java日期转化工具类

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package com.rest.ful.utils;import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;/*** 日期工具类* @author zlzhaoe* @version [版本号, 2017-5-10下午3:02:08 ]* @see [相关类/方法]* @since [产品/模块版本]*/
public class DateUtils
{private static final String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";private static final String DATETIME_PATTERN_NO_MSE = "yyyy-MM-dd HH:mm";private static final String DATETIME_PAT = "yyyy-MM-dd";/*** 日期转为字符串** @param value* @return yyyy-MM-dd HH:mm:ss*/public static String doConvertToString(Object value){SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATETIME_PATTERN);String result = null;if (value instanceof Date){result = simpleDateFormat.format(value);}return result;}/*** 日期转为字符串** @param value* @return yyyy-MM-dd*/public static String convertToString(Object value){SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATETIME_PAT);String result = null;if (value instanceof Date){result = simpleDateFormat.format(value);}return result;}/*** 比较是否滞后于系统时间** @param value* @return*/public static boolean afterToSystemDate(Object value){boolean result = false;SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATETIME_PATTERN_NO_MSE);Date date = null;try{date = simpleDateFormat.parse((String)value);}catch (ParseException e){e.printStackTrace();}result = date.after(new Date());return result;}public static boolean afterToSysDateInterval(String value, int minutes){java.util.Date date = null;date = new Date(Long.valueOf(value));java.util.Date sysDate = new Date();long between = (sysDate.getTime() - date.getTime()) / 1000;// 除以1000是为了转换成秒return between > minutes;}/*** 获取当前时间的毫秒数* * @return*/public static String getCurrentTimeMillis(){return System.currentTimeMillis() + "";}/*** 获得指定日期的前一天* * @param specifiedDay* @return* @throws Exception*/public static Date getSpecifiedDayBefore(Date date){// 可以用new Date().toLocalString()传递参数Calendar c = Calendar.getInstance();c.setTime(date);int day = c.get(Calendar.DATE);c.set(Calendar.DATE, day - 1);return c.getTime();}/*** 两个时间之间相差距离多少天* * @param one 时间参数 1：* @param two 时间参数 2：* @return 相差天数*/public static long getDistanceDays(String str1, String str2)throws Exception{DateFormat df = new SimpleDateFormat("yyyy-MM-dd");Date one;Date two;long days = 0;try{one = df.parse(str1);two = df.parse(str2);long time1 = one.getTime();long time2 = two.getTime();long diff;if (time1 < time2){diff = time2 - time1;}else{diff = time1 - time2;}days = diff / (1000 * 60 * 60 * 24);}catch (ParseException e){e.printStackTrace();}return days;}/*** 两个时间相差距离多少天多少小时多少分多少秒* * @param str1 时间参数 1 格式：1990-01-01 12:00:00* @param str2 时间参数 2 格式：2009-01-01 12:00:00* @return long[] 返回值为：{天, 时, 分, 秒}*/public static long[] getDistanceTimes(String str1, String str2){DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date one;Date two;long day = 0;long hour = 0;long min = 0;long sec = 0;try{one = df.parse(str1);two = df.parse(str2);long time1 = one.getTime();long time2 = two.getTime();long diff;if (time1 < time2){diff = time2 - time1;}else{diff = time1 - time2;}day = diff / (24 * 60 * 60 * 1000);hour = (diff / (60 * 60 * 1000) - day * 24);min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);}catch (ParseException e){e.printStackTrace();}long[] times = {day, hour, min, sec};return times;}/*** 两个时间相差距离多少天多少小时多少分多少秒* * @param str1 时间参数 1 格式：1990-01-01 12:00:00* @param str2 时间参数 2 格式：2009-01-01 12:00:00* @return String 返回值为：xx天xx小时xx分xx秒*/public static String getDistanceTime(Date str1, Date str2){long day = 0;long hour = 0;long min = 0;long sec = 0;long time1 = str1.getTime();long time2 = str2.getTime();long diff;if (time1 < time2){diff = time2 - time1;}else{diff = time1 - time2;}// day = diff / (24 * 60 * 60 * 1000);// hour = (diff / (60 * 60 * 1000) - day * 24);// min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);return sec + "";}}

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