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jar版本：2.3
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Method Summary
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static java.util.Date
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addDays
(java.util.Date date,
int amount)
Adds
a number of days to a date returning a new object.
一个日期对象＋
n天
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static java.util.Date
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addHours
(java.util.Date date,
int amount)
Adds
a number of hours to a date returning a new object.
一个日期对象＋
n小时
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static java.util.Date
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addMilliseconds
(java.util.Date date,
int amount)
Adds
a number of milliseconds to a date returning a new object.
一个日期对象
+n毫秒
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static java.util.Date
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addMinutes
(java.util.Date date,
int amount)
Adds
a number of minutes to a date returning a new object.
一个日期对象
+n分
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static java.util.Date
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addMonths
(java.util.Date date,
int amount)
Adds
a number of months to a date returning a new object.
一个日期对象＋
n月
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static java.util.Date
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addSeconds
(java.util.Date date,
int amount)
Adds
a number of seconds to a date returning a new object.
一个日期对象＋
n秒
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static java.util.Date
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addWeeks
(java.util.Date date,
int amount)
Adds
a number of weeks to a date returning a new object.
一个日期对象＋
N个星期
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static java.util.Date
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addYears
(java.util.Date date,
int amount)
Adds
a number of years to a date returning a new object.
一个日期对象＋
N年
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static boolean
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isSameDay
(java.util.Date date1,
java.util.Date date2)
Checks
if two date objects are on the same day ignoring time.
两个日期对象是否相等（只比较年－月－日）
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static boolean
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isSameInstant
(java.util.Date date1,
java.util.Date date2)
Checks
if two date objects represent the same instant in time.
比较两个日期是否完全相等（精确到毫秒）
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static java.util.Date
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parseDate
(java.lang.String str,
java.lang.String[] parsePatterns)
Parses
a string representing a date by trying a variety of different
parsers.
例 ：
String[]
format={
"yyyy-MM-dd"
};
System.
out
.println(DateUtils.parseDate
(
"2009-10-20"
,
format));
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