///////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 smilonet.
// All rights reserved
///////////////////////////////////////////////////////////////////////////////////////////////////
package com.smilonet.common.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* 时间对象和字符串的转换工具
*
* @author wanglong(a)smilonet.com
* @version 1.0
* @since 1.0
*/
public class DateTimeUtils {
// 工具类不允许创建实例
private DateTimeUtils() {
}
public enum TimeUnit {
year, month, week, day, hour, minute, secend, millisecond
}
public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
public static final Long MSEL_PER_SECEND = 1000l;
public static final Long MSEL_PER_MINUTE = MSEL_PER_SECEND * 60;
public static final Long MSEL_PER_HOUR = MSEL_PER_MINUTE * 60;
public static final Long MSEL_PER_DAY = MSEL_PER_HOUR * 24;
public static final Long MSEL_PER_WEEK = MSEL_PER_DAY * 7;
/**
* 按照yyyy-MM-dd的格式将日期转换为字符串
*
* @param date
* @return
*/
public static String convertDateToString(Date date) {
return convertDateToString(date, DEFAULT_DATE_FORMAT);
}
/**
* 按照yyyy-MM-dd HH:mm:ss的格式将日期转换为字符串
*
* @param date
* @return
*/
public static String convertTimeToString(Date date) {
return convertTimeToString(date, DEFAULT_DATE_FORMAT);
}
/**
* 按照指定格式，将日期转换为字符串
*
* @param date
* @param pattern
* @return
*/
public static String convertDateToString(Date date, String pattern) {
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(date);
}
/**
* 按照指定格式，将日期转换为字符串
*
* @param date
* @param pattern
* @return
*/
public static String convertTimeToString(Date date, String pattern) {
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(date);
}
/**
* 按照格式将字符串转换为date
*
* @param dateString
* @param pattern
* @return
* @throws ParseException
*/
public static Date convertStringToDate(String dateString, String pattern) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.parse(dateString);
}
/**
* 按照yyyy-MM-dd的格式将字符串转换为日期
*
* @param dateString
* @return
* @throws ParseException
*/
public static Date convertStringToDate(String dateString) {
try {
SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_DATE_FORMAT);
return sdf.parse(dateString);
} catch (ParseException e) {
return null;
}
}
/**
* 按照yyyy-MM-dd的格式将字符串转换为日期
*
* @param dateString
* @return
* @throws ParseException
*/
public static Date convertStringToTime(String dateString) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_DATE_TIME_FORMAT);
return sdf.parse(dateString);
}
/**
* 获取当前的系统日期
*
* @return 系统当前日期，格式年(4位)
*/
public static String getYear() {
Calendar CD = Calendar.getInstance();
int YY = CD.get(Calendar.YEAR);
StringBuffer curDateString = new StringBuffer();
curDateString.append(YY);
return curDateString.toString();
}
/**
* 获取当前的系统日期
*
* @return 系统当前日期，格式月（两位）
*/
public static String getMonth() {
Calendar CD = Calendar.getInstance();
int MM = CD.get(Calendar.MONTH) + 1;
StringBuffer curDateString = new StringBuffer();
curDateString.append(MM);
return curDateString.toString();
}
/**
* 获取当前的系统日期
*
* @return 系统当前日期，格式日（两位）
*/
public static String getDay() {
Calendar CD = Calendar.getInstance();
int DD = CD.get(Calendar.DATE);
StringBuffer curDateString = new StringBuffer();
curDateString.append(DD);
return curDateString.toString();
}
public static String getDate(String dateFormat) {
return convertDateToString(new Date(), dateFormat);
}
/**
* 获取当前的系统日期
*
* @return 系统当前日期，格式西元年(4位)+月(2位)+日(2位)
*/
public static String getDate() {
return convertDateToString(new Date());
// Calendar CD = Calendar.getInstance();
// int YY = CD.get(Calendar.YEAR);
// int MM = CD.get(Calendar.MONTH) + 1;
// int DD = CD.get(Calendar.DATE);
// StringBuffer curDateString = new StringBuffer();
// curDateString.append(YY);
// curDateString.append("-");
// curDateString.append(StringUtils.formatStringLength(String.valueOf(MM),
// '0', 2));
// curDateString.append("-");
// curDateString.append(StringUtils.formatStringLength(String.valueOf(DD),
// '0', 2));
// return curDateString.toString();
}
/**
* 获取当前的系统时间
*
* @return 系统当前时间，格式时(2位)+分(2位)+秒(2位)
*/
public static String getDateTime() {
Calendar CD = Calendar.getInstance();
int YY = CD.get(Calendar.YEAR);
int MM = CD.get(Calendar.MONTH) + 1;
int DD = CD.get(Calendar.DATE);
int HH = CD.get(Calendar.HOUR_OF_DAY);
int mm = CD.get(Calendar.MINUTE);
