java时间处理工具类[Java编程]

1 import java.io.PrintStream;
2 import java.sql.Time;
3 import java.sql.Timestamp;
4 import java.text.ParsePosition;
5 import java.text.SimpleDateFormat;
6 import java.util.Date;
7 public class TimeUtil
8 {
9 /*
10 * java编程
11 */
12 public TimeUtil()
13 {
14 }
15 public static Date strToDate(String sStr)
16 {
17 if (sStr == null)
18 return null;
19 SimpleDateFormat formatter;
20 if (sStr.length() == 19)
21 formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
22 else
23 if (sStr.length() == 10)
24 formatter = new SimpleDateFormat("yyyy-MM-dd");
25 else
26 if (sStr.length() == 8)
27 formatter = new SimpleDateFormat("yyyyMMdd");
28 else
29 if (sStr.length() == 14)
30 formatter = new SimpleDateFormat("yyyyMMddHHmmss");
31 else
32 formatter = new SimpleDateFormat("yyyyMMddHHmmss");
33 ParsePosition pos = new ParsePosition(0);
34 return formatter.parse(sStr, pos);
35 }
36 public static Timestamp strToDatetime(String s)
37 {
38 return new Timestamp(strToDate(s).getTime());
39 }
40 public static String datetimeToChinese(Date dtSource)
41 {
42 SimpleDateFormat formatter = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
43 return formatter.format(dtSource);
44 }
45 public static String dateToStr(Date date)
46 {
47 SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
48 return format.format(date);
49 }
50 public static String datetimeToStr(Date date)
51 {
52 if (date == null)
53 {
54 return "";
55 } else
56 {
57 SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
58 return formatter.format(date);
59 }
60 }
61 public static String today()
62 {
63 return dateToStr(new Date());
64 }
65 public static String now()
66 {
67 return datetimeToStr(new Date());
68 }
69 public static String calcTime(String time, int diffYear, int diffMonth, int diffDate, int diffHour, int diffMinute, int diffSecond)
70 {
71 Timestamp timestamp = strToDatetime(time);
72 timestamp.setYear(timestamp.getYear() + diffYear);
73 timestamp.setMonth(timestamp.getMonth() + diffMonth);
74 timestamp.setDate(timestamp.getDate() + diffDate);
75 timestamp.setHours(timestamp.getHours() + diffHour);
76 timestamp.setMinutes(timestamp.getMinutes() + diffMinute);
77 timestamp.setSeconds(timestamp.getSeconds() + diffSecond);
78 return datetimeToStr(timestamp);
79 }
80 public static String getCurrentTime()
81 {
82 String s = (new Time(System.currentTimeMillis())).toString();
83 return s;
84 }
85 public static String getCurrentDate()
86 {
87 String s = (new java.sql.Date(System.currentTimeMillis())).toString();
88 return s;
89 }
90 public static String getCurrentNow()
91 {
92 String s = getCurrentDate() + " " + getCurrentTime();
93 return s;
94 }
95 public static String dateFromStr(String date)
96 {
97 if (date == null || date.length() < 10)
98 return getCurrentDate();
99 else
100 return date.substring(0, 10);
101 }
102 public static String timeFromStr(String date)
103 {
104 if (date == null || date.length() < 19)
105 return "00:00:00";
106 else
107 return date.substring(11, 19);
108 }
109 public static void main(String args[])
110 {
111 System.out.println(now());
112 }
113 }