dateUtil.java工具类

柔光的暖阳◎ 2021-10-08 07:08 358阅读 0赞

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package com.gootrip.util;
 
 /**
 * Title: 时间和日期的工具类
 * Description: DateUtil类包含了标准的时间和日期格式，以及这些格式在字符串及日期之间转换的方法
 * Copyright: Copyright (c) 2007 advance,Inc. All Rights Reserved
 * Company: advance,Inc.
 * @author advance
 * @version 1.0
 */
 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
 
 public class DateUtil {
 	//~ Static fields/initializers =============================================
 
 	private static String datePattern = "MM/dd/yyyy";
 
 	private static String timePattern = datePattern + " HH:MM a";
 
 	//~ Methods ================================================================
 
 	/**
 	 * Return default datePattern (MM/dd/yyyy)
 	 * @return a string representing the date pattern on the UI
 	 */
 	public static String getDatePattern() {
 		return datePattern;
 	}
 
 	/**
 	 * This method attempts to convert an Oracle-formatted date
 	 * in the form dd-MMM-yyyy to mm/dd/yyyy.
 	 *
 	 * @param aDate date from database as a string
 	 * @return formatted string for the ui
 	 */
 	public static final String getDate(Date aDate) {
 		SimpleDateFormat df = null;
 		String returnValue = "";
 
 		if (aDate != null) {
 			df = new SimpleDateFormat(datePattern);
 			returnValue = df.format(aDate);
 		}
 
 		return (returnValue);
 	}
 
 	public static final String date2Str(Date aDate) {
 		SimpleDateFormat df = null;
 		String returnValue = "";
 
 		if (aDate != null) {
 			df = new SimpleDateFormat(datePattern);
 			returnValue = df.format(aDate);
 		}
 
 		return (returnValue);
 	}
 
 	public static final String date2Str(String pattern, Date aDate) {
 		SimpleDateFormat df = null;
 		String returnValue = "";
 
 		if (aDate != null) {
 			df = new SimpleDateFormat(pattern);
 			returnValue = df.format(aDate);
 		}
 		return (returnValue);
 	}
 
 	/**
 	 * This method generates a string representation of a date/time
 	 * in the format you specify on input
 	 *
 	 * @param aMask the date pattern the string is in
 	 * @param strDate a string representation of a date
 	 * @return a converted Date object
 	 * @see java.text.SimpleDateFormat
 	 * @throws ParseException
 	 */
 	public static final Date convertStringToDate(String aMask, String strDate)
 			throws ParseException {
 		SimpleDateFormat df = null;
 		Date date = null;
 		df = new SimpleDateFormat(aMask);
 
 		try {
 			date = df.parse(strDate);
 		} catch (ParseException pe) {
 			return null;
 		}
 
 		return (date);
 	}
 
 	public static final Date str2Date(String aMask, String strDate)
 			throws ParseException {
 		SimpleDateFormat df = null;
 		Date date = null;
 		df = new SimpleDateFormat(aMask);
 
 		try {
 			date = df.parse(strDate);
 		} catch (ParseException pe) {
 			return null;
 		}
 
 		return (date);
 	}
 
 	/**
 	 * This method returns the current date time in the format:
 	 * MM/dd/yyyy HH:MM a
 	 *
 	 * @param theTime the current time
 	 * @return the current date/time
 	 */
 	public static String getTimeNow(Date theTime) {
 		return getDateTime(timePattern, theTime);
 	}
 
 	/**
 	 * This method returns the current date in the format: MM/dd/yyyy
 	 *
 	 * @return the current date
 	 * @throws ParseException
 	 */
 	public static Calendar getToday() throws ParseException {
 		Date today = new Date();
 		SimpleDateFormat df = new SimpleDateFormat(datePattern);
 
 		// This seems like quite a hack (date -> string -> date),
 		// but it works ;-)
 		String todayAsString = df.format(today);
 		Calendar cal = new GregorianCalendar();
 		cal.setTime(convertStringToDate(todayAsString));
 
 		return cal;
 	}
 
 	/**
 	 * This method generates a string representation of a date's date/time
 	 * in the format you specify on input
 	 *
 	 * @param aMask the date pattern the string is in
 	 * @param aDate a date object
 	 * @return a formatted string representation of the date
 	 *
 	 * @see java.text.SimpleDateFormat
 	 */
 	public static final String getDateTime(String aMask, Date aDate) {
 		SimpleDateFormat df = null;
 		String returnValue = "";
 
 		if (aDate == null) {
 			System.out.print("aDate is null!");
 		} else {
 			df = new SimpleDateFormat(aMask);
 			returnValue = df.format(aDate);
 		}
 
 		return (returnValue);
 	}
 
 	/**
 	 * This method generates a string representation of a date based
 	 * on the System Property 'dateFormat'
 	 * in the format you specify on input
 	 *
 	 * @param aDate A date to convert
 	 * @return a string representation of the date
 	 */
 	public static final String convertDateToString(Date aDate) {
 		return getDateTime(datePattern, aDate);
 	}
 
