Java的date日期处理自定义工具类DateUtils
/**
* 获取系统时间并以yyyy-MM-dd格式返回
*
* @return
*/
public static String getCurDate() {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = new SimpleDateFormat("yyyy-MM-dd");
String strDate = simpledateformat.format(calendar.getTime());
return strDate;
}
/**
* 判断字符串是否为yyyy-MM-dd HH:mm:ss格式
*
* @param str
* @return
*/
public static boolean isValidDate(String str) {
boolean convertSuccess = true;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
format.setLenient(false);
format.parse(str);
} catch (ParseException e) {
// e.printStackTrace();
// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
convertSuccess = false;
}
return convertSuccess;
}
/**
* 返回当前日期时间字符串<br>
* 默认格式:yyyy-mm-dd hh:mm:ss
*
* @return String 返回当前字符串型日期时间
*/
public static String getCurrentTime() {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
returnStr = f.format(date);
return returnStr;
}
/**
* 返回当前日期时间字符串<br>
* 默认格式:yyyymmddhhmmss
*
* @return String 返回当前字符串型日期时间
*/
public static BigDecimal getCurrentTimeAsNumber() {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat("yyyyMMddHHmmss");
Date date = new Date();
returnStr = f.format(date);
return new BigDecimal(returnStr);
}
/**
* 返回自定义格式的当前日期时间字符串
*
* @param format
* 格式规则
* @return String 返回当前字符串型日期时间
*/
public static String getCurrentTime(String format) {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat(format);
Date date = new Date();
returnStr = f.format(date);
return returnStr;
}
/**
* 返回当前字符串型日期
*
* @param format
* 格式规则
*
* @return String 返回的字符串型日期
*/
public static String getCurDate(String format) {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = new SimpleDateFormat(format);
String strDate = simpledateformat.format(calendar.getTime());
return strDate;
}
/**
* 将字符串型日期转换为日期型
*
* @param strDate
* 字符串型日期
* @param srcDateFormat
* 源日期格式
* @param dstDateFormat
* 目标日期格式
* @return Date 返回的util.Date型日期
*/
public static Date stringToDate(String strDate, String srcDateFormat,
String dstDateFormat) {
Date rtDate = null;
Date tmpDate = (new SimpleDateFormat(srcDateFormat)).parse(strDate,
new ParsePosition(0));
String tmpString = null;
if (tmpDate != null)
tmpString = (new SimpleDateFormat(dstDateFormat)).format(tmpDate);
if (tmpString != null)
rtDate = (new SimpleDateFormat(dstDateFormat)).parse(tmpString,
new ParsePosition(0));
return rtDate;
}
/**
* 获取当前时间,并以 yyyy-MM-dd HH:mm:ss字符串格式输出
*
* @author:mazhen
*/
public static String getNowDateAsStr() {
SimpleDateFormat dateFormat = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
return dateFormat.format(new Date());
}
/**
* 日期转换成字符串
*
* @param date
* @return str
*/
public static String DateToStr(Date date) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str = format.format(date);
return str;
}
/**
* 字符串转换成日期
*
* @param str
* @return date
*/
public static Date StrToDate(String str) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date date = null;
try {
date = format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}
/**
* 日期转换成字符串
*
* @param date
* @return str
* @throws ParseException
*/
public static String dataAdd1(String date) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dt = sdf.parse(date);
Calendar rightNow = Calendar.getInstance();
rightNow.setTime(dt);
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.YEAR, -1);// 日期减1年
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.MONTH, 3);// 日期加3个月
// System.out.println(sdf.format(rightNow.getTime()));
rightNow.add(Calendar.DAY_OF_YEAR, 1);// 日期加10天
// System.out.println(sdf.format(rightNow.getTime()));
return sdf.format(rightNow.getTime());
}
/**
* 日期转换成字符串
*
* @param date
* @return str
* @throws ParseException
*/
public static String dataAdd2(String date) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dt = sdf.parse(date);
Calendar rightNow = Calendar.getInstance();
rightNow.setTime(dt);
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.YEAR, -1);// 日期减1年
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.MONTH, 3);// 日期加3个月
// System.out.println(sdf.format(rightNow.getTime()));
rightNow.add(Calendar.DAY_OF_YEAR, 1);// 日期加10天
