org.nutz.lang.util

类 CronSequenceGenerator

java.lang.Object

org.nutz.lang.util.CronSequenceGenerator

public class CronSequenceGenerator
extends Object

Date sequence generator for a Crontab pattern, allowing clients to specify a pattern that the sequence matches.

The pattern is a list of six single space-separated fields: representing second, minute, hour, day, month, weekday. Month and weekday names can be given as the first three letters of the English names.

Example patterns:

• "0 0 * * * *" = the top of every hour of every day.
• "*/10 * * * * *" = every ten seconds.
• "0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.
• "0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30 and 10 o'clock every day.
• "0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays
• "0 0 0 25 12 ?" = every Christmas Day at midnight

作者:

Dave Syer, Juergen Hoeller

构造器概要

构造器

构造器和说明
CronSequenceGenerator(String expression) Construct a CronSequenceGenerator from the pattern provided, using the default TimeZone.
CronSequenceGenerator(String expression, TimeZone timeZone) Construct a CronSequenceGenerator from the pattern provided, using the specified TimeZone.

方法概要

限定符和类型	方法和说明
boolean	equals(Object other)
int	hashCode()
Date	next(Date date) Get the next Date in the sequence matching the Cron pattern and after the value provided.
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

构造器详细资料

CronSequenceGenerator

public CronSequenceGenerator(String expression)

Construct a CronSequenceGenerator from the pattern provided, using the default TimeZone.

参数:

expression - a space-separated list of time fields

抛出:

IllegalArgumentException - if the pattern cannot be parsed

另请参阅:

TimeZone.getDefault()

CronSequenceGenerator

public CronSequenceGenerator(String expression,
                             TimeZone timeZone)

Construct a CronSequenceGenerator from the pattern provided, using the specified TimeZone.

参数:

expression - a space-separated list of time fields

timeZone - the TimeZone to use for generated trigger times

抛出:

IllegalArgumentException - if the pattern cannot be parsed

方法详细资料

next

public Date next(Date date)

Get the next Date in the sequence matching the Cron pattern and after the value provided. The return value will have a whole number of seconds, and will be after the input value.

参数:

date - a seed value

返回:

the next value matching the pattern

equals

public boolean equals(Object other)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object