2.Java 时间日期格式转换
import java.util.*;import java.text.*;import java.util.Calendar;public class VeDate { /**
* 获取现在时间
*
* @return
*/
public static Date getNowDate() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime);
ParsePosition pos = new ParsePosition(8);
Date currentTime_2 = formatter.parse(dateString, pos); return currentTime_2;
} /**
* 获取现在时间
*
* @return
*/
public static Date getNowDateShort() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String dateString = formatter.format(currentTime);
ParsePosition pos = new ParsePosition(8);
Date currentTime_2 = formatter.parse(dateString, pos); return currentTime_2;
} /**
* 获取现在时间
*
* @return
*/
public static String getStringDate() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime); return dateString;
} /**
* 获取现在时间
*
* @return
*/
public static String getStringDateShort() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String dateString = formatter.format(currentTime); return dateString;
} /**
*
*
* @return
*/
public static String getTimeShort() {
SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
Date currentTime = new Date();
String dateString = formatter.format(currentTime); return dateString;
} /**
* 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss
*
* @param strDate
* @return
*/
public static Date strToDateLong(String strDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos); return strtodate;
} /**
*
*
* @param dateDate
* @return
*/
public static String dateToStrLong(java.util.Date dateDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(dateDate); return dateString;
} /**
*
* @param dateDate
* @param k
* @return
*/
public static String dateToStr(java.util.Date dateDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String dateString = formatter.format(dateDate); return dateString;
} /**
*
*
* @param strDate
* @return
*/
public static Date strToDate(String strDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos); return strtodate;
} /**
*
*
* @return
*/
public static Date getNow() {
Date currentTime = new Date(); return currentTime;
} /**
*
*
* @param day
* @return
*/
public static Date getLastDate(long day) {
Date date = new Date(); long date_3_hm = date.getTime() - 3600000 * 34 * day;
Date date_3_hm_date = new Date(date_3_hm); return date_3_hm_date;
} /**
* 得到现在时间
*
* @return
*/
public static String getStringToday() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd HHmmss");
String dateString = formatter.format(currentTime); return dateString;
} /**
*
*/
public static String getHour() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime);
String hour;
hour = dateString.substring(11, 13); return hour;
} /**
*
*
* @return
*/
public static String getTime() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime);
String min;
min = dateString.substring(14, 16); return min;
} /**
*
*
* @param sformat
*
* @return
*/
public static String getUserDate(String sformat) {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat(sformat);
String dateString = formatter.format(currentTime); return dateString;
} /**
*
*/
public static String getTwoHour(String st1, String st2) {
String[] kk = null;
String[] jj = null;
kk = st1.split(":");
jj = st2.split(":"); if (Integer.parseInt(kk[0]) < Integer.parseInt(jj[0])) return "0"; else { double y = Double.parseDouble(kk[0]) + Double.parseDouble(kk[1]) / 60; double u = Double.parseDouble(jj[0]) + Double.parseDouble(jj[1]) / 60; if ((y - u) > 0) return y - u + ""; else
return "0";
}
} /**
*
*/
public static String getTwoDay(String sj1, String sj2) {
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); long day = 0; try {
java.util.Date date = myFormatter.parse(sj1);
java.util.Date mydate = myFormatter.parse(sj2);
day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
} catch (Exception e) { return "";
} return day + "";
} /**
*
*/
public static String getPreTime(String sj1, String jj) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String mydate1 = ""; try {
Date date1 = format.parse(sj1); long Time = (date1.getTime() / 1000) + Integer.parseInt(jj) * 60;
date1.setTime(Time * 1000);
mydate1 = format.format(date1);
} catch (Exception e) {
} return mydate1;
} /**
*
*/
public static String getNextDay(String nowdate, String delay) { try{
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String mdate = "";
Date d = strToDate(nowdate); long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;