// System.out.println(sdf.format(rightNow.getTime()));
return sdf.format(rightNow.getTime());
}
/**
* 日期转换成字符串
*
* @param date
* @return str
* @throws ParseException
*/
public static String dataAdd(String date) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
Date dt = sdf.parse(date);
Calendar rightNow = Calendar.getInstance();
rightNow.setTime(dt);
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.YEAR, -1);// 日期减1年
// System.out.println(sdf.format(rightNow.getTime()));
// rightNow.add(Calendar.MONTH, 3);// 日期加3个月
// System.out.println(sdf.format(rightNow.getTime()));
rightNow.add(Calendar.DAY_OF_YEAR, 1);// 日期加10天
// System.out.println(sdf.format(rightNow.getTime()));
return sdf.format(rightNow.getTime());
}
public static String dateCha(Date start_time, Date end_time) {
String datestr = "";
try {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// java.util.Date now = df.parse(start_time);
// java.util.Date date=df.parse(end_time);
// long l=now.getTime()-date.getTime();
long l = end_time.getTime() - start_time.getTime();
long day = l / (24 * 60 * 60 * 1000);
long hour = (l / (60 * 60 * 1000) - day * 24);
long min = ((l / (60 * 1000)) - day * 24 * 60 - hour * 60);
long s = (l / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
datestr = "" + day + "天" + hour + "小时" + min + "分" + s + "秒";
} catch (Exception e) {
// TODO: handle exception
}
return datestr;
// System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒");
}
public static boolean isDateBefore(Date date2) {
Date date1 = new Date();// 当前时间
return date2.before(date1);
}
public static Date isDateBefore(Date date1, Date date2) {
return date1.before(date2) == true ? date1 : date2;
}
public static Date isDateAfter(Date date1, Date date2) {
return date1.before(date2) == true ? date2 : date1;
}
/**
* 获取最小的时间
*
* @return
*/
public static Date minTime_date(String start_time, String func_start_time) {
Date start_time_date = getDateByString(start_time);
Date func_start_time_date = getDateByString(func_start_time);
return isDateBefore(start_time_date, func_start_time_date);
}
/**
* 获取最小的时间
*
* @return
*/
public static Date maxTime_date(String start_time, String func_start_time) {
Date start_time_date = getDateByString(start_time);
Date func_start_time_date = getDateByString(func_start_time);
return isDateAfter(start_time_date, func_start_time_date);
}
/**
* 获取最小的时间
*
* @return
*/
public static Date minTime_date(Date start_time, Date func_start_time) {
return isDateBefore(start_time, func_start_time);
}
/**
* 获取最小的时间
*
* @return
*/
public static Date maxTime_date(Date start_time, Date func_start_time) {
return isDateAfter(start_time, func_start_time);
}
public static Date DateByTimestamp(Timestamp t) {
Date d = new Date(t.getTime());
return d;
}
public static Date getDateByString(String dateString) {
// String dateString = "2012-12-06 ";
Date date = null;
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
date = sdf.parse(dateString);
} catch (ParseException e) {
System.out.println(e.getMessage());
}
return date;
}
/**
* 输入两个日期相差的天数
*
*
* @return String 返回当前字符串型日期时间
*/
public static long getDayDiff(String beginDay, String endDay) {
long diffDay = -1;
if (beginDay == null || beginDay.equals("")) {
return diffDay;
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date beginDate = null;
Date endDate = null;
try {
beginDate = sdf.parse(beginDay);
endDate = sdf.parse(endDay);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
long diffTime = endDate.getTime() - beginDate.getTime();
long nd = 1000 * 24 * 60 * 60;
diffDay = diffTime / nd;
// double age = diffDay/365.0;
return diffDay;
}
/**
* 去掉日期里的 空格-:
*
* @param date
* @return
*/
public static String getDateNoSign(String date) {
String time = date;
time = time.replace("-", " ");
time = time.replace(":", " ");
time = time.replace(" ", "");
return time;
}
/**
* 将毫秒转换成日期格式yyyy-MM-dd HH:mm:ss
*
* @param millisecond
* @return
*/
public static String milliSecondToDate(long millisecond) {
// long millisecond = 1483159625851l;
Date date = new Date(millisecond);
