顯示樣例如下：

程式碼如下：

package utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class TimeUtil {
	static SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

	
	/**
	 * 24小時制轉化成12小時制
	 * 
	 * @param strDay
	 */
	public static String timeFormatStr(Calendar calendar, String strDay) {
		String tempStr = "";
		int hour = calendar.get(Calendar.HOUR_OF_DAY);
		if (hour > 11) {
			tempStr = "下午" + " " + strDay;
		} else {
			tempStr = "上午" + " " + strDay;
		}
		return tempStr;
	}

	/**
	 * 時間轉化為星期
	 * 
	 * @param indexOfWeek
	 *            星期的第幾天
	 */
	public static String getWeekDayStr(int indexOfWeek) {
		String weekDayStr = "";
		switch (indexOfWeek) {
		case 1:
			weekDayStr = "星期日";
			break;
		case 2:
			weekDayStr = "星期一";
			break;
		case 3:
			weekDayStr = "星期二";
			break;
		case 4:
			weekDayStr = "星期三";
			break;
		case 5:
			weekDayStr = "星期四";
			break;
		case 6:
			weekDayStr = "星期五";
			break;
		case 7:
			weekDayStr = "星期六";
			break;
		}
		return weekDayStr;
	}

	/**
	 * 將時間戳格式化，13位的轉為10位
	 * 
	 * @param timestamp
	 * @return
	 */
	public static long timestampFormate(long timestamp) {
		String timestampStr = timestamp + "";
		if (timestampStr.length() == 13) {
			timestamp = timestamp / 1000;
		}
		return timestamp;
	}

	/**
	 * 獲取日起時間秒差
	 *
	 * @param time
	 *            需要格式化的時間 如"2014-07-14 19:01:45"
	 * @param pattern
	 *            輸入引數time的時間格式 如:"yyyy-MM-dd HH:mm:ss"
	 *            <p/>
	 *            如果為空則預設使用"yyyy-MM-dd HH:mm:ss"格式
	 * @return time為null，或者時間格式不匹配，輸出空字元""
	 * @throws ParseException
	 */
	public static long formatLongTime(String time, String pattern) {
		long dTime = 0;
		if (time != null) {
			if (pattern == null)
				pattern = "yyyy-MM-dd HH:mm:ss";
			Date tDate;
			try {
				tDate = new SimpleDateFormat(pattern).parse(time);
				Date today = new Date();
				if (tDate != null) {
					dTime = (today.getTime() - tDate.getTime()) / 1000;
				}
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}
		return dTime;
	}

	/**
	 * 獲取日期時間戳
	 *
	 * @param time
	 *            需要格式化的時間 如"2014-07-14 19:01:45"
	 * @param pattern
	 *            輸入引數time的時間格式 如:"yyyy-MM-dd HH:mm:ss"
	 *            <p/>
	 *            如果為空則預設使用"yyyy-MM-dd HH:mm:ss"格式
	 * @return time為null，或者時間格式不匹配，輸出空字元""
	 * @throws ParseException
	 */
	public static long timeStamp(String time, String pattern) {
		long dTime = 0;
		if (time != null) {
			if (pattern == null)
				pattern = "yyyy-MM-dd HH:mm:ss";
			Date tDate;
			try {
				tDate = new SimpleDateFormat(pattern).parse(time);
				if (tDate != null) {
					dTime = tDate.getTime() / 1000;
				}
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}
		return dTime;
	}