d.setTime(myTime * 1000);
mdate = format.format(d); return mdate;
}catch(Exception e){ return "";
}
} /**
*
*
* @param ddate
* @return
*/
public static boolean isLeapYear(String ddate) { /**
*
*/
Date d = strToDate(ddate);
GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
gc.setTime(d); int year = gc.get(Calendar.YEAR); if ((year % 400) == 0) return true; else if ((year % 4) == 0) { if ((year % 100) == 0) return false; else
return true;
} else
return false;
} /**
*
*
* @param str
* @return
*/
public static String getEDate(String str) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(str, pos);
String j = strtodate.toString();
String[] k = j.split(" "); return k[2] + k[1].toUpperCase() + k[5].substring(2, 4);
} /**
*
*
* @param dat
* @return
*/
public static String getEndDateOfMonth(String dat) {// yyyy-MM-dd
String str = dat.substring(0, 8);
String month = dat.substring(5, 7); int mon = Integer.parseInt(month); if (mon == 1 || mon == 3 || mon == 5 || mon == 7 || mon == 8 || mon == 10 || mon == 12) {
str += "31";
} else if (mon == 4 || mon == 6 || mon == 9 || mon == 11) {
str += "30";
} else { if (isLeapYear(dat)) {
str += "29";
} else {
str += "28";
}
} return str;
} /**
*
*
* @param date1
* @param date2
* @return
*/
public static boolean isSameWeekDates(Date date1, Date date2) {
Calendar cal1 = Calendar.getInstance();
Calendar cal2 = Calendar.getInstance();
cal1.setTime(date1);
cal2.setTime(date2); int subYear = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR); if (0 == subYear) { if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) return true;
} else if (1 == subYear && 11 == cal2.get(Calendar.MONTH)) { // 如果12月的最后一周横跨来年第一周的话则最后一周即算做来年的第一周
if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) return true;
} else if (-1 == subYear && 11 == cal1.get(Calendar.MONTH)) { if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) return true;
} return false;
} /**
*
*
* @return
*/
public static String getSeqWeek() {
Calendar c = Calendar.getInstance(Locale.CHINA);
String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR)); if (week.length() == 1)
week = "0" + week;
String year = Integer.toString(c.get(Calendar.YEAR)); return year + week;
} /**
*
*
* @param sdate
* @param num
* @return
*/
public static String getWeek(String sdate, String num) { // 再转换为时间
Date dd = VeDate.strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(dd); if (num.equals("1")) // 返回星期一所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); else if (num.equals("2")) // 返回星期二所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY); else if (num.equals("3")) // 返回星期三所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY); else if (num.equals("4")) // 返回星期四所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.THURSDAY); else if (num.equals("5")) // 返回星期五所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY); else if (num.equals("6")) // 返回星期六所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY); else if (num.equals("0")) // 返回星期日所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
} /**
*
*
* @param sdate
* @return
*/
public static String getWeek(String sdate) { // 再转换为时间
Date date = VeDate.strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(date); // int hour=c.get(Calendar.DAY_OF_WEEK);
// hour中存的就是星期几了，其范围 1~7
// 1=星期日 7=星期六，其他类推
return new SimpleDateFormat("EEEE").format(c.getTime());
} public static String getWeekStr(String sdate){
String str = "";
str = VeDate.getWeek(sdate); if("1".equals(str)){
str = "星期日";
}else if("2".equals(str)){
str = "星期一";
}else if("3".equals(str)){
str = "星期二";
}else if("4".equals(str)){
str = "星期三";
}else if("5".equals(str)){
str = "星期四";
}else if("6".equals(str)){
str = "星期五";
}else if("7".equals(str)){
str = "星期六";
} return str;
} /**
*
*
* @param date1
* @param date2
* @return
*/
public static long getDays(String date1, String date2) { if (date1 == null || date1.equals("")) return 0; if (date2 == null || date2.equals("")) return 0; // 转换为标准时间
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
java.util.Date date = null;
java.util.Date mydate = null; try {
date = myFormatter.parse(date1);
mydate = myFormatter.parse(date2);
} catch (Exception e) {
} long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); return day;
} /**
*
*
* @param sdate
* @return
*/
public static String getNowMonth(String sdate) { // 取该时间所在月的一号