int ss = CD.get(Calendar.SECOND);
StringBuffer curDateTimeString = new StringBuffer();
curDateTimeString.append(String.valueOf(YY));
curDateTimeString.append("-");
curDateTimeString.append(StringUtils.formatStringLength(String.valueOf(MM), '0', -2));
curDateTimeString.append("-");
curDateTimeString.append(StringUtils.formatStringLength(String.valueOf(DD), '0', -2));
curDateTimeString.append(" ");
curDateTimeString.append(StringUtils.formatStringLength(String.valueOf(HH), '0', -2));
curDateTimeString.append(":");
curDateTimeString.append(StringUtils.formatStringLength(String.valueOf(mm), '0', -2));
curDateTimeString.append(":");
curDateTimeString.append(StringUtils.formatStringLength(String.valueOf(ss), '0', -2));
return curDateTimeString.toString();
}
/**
* 获取当前的系统时间
*
* @return 系统当前时间，格式时(2位)+分(2位)+秒(2位)
*/
public static String getTime() {
Calendar CD = Calendar.getInstance();
int HH = CD.get(Calendar.HOUR_OF_DAY);
int mm = CD.get(Calendar.MINUTE);
int ss = CD.get(Calendar.SECOND);
StringBuffer curTimeString = new StringBuffer();
curTimeString.append(StringUtils.formatStringLength(String.valueOf(HH), '0', -2));
curTimeString.append(":");
curTimeString.append(StringUtils.formatStringLength(String.valueOf(mm), '0', -2));
curTimeString.append(":");
curTimeString.append(StringUtils.formatStringLength(String.valueOf(ss), '0', -2));
return curTimeString.toString();
}
/**
* 获取当前的系统时间的小时
*
* @return 系统当前小时
*/
public static int getHour() {
Calendar CD = Calendar.getInstance();
int HH = CD.get(Calendar.HOUR_OF_DAY);
return HH;
}
/**
* 获取当前的系统时间的分钟
*
* @return 系统当前分钟
*/
public static int getMinute() {
Calendar CD = Calendar.getInstance();
int mm = CD.get(Calendar.MINUTE);
return mm;
}
public static Long getTimeDispersion(Date beginTime, Date endTime, TimeUnit timeUnit) {
if (endTime == null) {
return null;
}
Long dis = endTime.getTime() - beginTime.getTime();
Long result = dis;
switch (timeUnit) {
case year:
case month:
break;
case week:
result = dis / MSEL_PER_WEEK;
break;
case day:
result = dis / MSEL_PER_DAY;
break;
case hour:
result = dis / MSEL_PER_HOUR;
break;
case minute:
result = dis / MSEL_PER_MINUTE;
break;
case secend:
result = dis / MSEL_PER_SECEND;
break;
case millisecond:
break;
}
return result;
}
/**
* 获取两个日期的差
*
* @param beginTime
* @param endTime
* @param timeUnit
* @return
*/
public static Long getTimeDispersion(String beginTime, String endTime, TimeUnit timeUnit) {
try {
if (StringUtils.isEmpty(endTime)) {
return null;
}
return getTimeDispersion(convertStringToTime(endTime), convertStringToTime(beginTime), timeUnit);
} catch (ParseException e) {
return null;
}
}
/**
* 将时间向前（正数），后（负数）移动
*
* @param beMovedDateString
* @param movedDays
* @return
* @throws ParseException
*/
public static String moveTime(String beMovedTimeString, int movedDays) throws ParseException {
if (StringUtils.isEmpty(beMovedTimeString)) {
beMovedTimeString = getDateTime();
}
Date beMovedTime = convertStringToTime(beMovedTimeString);
Date moveResult = moveDateTime(beMovedTime, movedDays);
return convertTimeToString(moveResult);
}
/**
* 将日期向前（正数），后（负数）移动
*
* @param beMovedDateString
* @param movedDays
* @return
* @throws ParseException
*/
public static String moveDate(String beMovedDateString, int movedDays) throws ParseException {
if (StringUtils.isEmpty(beMovedDateString)) {
beMovedDateString = getDate();
}
Date beMovedDate = convertStringToTime(beMovedDateString);
Date moveResult = moveDateTime(beMovedDate, movedDays);
return convertDateToString(moveResult);
}
/**
* 移动日期
*
* @param movedDate
* @param movedNum
* @return
*/
public static Date moveDateTime(Date movedDate, int movedNum) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(movedDate);
calendar.add(Calendar.DAY_OF_MONTH, movedNum);
return calendar.getTime();
}
/**
* 判断字符串是否是日期
*
* @param targetString
* @return
*/
public static boolean isDate(String targetString) {
if (StringUtils.matchReg(targetString, "^(([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]{1}|[0-9]{1}[1-9][0-9]{2}|[1-9][0-9]{3})-(((0[13578]|1[02])-(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)-(0[1-9]|[12][0-9]|30))|(02-(0[1-9]|[1][0-9]|2[0-8]))))|((([0-9]{2})(0[48]|[2468][048]|[13579][26])|((0[48]|[2468][048]|[3579][26])00))-02-29)$")) {
return true;
} else {
return false;
}
}
}