long类型的时间转为n秒前n分钟前n小时前或者日期

 1 package com.tai.use;
 2 
 3 import java.text.DateFormat;
 4 import java.text.SimpleDateFormat;
 5 import java.util.Calendar;
 6 import java.util.Date;
 7 
 8 public class GuiYI
 9 {
10     /**
11      * GuiYI 诡异的需求
12      * 转为 n秒前   n分钟前   n小时前  日期
13      * @param time
14      * @param format  很长时间前显示的日期格式
15      * @return
16      */
17         public static String dataLongToSNS(long time,String format){
18             long now = System.currentTimeMillis();
19             
20             long diff = now -time;
21             diff = diff/1000;// 秒
22             
23             if(diff<0){
24                 return dateLongToString(time,format);
25             }
26             
27             if(diff<30){ // 30秒
28                 return "刚刚";
29             }
30             
31             if(diff<60){
32                 return String.format("%s秒前", diff);
33             }
34             
35             if(diff<3600){
36                 return String.format("%s分钟前", diff/60);
37             }
38             //获取今天凌晨时间
39             long todayStart = getMoring(new Date()).getTime();
40             
41             if(time>=todayStart){// 今天
42                 return String.format("%s小时前", diff/3600);
43             }
44             
45             if(time<todayStart && time >= todayStart-86400000){
46                 return "昨天 " + dateLongToString(time, "HH:mm");
47             }
48             
49             return dateLongToString(time,format);
50         }
51         //获取今天凌晨的时间
52         private static Date getMoring(Date date)
53         {
54             Calendar calendar  = Calendar.getInstance();
55             calendar.setTime(date);
56             calendar.set(Calendar.HOUR_OF_DAY, 0);
57             calendar.set(Calendar.MINUTE, 0);
58             calendar.set(Calendar.SECOND, 0);
59             return calendar.getTime();
60         }
61         public static String dateLongToString(long time){
62             return dateLongToString(time,null);
63         }
64         public static String dateLongToString(long time,String format){
65             if(time<=0){
66                 return "Empty";
67             }
68             DateFormat format2 = new SimpleDateFormat(format);
69             String dateString = format2.format(new Date(time));
70             return dateString;
71         }
72         
73         public static void main(String[] args)
74         {
75             System.out.println(dataLongToSNS(1400837178603L,"yyyy-MM-dd HH:mm:ss"));
76         }
77 }