sdate = sdate.substring(0, 8) + "01"; // 得到这个月的1号是星期几
Date date = VeDate.strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(date); int u = c.get(Calendar.DAY_OF_WEEK);
String newday = VeDate.getNextDay(sdate, (1 - u) + ""); return newday;
} /**
*
*
* @param k
* 表示是取几位随机数，可以自己定
*/
public static String getNo(int k) { return getUserDate("yyyyMMddhhmmss") + getRandom(k);
} /**
*
*
* @param i
* @return
*/
public static String getRandom(int i) {
Random jjj = new Random(); // int suiJiShu = jjj.nextInt(9);
if (i == 0) return "";
String jj = ""; for (int k = 0; k < i; k++) {
jj = jj + jjj.nextInt(9);
} return jj;
} /**
*
* @param args
*/
public static boolean RightDate(String date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
; if (date == null) return false; if (date.length() > 10) {
sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
} else {
sdf = new SimpleDateFormat("yyyy-MM-dd");
} try {
sdf.parse(date);
} catch (ParseException pe) { return false;
} return true;
} /***************************************************************************
*
**************************************************************************/
public static String getStringDateMonth(String sdate, String nd, String yf, String rq, String format) {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String dateString = formatter.format(currentTime);
String s_nd = dateString.substring(0, 4); // 年份
String s_yf = dateString.substring(5, 7); // 月份
String s_rq = dateString.substring(8, 10); // 日期
String sreturn = "";
roc.util.MyChar mc = new roc.util.MyChar(); if (sdate == null || sdate.equals("") || !mc.Isdate(sdate)) { // 处理空值情况
if (nd.equals("1")) {
sreturn = s_nd; // 处理间隔符
if (format.equals("1"))
sreturn = sreturn + "年"; else if (format.equals("2"))
sreturn = sreturn + "-"; else if (format.equals("3"))
sreturn = sreturn + "/"; else if (format.equals("5"))
sreturn = sreturn + ".";
} // 处理月份
if (yf.equals("1")) {
sreturn = sreturn + s_yf; if (format.equals("1"))
sreturn = sreturn + "月"; else if (format.equals("2"))
sreturn = sreturn + "-"; else if (format.equals("3"))
sreturn = sreturn + "/"; else if (format.equals("5"))
sreturn = sreturn + ".";
} // 处理日期
if (rq.equals("1")) {
sreturn = sreturn + s_rq; if (format.equals("1"))
sreturn = sreturn + "日";
}
} else { // 不是空值，也是一个合法的日期值，则先将其转换为标准的时间格式
sdate = roc.util.RocDate.getOKDate(sdate);
s_nd = sdate.substring(0, 4); // 年份
s_yf = sdate.substring(5, 7); // 月份
s_rq = sdate.substring(8, 10); // 日期
if (nd.equals("1")) {
sreturn = s_nd; // 处理间隔符
if (format.equals("1"))
sreturn = sreturn + "年"; else if (format.equals("2"))
sreturn = sreturn + "-"; else if (format.equals("3"))
sreturn = sreturn + "/"; else if (format.equals("5"))
sreturn = sreturn + ".";
} // 处理月份
if (yf.equals("1")) {
sreturn = sreturn + s_yf; if (format.equals("1"))
sreturn = sreturn + "月"; else if (format.equals("2"))
sreturn = sreturn + "-"; else if (format.equals("3"))
sreturn = sreturn + "/"; else if (format.equals("5"))
sreturn = sreturn + ".";
} // 处理日期
if (rq.equals("1")) {
sreturn = sreturn + s_rq; if (format.equals("1"))
sreturn = sreturn + "日";
}
} return sreturn;
} public static String getNextMonthDay(String sdate, int m) {
sdate = getOKDate(sdate); int year = Integer.parseInt(sdate.substring(0, 4)); int month = Integer.parseInt(sdate.substring(5, 7));
month = month + m; if (month < 0) {
month = month + 12;
year = year - 1;
} else if (month > 12) {
month = month - 12;
year = year + 1;
}
String smonth = ""; if (month < 10)
smonth = "0" + month; else
smonth = "" + month; return year + "-" + smonth + "-10";
} public static String getOKDate(String sdate) { if (sdate == null || sdate.equals("")) return getStringDateShort(); if (!VeStr.Isdate(sdate)) {
sdate = getStringDateShort();
} // 将“/”转换为“-”
sdate = VeStr.Replace(sdate, "/", "-"); // 如果只有8位长度，则要进行转换
if (sdate.length() == 8)
sdate = sdate.substring(0, 4) + "-" + sdate.substring(4, 6) + "-" + sdate.substring(6, 8);
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(sdate, pos);
String dateString = formatter.format(strtodate); return dateString;
} public static void main(String[] args) throws Exception { try { //System.out.print(Integer.valueOf(getTwoDay("2006-11-03 12:22:10", "2006-11-02 11:22:09")));
} catch (Exception e) { throw new Exception();
} //System.out.println("sss");
}
本文转自 潜心笃志 51CTO博客，原文链接:http://blog.51cto.com/82711020/1973670