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
return format.format(date);
}
/**
* 将日期格式yyyy-MM-dd HH:mm:ss转换成毫秒
*
* @param dateTime
* @return
* @throws ParseException
*/
public static long dateToMilliSecond(String dateTime) throws ParseException {
// String dateTime = "2016-12-31 12:30:45";
Calendar calendar = Calendar.getInstance();
calendar.setTime(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
.parse(dateTime));
return calendar.getTimeInMillis();
}
/**
* 获取当前时间String类型返回：HH:mm:ss
* @return
*/
public static String getCurrentTimeToInt() {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat("HH:mm:ss");
Date date = new Date();
returnStr = f.format(date);
return returnStr;
}
/**
* 获取当前周几String类型返回：星期*
* @return
*/
public static String getWeek() {
Date date=new Date();
SimpleDateFormat dateFm = new SimpleDateFormat("EEEE");
String format = dateFm.format(date);
return format;
}
/**
* 获取当前几号int类型返回：dd
* @return
*/
public static int getTodayDay() {
int y,m,d,h,mi,s;
Calendar cal=Calendar.getInstance();
//y=cal.get(Calendar.YEAR);
//m=cal.get(Calendar.MONTH);
d=cal.get(Calendar.DATE);
//h=cal.get(Calendar.HOUR_OF_DAY);
//mi=cal.get(Calendar.MINUTE);
//s=cal.get(Calendar.SECOND);
//System.out.println("现在时刻是"+y+"年"+m+"月"+d+"日"+h+"时"+mi+"分"+s+"秒");
return d;
}
/**
* 获取当前时间前5分钟,返回int类型HHmmss
* @param stuff
* @return
*/
public static int getCurrentTimeBeforeFive(){
SimpleDateFormat sdf = new SimpleDateFormat("HHmmss");
Calendar beforeTime = Calendar.getInstance();
beforeTime.add(Calendar.MINUTE, -5);// 5分钟之前的时间
Date beforeD = beforeTime.getTime();
String time = sdf.format(beforeD);
return Integer.valueOf(time);
}
/**
* 获取当前时间,返回int类型HHmmss
* @param stuff
* @return
*/
public static int getCurrentTimeNow(){
SimpleDateFormat sdf = new SimpleDateFormat("HHmmss");
String time = sdf.format(new Date());
return Integer.valueOf(time);
}
/**
* 获取当前时间后5分钟,返回int类型HHmmss
* @param stuff
* @return
*/
public static int getCurrentTimeAfterFive(){
SimpleDateFormat sdf = new SimpleDateFormat("HHmmss");
Calendar afterTime = Calendar.getInstance();
afterTime.add(Calendar.MINUTE, 5);// 5分钟之后的时间
Date beforeD = afterTime.getTime();
String time = sdf.format(beforeD);
return Integer.valueOf(time);
}
public static LinkedList<String> getNowadayYear() {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = new SimpleDateFormat("MM");
String strDate = simpledateformat.format(calendar.getTime());
Integer month = Integer.valueOf(strDate);
LinkedList<String> months = new LinkedList<String>();
for (int i = 0; i < month; i++) {
calendar.setTime(new Date());
calendar.add(Calendar.MONTH, -(month-i-1));
Date date = calendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
String string = sdf.format(date);
months.add(string);
}
return months;
}
public static LinkedList<String> getNowadayMonth() {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat simpledateformat = new SimpleDateFormat("dd");
String strDate = simpledateformat.format(calendar.getTime());
Integer day = Integer.valueOf(strDate);
LinkedList<String> days = new LinkedList<String>();
for (int i = 0; i < day; i++) {
calendar.setTime(new Date());
calendar.add(Calendar.DATE, -(day-i-1));
Date date = calendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String string = sdf.format(date);
days.add(string);
}
return days;
}
public static Map<String, Object> getNowadayWeek() {
HashMap<String, Object> map = new HashMap<String, Object>();
Calendar calendar = Calendar.getInstance();
int week = calendar.get(Calendar.DAY_OF_WEEK) - 1;
String[] weekDays = {"星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"};
LinkedList<String> days = new LinkedList<String>();
LinkedList<String> weeks = new LinkedList<String>();
for (int i = 0; i < week; i++) {
calendar.setTime(new Date());
calendar.add(Calendar.DATE, -(week-i-1));
Date date = calendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String string = sdf.format(date);
days.add(string);
weeks.add(weekDays[i]);
}
map.put("days", days);
map.put("weeks", weeks);
return map;
}
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