 	/**
 	 * This method converts a String to a date using the datePattern
 	 *
 	 * @param strDate the date to convert (in format MM/dd/yyyy)
 	 * @return a date object
 	 *
 	 * @throws ParseException
 	 */
 	public static Date convertStringToDate(String strDate)
 			throws ParseException {
 		Date aDate = null;
 
 		try {
 
 			aDate = convertStringToDate(datePattern, strDate);
 		} catch (ParseException pe) {
 			//log.error("Could not convert '" + strDate
 			// + "' to a date, throwing exception");
 			pe.printStackTrace();
 			return null;
 
 		}
 		return aDate;
 	}
 
 	//日期格式转换成时间戳
 	public static long getTimeStamp(String pattern, String strDate) {
 		long returnTimeStamp = 0;
 		Date aDate = null;
 		try {
 			aDate = convertStringToDate(pattern, strDate);
 		} catch (ParseException pe) {
 			aDate = null;
 		}
 		if (aDate == null) {
 			returnTimeStamp = 0;
 		} else {
 			returnTimeStamp = aDate.getTime();
 		}
 		return returnTimeStamp;
 	}
 
 	//获取当前日期的邮戳
 	public static long getNowTimeStamp() {
 		long returnTimeStamp = 0;
 		Date aDate = null;
 		try {
 			aDate = convertStringToDate("yyyy-MM-dd HH:mm:ss", getNowDateTime());
 		} catch (ParseException pe) {
 			aDate = null;
 		}
 		if (aDate == null) {
 			returnTimeStamp = 0;
 		} else {
 			returnTimeStamp = aDate.getTime();
 		}
 		return returnTimeStamp;
 	}
 
 	/**
 	 *得到格式化后的系统当前日期
 	 *@param strScheme 格式模式字符串
 	 *@return 格式化后的系统当前时间，如果有异常产生，返回空串""
 	 *@see java.util.SimpleDateFormat
 	 */
 	public static final String getNowDateTime(String strScheme) {
 		String strReturn = null;
 		Date now = new Date();
 		try {
 			SimpleDateFormat sdf = new SimpleDateFormat(strScheme);
 			strReturn = sdf.format(now);
 		} catch (Exception e) {
 			strReturn = "";
 		}
 		return strReturn;
 	}
 
 	public static final String getNowDateTime() {
 		String strReturn = null;
 		Date now = new Date();
 		try {
 			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 			strReturn = sdf.format(now);
 		} catch (Exception e) {
 			strReturn = "";
 		}
 		return strReturn;
 	}
 
 	/**
 	 *转化日期格式"MM/dd/YY、MM.dd.YY、MM-dd-YY、MM/dd/YY"，并输出为正常的格式yyyy-MM-dd
 	 *@param strDate 待转换的日期格式
 	 *@return 格式化后的日期，如果有异常产生，返回空串""
 	 *@see java.util.SimpleDateFormat
 	 */
 	public static final String convertNormalDate(String strDate) {
 		String strReturn = null;
 		//先把传入参数分格符转换成java认识的分格符
 		String[] date_arr = strDate.split("\\.|\\/|\\-");
 		try {
 			if (date_arr.length == 3) {
 				if (date_arr[2].length() != 4) {
 					String nowYear = getNowDateTime("yyyy");
 					date_arr[2] = nowYear.substring(0, 2) + date_arr[2];
 				}
 				strReturn = DateUtil.getDateTime("yyyy-MM-dd",
 						convertStringToDate(combineStringArray(date_arr, "/")));
 			}
 
 		} catch (Exception e) {
 			return strReturn;
 		}
 		return strReturn;
 	}
 
 	/**
 	 * 将字符串数组使用指定的分隔符合并成一个字符串。
 	 * @param array 字符串数组
 	 * @param delim 分隔符，为null的时候使用""作为分隔符（即没有分隔符）
 	 * @return 合并后的字符串
 	 * @since 0.4
 	 */
 	public static final String combineStringArray(String[] array, String delim) {
 		int length = array.length - 1;
 		if (delim == null) {
 			delim = "";
 		}
 		StringBuffer result = new StringBuffer(length * 8);
 		for (int i = 0; i < length; i++) {
 			result.append(array[i]);
 			result.append(delim);
 		}
 		result.append(array[length]);
 		return result.toString();
 	}
 
 	public static final int getWeekNum(String strWeek) {
 		int returnValue = 0;
 		if (strWeek.equals("Mon")) {
 			returnValue = 1;
 		} else if (strWeek.equals("Tue")) {
 			returnValue = 2;
 		} else if (strWeek.equals("Wed")) {
 			returnValue = 3;
 		} else if (strWeek.equals("Thu")) {
 			returnValue = 4;
 		} else if (strWeek.equals("Fri")) {
 			returnValue = 5;
 		} else if (strWeek.equals("Sat")) {
 			returnValue = 6;
 		} else if (strWeek.equals("Sun")) {
 			returnValue = 0;
 		} else if (strWeek == null) {
 			returnValue = 0;
 		}
 
 		return returnValue;
 	}
 	/**
 	 * 获取日期字符串中的中文时间表示字符串
 	 * @param strDate
 	 * @return
 	 */
 	public static final String getSabreTime(String strDate) {
 		String strReturn = "";
 		try {
 
