import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* 获取当前的日期格式为:yyyy-MM-dd HH:mm:ss
*
* @author Arthur(user_006)
* @version 1.0.0 2010/04/24 14:00(星期六)
*/
public class TimerUtil {
/**
* 获取当前的日期 , 默认格式
*
* @return 当前的日期
*/
public synchronized static Date getCurrentCalendar() {
Calendar calendar = Calendar.getInstance();
return calendar.getTime();
}
/**
* 获取当前日期 , 格式yyyy-MM-dd , 如: 2010-04-24
*
* @return
*/
public synchronized static String getCurrentDate() {
Calendar calendar = Calendar.getInstance();
StringBuffer sb = new StringBuffer();
sb.append(calendar.get(Calendar.YEAR)).append("-");
sb.append(calendar.get(Calendar.MONTH) + 1).append("-");
sb.append(calendar.get(Calendar.DAY_OF_MONTH));
return sb.toString();
}
/**
* 把字符形式的日期转换成Date类型 , 格式yyyy-MM-DD
*
* @param date
* 日期的字符串形式
*
* @return Data类型的日期
*/
public synchronized static Date convertToDate(String date) {
DateFormat format = new SimpleDateFormat("yyyy-MM-DD");
try {
return format.parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/**
* 把日期转换为指定的格式
*
* @param date
* 要转换的日期
* @param pattern
* 转换的格式
* @return
*/
public synchronized static Date format(Date date, String pattern) {
if (pattern != null && pattern.trim().length() > 0) {
DateFormat format = new SimpleDateFormat(pattern);
String stringDate = format.format(date);
return TimerUtil.convertToDate(stringDate);
}
return null;
}
/**
* 将日期转换为字符串 , 格式yyyy-MM-dd HH:mm:ss
*
* @param date
* 要转换的日期
* @return
*/
public synchronized static String convertToString(Date date) {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return format.format(date);
}
/**
* 将日期转换为字符串 , 格式yyyy-MM-dd HH:mm:ss
*
* @param date
* 要转换的日期
* @return
*/
public synchronized static String convertToStrShort(Date date) {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
return format.format(date);
}
/**
* 将日期转换为字符串 , 格式yyyyMMddHHmmss
*
* @param date
* 要转换的日期
* @return
*/
public synchronized static String convertToString2(Date date) {
DateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
return format.format(date);
}
/**
* 将日期转换为指定格式的字符串
*
* @param date
* 要转换的日期
* @param formatText
* 转换的格式
* @return
*/
public synchronized static String convertToString(Date date,
String formatText) {
DateFormat format = new SimpleDateFormat(formatText);
Calendar calendar = Calendar.getInstance();
StringBuffer sb = new StringBuffer();
sb.append(calendar.get(Calendar.YEAR)).append("-");
sb.append(calendar.get(Calendar.MONTH) + 1).append("-");
sb.append(calendar.get(Calendar.DAY_OF_MONTH));
return format.format(date);
}
/**
* 获取本周一的日期
*
* @return
*/
public synchronized static Date getMondayOFWeek() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);// 这里设置从周一開始,若须要依据系统时区自己主动获取，则採用下边的方式
return calendar.getTime();
}
/**
* 获取本周日日期
*
* @return
*/
public synchronized static Date getCurrentWeekday() {
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, getCurrentPlus());// 把当前日期的DATE加上当前日期与本周日之间相差的天数
return calendar.getTime();
}
/**
* 获取上周日的日期
*
* @return
*/
public synchronized static Date getPreviousWeekday() {
Calendar calendar = Calendar.getInstance();
// calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY+7);
calendar.add(Calendar.DATE, getCurrentPlus() - 7);// 把当前日期的DATE加上当前日期与本周日之间相差的天数
return calendar.getTime();
}
/**
* 获取上周日的日期
*
* @return
*/
public synchronized static Date getPreviousMonday() {
Calendar calendar = Calendar.getInstance();
// calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY+7);
calendar.add(Calendar.DATE, getCurrentPlus() - 13);// 把当前日期的DATE加上当前日期与本周日之间相差的天数
return calendar.getTime();
}
/**
* 获取上周日的日期
*
* @return
*/
public synchronized static Date getNextWeekday() {
Calendar calendar = Calendar.getInstance();
// calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY+7);
calendar.add(Calendar.DATE, getCurrentPlus() + 1 + 6);// 把当前日期的DATE加上当前日期与本周日之间相差的天数
