Long类型的时间转换成：n秒前/n分钟前/n小时前/日期

 1 import java.text.SimpleDateFormat;
 2 import java.util.Calendar;
 3 
 4 import java.text.DateFormat;
 5 
 6 import java.util.Date;
 7 
 8 /**
 9  * Created by Administrator on 2016/3/21.
10  */
11 public class LongTimeUtil {
12 
13     /**
14      * Long类型的时间转换成：n秒前/n分钟前/n小时前/日期
15      *
16      * @param time   long类型的时间
17      * @param format 很长时间前显示的日期格式
18      * @return
19      */
20     public static String dataLongToSNS(long time, String format) {
21         long now = System.currentTimeMillis();
22 
23         long diff = now - time;
24         diff = diff / 1000;// 秒
25 
26         if (diff < 0) {
27             return dateLongToString(time, format);
28         }
29 
30         if (diff < 30) { // 30秒
31             return "刚刚";
32         }
33 
34         if (diff < 60) {
35             return String.format("%s秒前", diff);
36         }
37 
38         if (diff < 3600) {
39             return String.format("%s分钟前", diff / 60);
40         }
41         //获取今天凌晨时间
42         long todayStart = getMorning(new Date()).getTime();
43 
44         if (time >= todayStart) {// 今天
45             return String.format("%s小时前", diff / 3600);
46         }
47 
48         if (time < todayStart && time >= todayStart - 86400000) {
49             return "昨天 " + dateLongToString(time, "HH:mm");
50         }
51         return dateLongToString(time, format);
52     }
53 
54     //获取今天凌晨的时间
55     private static Date getMorning(Date date) {
56         Calendar calendar = Calendar.getInstance();
57         calendar.setTime(date);
58         calendar.set(Calendar.HOUR_OF_DAY, 0);
59         calendar.set(Calendar.MINUTE, 0);
60         calendar.set(Calendar.SECOND, 0);
61         return calendar.getTime();
62     }
63 
64     public static String dateLongToString(long time) {
65         return dateLongToString(time, null);
66     }
67 
68     public static String dateLongToString(long time, String format) {
69         if (time <= 0) {
70             return "Empty";
71         }
72         DateFormat format2 = new SimpleDateFormat(format);
73         String dateString = format2.format(new Date(time * 1000));//此处一定要记得*1000 否则显示1970年的时间
74         return dateString;
75     }
76 }

上面方法有时候效果不佳，下面特意又封装一个工具类，该类使用时候需要注意要将long类型时间*1000，否则有时候会显示1970

 1 package king.timeline.com.timeline.utils;
 2 
 3 import java.text.SimpleDateFormat;
 4 import java.util.Calendar;
 5 import java.util.Date;
 6 import java.util.Locale;
 7 
 8 /**
 9  * Created by Administrator on 2016/3/21.
10  */
11 public class MyTimeUtil {
12     public static String getTime(long time) {
13         Calendar newCalendar = Calendar.getInstance();
14         Calendar oldCalendar = Calendar.getInstance();
15         oldCalendar.setTime(new Date(time));
16         if (newCalendar.get(Calendar.YEAR) > oldCalendar.get(Calendar.YEAR)) {
17             return getFormatTime(time);
18         } else if (newCalendar.get(Calendar.MONTH) > oldCalendar.get(Calendar.MONTH)) {
19             return (newCalendar.get(Calendar.MONTH) - oldCalendar.get(Calendar.MONTH)) + "月前";
20         } else if (newCalendar.get(Calendar.DAY_OF_MONTH) > oldCalendar.get(Calendar.DAY_OF_MONTH)) {
21             return (newCalendar.get(Calendar.DAY_OF_MONTH) - oldCalendar.get(Calendar.DAY_OF_MONTH)) + "天前";
22         } else if (newCalendar.get(Calendar.HOUR) > oldCalendar.get(Calendar.HOUR)) {
23             return (newCalendar.get(Calendar.HOUR) - oldCalendar.get(Calendar.HOUR)) + "小时前";
24         } else if (newCalendar.get(Calendar.MINUTE) > oldCalendar.get(Calendar.MINUTE)) {
25             return (newCalendar.get(Calendar.MINUTE) - oldCalendar.get(Calendar.MINUTE)) + "分钟前";
26         } else {
27             return "刚刚";
28         }
29     }
30 
31     private static String getFormatTime(long time) {
32         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
33         return sdf.format(new Date(time));
34     }
35 }

转自：https://blog.csdn.net/iblade/article/details/50947939

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