使用Calendar 获取日期和时间的问题
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开始使用new Date()测试,并用通过date.getMonth(),和date.getDay()获取,不过后来发现这两个访求是jdk1.1版本的,现在已经不用了,而且结果也不正确.
获取当前的月份和日期
试了一下,果然正确
后来查看java doc文档,MONTH字段解释如下
Field number for get
and set
indicating the month. This is a calendar-specific value. The first month of the year is JANUARY
which is 0; the last depends on the number of months in a year.
这个字段的值只是说明get()的属性字段值,来获取month的
以下为获取其它:
Calendar CD = Calendar.getInstance(); int YY = CD.get(Calendar.YEAR) ; int MM = CD.get(Calendar.MONTH)+1; int DD = CD.get(Calendar.DATE); int HH = CD.get(Calendar.HOUR); int NN = CD.get(Calendar.MINUTE); int SS = CD.get(Calendar.SECOND); int MI = CD.get(Calendar.MILLISECOND);
Calendar cal = Calendar.getInstance();
//当前年 int year = cal.get(Calendar.YEAR);
//当前月 int month = (cal.get(Calendar.MONTH))+1;
//当前月的第几天:即当前日 int day_of_month = cal.get(Calendar.DAY_OF_MONTH);
//当前时:HOUR_OF_DAY-24小时制;HOUR-12小时制 int hour = cal.get(Calendar.HOUR_OF_DAY);
//当前分 int minute = cal.get(Calendar.MINUTE);
//当前秒 int second = cal.get(Calendar.SECOND);
//0-上午;1-下午 int ampm = cal.get(Calendar.AM_PM);
//当前年的第几周 int week_of_year = cal.get(Calendar.WEEK_OF_YEAR);
//当前月的第几周 int week_of_month = cal.get(Calendar.WEEK_OF_MONTH);
//当前年的第几天 int day_of_year = cal.get(Calendar.DAY_OF_YEAR);
WEEK_OF_MONTH 某月第几周,严格以星期的起止算。比如这个月3号才是周一,那3号才算第1周,2号不算。以星期为标准 DAY_OF_WEEK_IN_MONTH 某月中第几周,按这个月1号算,1号起就是第1周,8号起就是第2周。以月份天数为标准。
int am = calendar.get(Calendar.AM);
int pm = calendar.get(Calendar.PM); //这2行是误用,AM和PM是作为值的常量
正确用法
int r = calendar.get(Calendar.AM_PM);//询上午还是下午
if(r==Calendar.AM)//如果上午
if(r==Calendar.PM)//如果下午