JodaTime初体验

前段时间用JDK自带的Calendar类来处理日期，需要获取年、季，月，星期的起始日期，被折腾得要死要活。看了这篇文章 http://www.blogbus.com/dreamhead-logs/226738702.html 后，决定使用JodaTime重新写一下这个功能。

关于JodaTime可以看这篇文章：http://www.ibm.com/developerworks/cn/java/j-jodatime.html

废话不多说，直接贴代码。

 1 import java.util.Date;
 2 
 3 import org.joda.time.DateTime;
 4 
 5 public class JodaDemo {
 6     public static final int PERIOD_TYPE_YEAR = 0;
 7 
 8     public static final int PERIOD_TYPE_MONTH = 1;
 9 
10     public static final int PERIOD_TYPE_HALFMONTH = 2;
11 
12     public static final int PERIOD_TYPE_WEEK = 3;
13 
14     public static final int PERIOD_TYPE_BIWEEK = 4;
15 
16     public static final int PERIOD_TYPE_QUARTER = 5;
17 
18     /**
19      * 根据type获取日期期间 type为月的话 则返回月初与月末两个Date
20      * 
21      * @param currentDate
22      * @param type
23      * @return
24      */
25     public static Date[] getPeriodByType(Date currentDate, int type) {
26 
27         DateTime date = new DateTime(currentDate);
28         Date fromDate = currentDate;
29         Date toDate = currentDate;
30 
31         switch (type) {
32         case PERIOD_TYPE_YEAR:
33             fromDate = date.dayOfYear().withMinimumValue().toDate();
34             toDate = date.dayOfYear().withMaximumValue().toDate();
35             break;
36 
37         case PERIOD_TYPE_QUARTER:
38             int month = date.getMonthOfYear();
39             month = (month - 1) % 3;
40             date = date.plusMonths(-month);
41             fromDate = date.dayOfMonth().withMinimumValue().toDate();
42             date = date.plusMonths(2);
43             toDate = date.dayOfMonth().withMaximumValue().toDate();
44             break;
45 
46         case PERIOD_TYPE_MONTH:
47             fromDate = date.dayOfMonth().withMinimumValue().toDate();
48             toDate = date.dayOfMonth().withMaximumValue().toDate();
49             break;
50 
51         case PERIOD_TYPE_WEEK:
52             fromDate = date.dayOfWeek().withMinimumValue().toDate();
53             toDate = date.dayOfWeek().withMaximumValue().toDate();
54 
55             break;
56 
57         case PERIOD_TYPE_BIWEEK:
58             fromDate = date.dayOfYear().withMinimumValue().toDate();
59             toDate = date.dayOfYear().withMaximumValue().toDate();
60             break;
61 
62         case PERIOD_TYPE_HALFMONTH:
63 
64             fromDate = date.dayOfYear().withMinimumValue().toDate();
65             toDate = date.dayOfYear().withMaximumValue().toDate();
66 
67             break;
68 
69         default:
70             break;
71         }
72 
73         Date[] period = new Date[2];
74         period[0] = fromDate;
75         period[1] = toDate;
76         return period;
77     }
78 }

View Code

然后写测试：

 1 import static org.junit.Assert.*;
 2 
 3 import java.util.Date;
 4 
 5 import org.joda.time.DateTime;
 6 import org.junit.Test;
 7 
 8 
 9 public class JodaDemoTest {
10     public static String dateFormat = "yyyy-MM-dd";
11     @Test
12     public void testGetPeriodByType() {
13         DateTime dateTime = new DateTime("2013-12-26");
14         Date[] weeks = JodaDemo.getPeriodByType(dateTime.toDate(), JodaDemo.PERIOD_TYPE_WEEK);
15         assertEquals("2013-12-23", new DateTime(weeks[0]).toString(dateFormat));
16         assertEquals("2013-12-29", new DateTime(weeks[1]).toString(dateFormat));
17         
18 //        Date[] biWeek = JodaDemo.getPeriodByType(dateTime.toDate(), JodaDemo.PERIOD_TYPE_BIWEEK);
19 //        assertEquals("2013-12-01", new DateTime(biWeek[0]).toString(dateFormat));
20 //        assertEquals("2013-12-31", new DateTime(biWeek[1]).toString(dateFormat));
21         
22         Date[] months = JodaDemo.getPeriodByType(dateTime.toDate(), JodaDemo.PERIOD_TYPE_MONTH);
23         assertEquals("2013-12-01", new DateTime(months[0]).toString(dateFormat));
24         assertEquals("2013-12-31", new DateTime(months[1]).toString(dateFormat));
25         
26         Date[] quarters = JodaDemo.getPeriodByType(dateTime.toDate(), JodaDemo.PERIOD_TYPE_QUARTER);
27         assertEquals("2013-10-01", new DateTime(quarters[0]).toString(dateFormat));
28         assertEquals("2013-12-31", new DateTime(quarters[1]).toString(dateFormat));
29         
30         Date[] years = JodaDemo.getPeriodByType(dateTime.toDate(), JodaDemo.PERIOD_TYPE_YEAR);
31         assertEquals("2013-01-01", new DateTime(years[0]).toString(dateFormat));
32         assertEquals("2013-12-31", new DateTime(years[1]).toString(dateFormat));
33     }
34 
35 }

View Code

测试通过：

注：按两周BIWEEK分割和按半个月HALFMONTH分割的功能还没完善。

使用Joda果然简单了很多，接下来有空可以看看源码，再深入理解一下。