SimpleDateFormat格式化日期以及日期的相关操作

 1 import java.util.*;
 2 import java.text.SimpleDateFormat;
 3 
 4 /**
 5 * Created by IntelliJ IDEA.
 6 * User: leizhimin
 7 * Date: 2007-11-30
 8 * Time: 15:06:57
 9 * Calendar的使用测试
10 */
11 public class TestCalendar {
12     public static void main(String args[]) {
13         TestCalendar testCalendar = new TestCalendar();
14         testCalendar.testCalendar();
15 
16     }
17 
18     public void testCalendar() {
19         //创建Calendar的方式
20         Calendar now1 = Calendar.getInstance();
21         Calendar now2 = new GregorianCalendar();
22         Calendar now3 = new GregorianCalendar(2007, 10, 30);
23         Calendar now4 = new GregorianCalendar(2007, 10, 30, 15, 55);      //陷阱:Calendar的月份是0~11
24         Calendar now5 = new GregorianCalendar(2007, 10, 30, 15, 55, 44);
25         Calendar now6 = new GregorianCalendar(Locale.US);
26         Calendar now7 = new GregorianCalendar(TimeZone.getTimeZone("GMT-8:00"));
27 
28         //通过日期和毫秒数设置Calendar
29         now2.setTime(new Date());
30         System.out.println(now2);
31 
32         now2.setTimeInMillis(new Date().getTime());
33         System.out.println(now2);
34 
35 
36         //定义日期的中文输出格式,并输出日期
37         SimpleDateFormat df = new SimpleDateFormat("yyyy年MM月dd日 hh时mm分ss秒 E", Locale.CHINA);
38         System.out.println("获取日期中文格式化化输出：" + df.format(now5.getTime()));
39         System.out.println();
40 
41         System.out.println("--------通过Calendar获取日期中年月日等相关信息--------");
42         System.out.println("获取年：" + now5.get(Calendar.YEAR));
43         System.out.println("获取月(月份是从0开始的)：" + now5.get(Calendar.MONTH));
44         System.out.println("获取日：" + now5.get(Calendar.DAY_OF_MONTH));
45         System.out.println("获取时：" + now5.get(Calendar.HOUR));
46         System.out.println("获取分：" + now5.get(Calendar.MINUTE));
47         System.out.println("获取秒：" + now5.get(Calendar.SECOND));
48         System.out.println("获取上午、下午：" + now5.get(Calendar.AM_PM));
49         System.out.println("获取星期数值(星期是从周日开始的)：" + now5.get(Calendar.DAY_OF_WEEK));
50         System.out.println();
51 
52         System.out.println("---------通用星期中文化转换---------");
53         String dayOfWeek[] = {"", "日", "一", "二", "三", "四", "五", "六"};
54         System.out.println("now5对象的星期是:" + dayOfWeek[now5.get(Calendar.DAY_OF_WEEK)]);
55         System.out.println();
56 
57         System.out.println("---------通用月份中文化转换---------");
58         String months[] = {"一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"};
59         System.out.println("now5对象的月份是: " + months[now5.get(Calendar.MONTH)]);
60     }
61 }

 1 java.util.GregorianCalendar[time=1196414388324,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Shanghai",offset=28800000,dstSavings=0,useDaylight=false,transitions=19,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2007,MONTH=10,WEEK_OF_YEAR=48,WEEK_OF_MONTH=5,DAY_OF_MONTH=30,DAY_OF_YEAR=334,DAY_OF_WEEK=6,DAY_OF_WEEK_IN_MONTH=5,AM_PM=1,HOUR=5,HOUR_OF_DAY=17,MINUTE=19,SECOND=48,MILLISECOND=324,ZONE_OFFSET=28800000,DST_OFFSET=0]
 2 java.util.GregorianCalendar[time=1196414388324,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Shanghai",offset=28800000,dstSavings=0,useDaylight=false,transitions=19,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2007,MONTH=10,WEEK_OF_YEAR=48,WEEK_OF_MONTH=5,DAY_OF_MONTH=30,DAY_OF_YEAR=334,DAY_OF_WEEK=6,DAY_OF_WEEK_IN_MONTH=5,AM_PM=1,HOUR=5,HOUR_OF_DAY=17,MINUTE=19,SECOND=48,MILLISECOND=324,ZONE_OFFSET=28800000,DST_OFFSET=0]
 3 获取日期中文格式化化输出：2007年11月30日 03时55分44秒 星期五
 4 
 5 --------通过Calendar获取日期中年月日等相关信息--------
 6 获取年：2007
 7 获取月(月份是从0开始的)：10
 8 获取日：30
 9 获取时：3
10 获取分：55
11 获取秒：44
12 获取上午、下午：1
13 获取星期数值(星期是从周日开始的)：6
14 
15 ---------通用星期中文化转换---------
16 now5对象的星期是:五
17 
18 ---------通用月份中文化转换---------
19 now5对象的月份是: 十一月
20 
21 Process finished with exit code 0