	/**
	 * 時間轉化為顯示字串
	 * 
	 * @param timeStamp
	 *            單位為秒
	 */
	public static String getTimeStr(long timeStamp) {
		if (timeStamp == 0)
			return "";
		Calendar inputTime = Calendar.getInstance();
		inputTime.setTimeInMillis(timeStamp * 1000);
		Date currenTimeZone = inputTime.getTime();
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.HOUR_OF_DAY, 23);
		calendar.set(Calendar.MINUTE, 59);
		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		if (calendar.before(inputTime)) {
			SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
			return sdf.format(currenTimeZone);
		}
		calendar.add(Calendar.DAY_OF_MONTH, -1);
		if (calendar.before(inputTime)) {
			return "昨天";
		} else {
			calendar.add(Calendar.DAY_OF_MONTH, -5);
			if (calendar.before(inputTime)) {
				return getWeekDayStr(inputTime.get(Calendar.DAY_OF_WEEK));
			} else {
				calendar.set(Calendar.DAY_OF_MONTH, 1);
				calendar.set(Calendar.MONTH, Calendar.JANUARY);
				int year = inputTime.get(Calendar.YEAR);
				int month = inputTime.get(Calendar.MONTH);
				int day = inputTime.get(Calendar.DAY_OF_MONTH);
				return year + "/" + month + "/" + day;
			}

		}

	}

	
	/**
	 * 時間轉化為聊天介面顯示字串
	 * 
	 * @param timeStamp
	 *            單位為秒
	 */
	public static String getChatTimeStr(long timeStamp) {
		if (timeStamp == 0)
			return "";
		Calendar inputTime = Calendar.getInstance();
		String timeStr = timeStamp + "";
		if (timeStr.length() == 10) {
			timeStamp = timeStamp * 1000;
		}
		inputTime.setTimeInMillis(timeStamp);
		Date currenTimeZone = inputTime.getTime();
		Calendar calendar = Calendar.getInstance();
		// if (calendar.before(inputTime)){
		// //當前時間在輸入時間之前
		// SimpleDateFormat sdf = new SimpleDateFormat("yyyy" +
		// "年"+"MM"+"月"+"dd"+"日");
		// return sdf.format(currenTimeZone);
		// }
		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		if (calendar.before(inputTime)) {
			SimpleDateFormat sdf = new SimpleDateFormat("h:mm");
			return timeFormatStr(inputTime, sdf.format(currenTimeZone));
		}
		calendar.add(Calendar.DAY_OF_MONTH, -1);
		if (calendar.before(inputTime)) {
			SimpleDateFormat sdf = new SimpleDateFormat("h:mm");
			return "昨天" + " " + timeFormatStr(inputTime, sdf.format(currenTimeZone));
		} else {
			calendar.set(Calendar.DAY_OF_MONTH, 1);
			calendar.set(Calendar.MONTH, Calendar.JANUARY);
			if (calendar.before(inputTime)) {
				SimpleDateFormat sdf = new SimpleDateFormat("M" + "月" + "d" + "日");
				String temp1 = sdf.format(currenTimeZone);
				SimpleDateFormat sdf1 = new SimpleDateFormat("h:mm");
				String temp2 = timeFormatStr(inputTime, sdf1.format(currenTimeZone));
				return temp1 + temp2;
			} else {
				SimpleDateFormat sdf = new SimpleDateFormat("yyyy" + "/" + "M" + "/" + "d" + " ");
				String temp1 = sdf.format(currenTimeZone);
				SimpleDateFormat sdf1 = new SimpleDateFormat("h:mm");
				String temp2 = timeFormatStr(inputTime, sdf1.format(currenTimeZone));
				return temp1 + temp2;
			}

		}

	}

	/**
	 * 群發使用的時間轉換
	 */
	public static String multiSendTimeToStr(long timeStamp) {