 			Date d = DateUtil.str2Date("yyyy-MM-dd HH:mm:ss", CTool.replace(
 					strDate, "T", " "));
 			strReturn = DateUtil.date2Str("hh:mm aaa", d);
 
 		} catch (Exception e) {
 			return strReturn;
 		}
 		return strReturn;
 	}
 	/**
 	 * 获取日期字符串中的中文日期表示字符串
 	 * @param strDate
 	 * @return
 	 */
 	public static final String getSabreDate(String strDate) {
 		String strReturn = "";
 		try {
 			String p = null;
 			if (strDate.length() > 10)
 				p = "yyyy-MM-dd HH:mm:ss";
 			else
 				p = "yyyy-MM-dd";
 			Date d = DateUtil.str2Date(p, CTool.replace(strDate, "T", " "));
 			strReturn = DateUtil.date2Str("EEE d-MMM", d);
 
 		} catch (Exception e) {
 			return strReturn;
 		}
 		return strReturn;
 	}
 	/**
 	 * 获取日期字符串的中文日期时间表示
 	 * @param strDate
 	 * @return
 	 */
 	public static final String getSabreDateTime(String strDate) {
 		String strReturn = "";
 		try {
 			String p = null;
 			if (strDate.length() > 10)
 				p = "yyyy-MM-dd HH:mm:ss";
 			else
 				p = "yyyy-MM-dd";
 			Date d = DateUtil.str2Date(p, CTool.replace(strDate, "T", " "));
 			strReturn = DateUtil.date2Str("EEE d-MMM hh:mm aaa", d);
 
 		} catch (Exception e) {
 			return strReturn;
 		}
 		return strReturn;
 	}
 
 	/**
 	 *得到格式化后的指定日期
 	 *@param strScheme 格式模式字符串
 	 *@param date 指定的日期值
 	 *@return 格式化后的指定日期，如果有异常产生，返回空串""
 	 *@see java.util.SimpleDateFormat
 	 */
 	public static final String getDateTime(Date date, String strScheme) {
 		String strReturn = null;
 		try {
 			SimpleDateFormat sdf = new SimpleDateFormat(strScheme);
 			strReturn = sdf.format(date);
 		} catch (Exception e) {
 			strReturn = "";
 		}
 
 		return strReturn;
 	}
 	/**
 	 * 获取日期
 	 * @param timeType 时间类型，譬如：Calendar.DAY_OF_YEAR
 	 * @param timenum 时间数字，譬如：-1 昨天，0 今天，1 明天
 	 * @return 日期
 	 */
 	public static final Date getDateFromNow(int timeType, int timenum){
 		Calendar cld = Calendar.getInstance();
 		cld.set(timeType, cld.get(timeType) + timenum);
 		return cld.getTime();
 	}
 	/**
 	 * 获取日期
 	 * @param timeType 时间类型，譬如：Calendar.DAY_OF_YEAR
 	 * @param timenum 时间数字，譬如：-1 昨天，0 今天，1 明天
 	 * @param format_string 时间格式，譬如："yyyy-MM-dd HH:mm:ss"
 	 * @return 字符串
 	 */
 	public static final String getDateFromNow(int timeType, int timenum, String format_string){
 		if ((format_string == null)||(format_string.equals("")))
 			format_string = "yyyy-MM-dd HH:mm:ss";
 		Calendar cld = Calendar.getInstance();
 		Date date = null;
 	 DateFormat df = new SimpleDateFormat(format_string);
 		cld.set(timeType, cld.get(timeType) + timenum);
 	 date = cld.getTime();
 	 return df.format(date);
 	}
 	/**
 	 * 获取当前日期的字符串
 	 * @param format_string 时间格式，譬如："yyyy-MM-dd HH:mm:ss"
 	 * @return 字符串
 	 */
 	public static final String getDateNow(String format_string){
 		if ((format_string == null)||(format_string.equals("")))
 			format_string = "yyyy-MM-dd HH:mm:ss";
 		Calendar cld = Calendar.getInstance();
 	 DateFormat df = new SimpleDateFormat(format_string);
 	 return df.format(cld.getTime());
 	}
 
 }