分享一下我老师大神的人工智能教程！零基础，通俗易懂！http://blog.csdn.net/jiangjunshow
也欢迎大家转载本篇文章。分享知识，造福人民，实现我们中华民族伟大复兴！
代码下载：http://www.zuidaima.com/share/1562038902000640.htm
在stackoverflow上找了一个简单的，改写了下符合需求，给大家分享下。
package com.zuidaima;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class RelativeDateFormat { private static final long ONE_MINUTE = 60000L; private static final long ONE_HOUR = 3600000L; private static final long ONE_DAY = 86400000L; private static final long ONE_WEEK = 604800000L; private static final String ONE_SECOND_AGO = "秒前"; private static final String ONE_MINUTE_AGO = "分钟前"; private static final String ONE_HOUR_AGO = "小时前"; private static final String ONE_DAY_AGO = "天前"; private static final String ONE_MONTH_AGO = "月前"; private static final String ONE_YEAR_AGO = "年前"; public static void main(String[] args) throws ParseException { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:m:s"); Date date = format.parse("2013-11-11 18:35:35"); System.out.println(format(date)); } public static String format(Date date) { long delta = new Date().getTime() - date.getTime(); if (delta < 1L * ONE_MINUTE) { long seconds = toSeconds(delta); return (seconds <= 0 ? 1 : seconds) + ONE_SECOND_AGO; } if (delta < 45L * ONE_MINUTE) { long minutes = toMinutes(delta); return (minutes <= 0 ? 1 : minutes) + ONE_MINUTE_AGO; } if (delta < 24L * ONE_HOUR) { long hours = toHours(delta); return (hours <= 0 ? 1 : hours) + ONE_HOUR_AGO; } if (delta < 48L * ONE_HOUR) { return "昨天"; } if (delta < 30L * ONE_DAY) { long days = toDays(delta); return (days <= 0 ? 1 : days) + ONE_DAY_AGO; } if (delta < 12L * 4L * ONE_WEEK) { long months = toMonths(delta); return (months <= 0 ? 1 : months) + ONE_MONTH_AGO; } else { long years = toYears(delta); return (years <= 0 ? 1 : years) + ONE_YEAR_AGO; } } private static long toSeconds(long date) { return date / 1000L; } private static long toMinutes(long date) { return toSeconds(date) / 60L; } private static long toHours(long date) { return toMinutes(date) / 60L; } private static long toDays(long date) { return toHours(date) / 24L; } private static long toMonths(long date) { return toDays(date) / 30L; } private static long toYears(long date) { return toMonths(date) / 365L; }}需要的可以下载，可以自己修改测试代码测试。