return calendar.getTime();
}
/**
* 获取上周日的日期
*
* @return
*/
public synchronized static Date getNextMonday() {
Calendar calendar = Calendar.getInstance();
// calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY+7);
calendar.add(Calendar.DATE, getCurrentPlus() + 1);// 把当前日期的DATE加上当前日期与本周日之间相差的天数
return calendar.getTime();
}
/**
* 获取当前日期与本周周日之间相差的天数
*
* @return
*/
public synchronized static int getCurrentPlus() {
Calendar calendar = Calendar.getInstance();
int days = calendar.get(Calendar.DAY_OF_WEEK) - 1;// 在中国是已星期一作为一周的第一天,所以这里减1
return 7 - days;
}
public synchronized static int getCurrentYear() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.YEAR);
}
/**
* 返回指定日期的当月第一天
*
* @param date
* @return
*/
@SuppressWarnings("static-access")
public synchronized static Date getFirstDayInMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(calendar.DATE, 1);
return calendar.getTime();
}
/**
* 返回指定日期的当月最后一天
*
* @param date
* @return
*/
@SuppressWarnings("static-access")
public synchronized static Date getLastDayInMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(calendar.MONTH, 1);
calendar.set(calendar.DATE, 1);
calendar.add(calendar.DATE, -1);
return calendar.getTime();
}
/*
* 计算两个日期之间的天数
*/
public static int getDaysBetween(Calendar d1, Calendar d2) {
if (d1.after(d2)) {
java.util.Calendar swap = d1;
d1 = d2;
d2 = swap;
}
int days = d2.get(Calendar.DAY_OF_YEAR) - d1.get(Calendar.DAY_OF_YEAR);
int y2 = d2.get(Calendar.YEAR);
if (d1.get(Calendar.YEAR) != y2) {
d1 = (Calendar) d1.clone();
do {
days += d1.getActualMaximum(Calendar.DAY_OF_YEAR);// 得到当年的实际天数
d1.add(Calendar.YEAR, 1);
} while (d1.get(Calendar.YEAR) != y2);
}
return days;
}
/*
* 计算两个日期之间的时间
*/
public static String getGapTime(Date createTime) {
// TODO Auto-generated method stub
Calendar d2 = Calendar.getInstance();
Calendar d1 = Calendar.getInstance();
d1.setTime(createTime);
int days = d2.get(Calendar.DAY_OF_YEAR) - d1.get(Calendar.DAY_OF_YEAR);
if (days < 1) {
int hour = d2.get(Calendar.HOUR_OF_DAY)
- d1.get(Calendar.HOUR_OF_DAY);
if (hour < 1) {
int munites = d2.get(Calendar.MINUTE) - d1.get(Calendar.MINUTE);
if (munites == 0) {
return "刚刚";
} else {
return munites + "分钟前";
}
} else {
return hour + "小时前";
}
} else {
return days + "天前";
}
}
//加天数
public static String addDays(int day){
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, day);
StringBuffer sb = new StringBuffer();
sb.append(calendar.get(Calendar.YEAR)).append("-");
sb.append(calendar.get(Calendar.MONTH) + 1).append("-");
sb.append(calendar.get(Calendar.DAY_OF_MONTH));
return sb.toString();
}
//加年份
public static String addYears(String now, int year) throws ParseException{
Calendar fromCal=Calendar.getInstance();
DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
Date date=dateFormat.parse(now);
fromCal.setTime(date);
fromCal.add(Calendar.YEAR, year);
return dateFormat.format(fromCal.getTime());
}
//加天数(特定时间)
public static String addDate(String now, int day) throws ParseException{
Calendar fromCal=Calendar.getInstance();
DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
Date date=dateFormat.parse(now);
fromCal.setTime(date);
fromCal.add(Calendar.DATE, day);
return dateFormat.format(fromCal.getTime());
}
/**
* 格多少时间
* @throws ParseException
*/
@SuppressWarnings("deprecation")
public static void main(String[] args) throws ParseException {
System.out.println(TimerUtil.addYears("2008-12-01",7));
}
/*public static void main(String[] args) {
String createDate = "2008-12-01";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");
try {
Date date = sdf.parse(createDate);
Calendar cl = Calendar.getInstance();
cl.setTime(date);
cl.add(Calendar.DATE,31);
String temp = "";
temp = sdf.format(cl.getTime());
System.out.println(temp);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}*/
}