		if (timeStamp == 0)
			return "";
		Calendar inputTime = Calendar.getInstance();
		String timeStr = timeStamp + "";
		if (timeStr.length() == 10) {
			timeStamp = timeStamp * 1000;
		}
		inputTime.setTimeInMillis(timeStamp);
		Date currenTimeZone = inputTime.getTime();
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.HOUR_OF_DAY, 0);
		calendar.set(Calendar.MINUTE, 0);
		calendar.set(Calendar.SECOND, 0);
		calendar.set(Calendar.MILLISECOND, 0);
		if (calendar.before(inputTime)) {
			SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
			return sdf.format(currenTimeZone);
		}
		calendar.add(Calendar.DAY_OF_MONTH, -1);
		if (calendar.before(inputTime)) {
			@SuppressWarnings("unused")
			SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
			return "昨天";
		} else {
			calendar.add(Calendar.DAY_OF_MONTH, -5);
			if (calendar.before(inputTime)) {
				return getWeekDayStr(inputTime.get(Calendar.DAY_OF_WEEK));
			} else {
				calendar.set(Calendar.DAY_OF_MONTH, 1);
				calendar.set(Calendar.MONTH, Calendar.JANUARY);
				if (calendar.before(inputTime)) {
					SimpleDateFormat sdf = new SimpleDateFormat("M" + "/" + "d" + " ");
					String temp1 = sdf.format(currenTimeZone);
					SimpleDateFormat sdf1 = new SimpleDateFormat("HH:mm");
					String temp2 = sdf1.format(currenTimeZone);
					return temp1 + temp2;
				} else {
					SimpleDateFormat sdf = new SimpleDateFormat("yyyy" + "/" + "M" + "/" + "d" + " ");
					String temp1 = sdf.format(currenTimeZone);
					SimpleDateFormat sdf1 = new SimpleDateFormat("HH:mm");
					String temp2 = sdf1.format(currenTimeZone);
					return temp1 + temp2;
				}
			}
		}
	}

	/**
	 * 格式化時間（輸出類似於 剛剛, 4分鐘前, 一小時前, 昨天這樣的時間）
	 *
	 * @param time
	 *            需要格式化的時間 如"2014-07-14 19:01:45"
	 * @param pattern
	 *            輸入引數time的時間格式 如:"yyyy-MM-dd HH:mm:ss"
	 *            <p/>
	 *            如果為空則預設使用"yyyy-MM-dd HH:mm:ss"格式
	 * @return time為null，或者時間格式不匹配，輸出空字元""
	 */
	public static String formatDisplayTime(String time, String pattern) {
		String display = "";
		int tMin = 60 * 1000;
		int tHour = 60 * tMin;
		int tDay = 24 * tHour;

		if (time != null) {
			if (pattern == null)
				pattern = "yyyy-MM-dd HH:mm:ss";
			try {
				Date tDate = new SimpleDateFormat(pattern).parse(time);
				Date today = new Date();
				SimpleDateFormat thisYearDf = new SimpleDateFormat("yyyy");
				SimpleDateFormat todayDf = new SimpleDateFormat("yyyy-MM-dd");
				Date thisYear = new Date(thisYearDf.parse(thisYearDf.format(today)).getTime());
				Date yesterday = new Date(todayDf.parse(todayDf.format(today)).getTime());
				Date beforeYes = new Date(yesterday.getTime() - tDay);
				if (tDate != null) {
					@SuppressWarnings("unused")
					SimpleDateFormat halfDf = new SimpleDateFormat("MM月dd日");
					long dTime = today.getTime() - tDate.getTime();
					if (tDate.before(thisYear)) {
						display = new SimpleDateFormat("yyyy年MM月dd日").format(tDate);
					} else {

						if (dTime < tMin) {
							display = "剛剛";
						} else if (dTime < tHour) {
							display = (int) Math.ceil(dTime / tMin) + "分鐘前";
						} else if (dTime < tDay && tDate.after(yesterday)) {
							display = (int) Math.ceil(dTime / tHour) + "小時前";
						} else if (tDate.after(beforeYes) && tDate.before(yesterday)) {
							display = "昨天  " + new SimpleDateFormat("HH:mm").format(tDate);
						} else {
							display = multiSendTimeToStr(tDate.getTime() / 1000);
						}
					}
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		return display;
	}

	public static void main(String[] args) {
		//TODO 當前時間
		System.out.println(sf.format(new Date()));
		// TODO 字傳入時間日期字串轉換群發使用時間輸出
		System.out.println(formatDisplayTime("2017-06-30 10:34:00", null));
		// TODO 先 轉換成時間戳 轉換成對應的時間輸出格式
		long timeStamp = timeStamp("2017-06-29 10:34:00", null);
		System.out.println(multiSendTimeToStr(timeStamp));//群發使用時間
		System.out.println(getChatTimeStr(timeStamp));//時間轉化為聊天介面顯示字串
		System.out.println(getTimeStr(timeStamp));//時間轉化為顯示字串
		
	}

}