|
cal.set(Calendar.MONTH, month-1);
|
//获取某月最大天数
|
int lastDay = cal.getActualMaximum(Calendar.DATE);
|
//设置日历中月份的最大天数
|
cal.set(Calendar.DAY_OF_MONTH, lastDay);
|
return cal.getTime();
|
}
|
|
public static String getFirstTimeByDate() {
|
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
|
Calendar cal = Calendar.getInstance();
|
String start_update = format.format(cal.getTime());
|
cal.set(Calendar.HOUR_OF_DAY, cal.get(Calendar.HOUR_OF_DAY)-1);
|
String end_update = format.format(cal.getTime());
|
return end_update;
|
}
|
|
public static Date getToDayFirstDate() {
|
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
|
Calendar cal = Calendar.getInstance();
|
//String start_update = format.format(cal.getTime());
|
cal.set(Calendar.HOUR_OF_DAY, cal.get(Calendar.HOUR_OF_DAY)-1);
|
//String end_update = format.format(cal.getTime());
|
return cal.getTime();
|
}
|
}
|