Java时间处理 将时间戳转换为“几天前”的格式 

Java时间处理  将时间戳转换为“几天前”的格式

做项目的时候，我们经常会遇到将数据库生成的long型类似1335189486形式的时间戳和当前时间对比，显示为新浪微博中显示的“几天前”，“几秒前”的格式，以下是解决方法。闲话少活，先上代码：
 1 /**
 2  * project : Test
 3  *
 4  *
 5  *===========================================================
 6  * amend date        amend user        amend reason
 7  * 2012-4-28         Zhang Xiaowen        create this file
 8  */
 9 
10 /**
11  * @file_name     Test.java
12  * 
13  * @author     Zhang Xiaowen(zxw.wen@gmail.com)
14  * @create     2012-4-28
15  * @TODO
16  */
17 import java.sql.Timestamp;
18 import java.text.ParseException;
19 import java.text.SimpleDateFormat;
20 import java.util.Calendar;
21 import java.util.Date;
22 
23 public class Test {
24 
25     public static Date getDateByString(String time) {
26         Date date = null;
27         if (time == null)
28             return date;
29         String date_format = "yyyy-MM-dd HH:mm:ss";
30         SimpleDateFormat format = new SimpleDateFormat(date_format);
31         try {
32             date = format.parse(time);
33         } catch (ParseException e) {
34             e.printStackTrace();
35         }
36         return date;
37     }
38 
39     public static String getShortTime(long dateline) {
40         String shortstring = null;
41         String time = timestampToStr(dateline);
42         Date date = getDateByString(time);
43         if(date == null) return shortstring;
44         
45         long now = Calendar.getInstance().getTimeInMillis();
46         long deltime = (now - date.getTime())/1000;
47         if(deltime > 365*24*60*60) {
48             shortstring = (int)(deltime/(365*24*60*60)) + "年前";
49         } else if(deltime > 24*60*60) {
50             shortstring = (int)(deltime/(24*60*60)) + "天前";
51         } else if(deltime > 60*60) {
52             shortstring = (int)(deltime/(60*60)) + "小时前";
53         } else if(deltime > 60) {
54             shortstring = (int)(deltime/(60)) + "分前";
55         } else if(deltime > 1) {
56             shortstring = deltime + "秒前";
57         } else {
58             shortstring = "1秒前";
59         }
60         return shortstring;
61     }
62 
63     //Timestamp转化为String:
64     public static String timestampToStr(long dateline){
65         Timestamp timestamp = new Timestamp(dateline*1000);
66         SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//定义格式，不显示毫秒
67        return df.format(timestamp);
68     }
69     
70     
71     public static void main(String[] args) {
72         long dateline = 1335189486;
73         System.out.println(getShortTime(dateline));
74 //        String time = "2012-04-20 10:40:55";
75 //        System.out.println(getShortTime(time));
76     }
77 
78 }

运行结果，输出：

  5天前

posted @ 2012-04-29 21:06  Wone  阅读(4002)  评论(0)  编辑  收藏  举报