java.lang.Object
- org.springframework.scheduling.support.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 6,19 * * *" = 6:00 AM and 7:00 PM every day.
- "0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30, 10:00 and 10:30 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
Since:
3.0
Author:
Dave Syer, Juergen Hoeller, Ruslan Sibgatullin
See Also:
CronTrigger

Constructor Summary

Constructors
Constructor	Description
`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`.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object other)`
`int`	`hashCode()`
`static boolean`	`isValidExpression(String expression)`	Determine whether the specified expression represents a valid cron pattern.
`Date`	`next(Date date)`	Get the next `Date` in the sequence matching the Cron pattern and after the value provided.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - CronSequenceGenerator
```
public CronSequenceGenerator(String expression)
```
    Construct a CronSequenceGenerator from the pattern provided, using the default TimeZone.
    Parameters:
    expression - a space-separated list of time fields
    Throws:
    IllegalArgumentException - if the pattern cannot be parsed
    See Also:
    TimeZone.getDefault()
  - CronSequenceGenerator
```
public CronSequenceGenerator(String expression,
                             TimeZone timeZone)
```
    Construct a CronSequenceGenerator from the pattern provided, using the specified TimeZone.
    Parameters:
    expression - a space-separated list of time fields
    timeZone - the TimeZone to use for generated trigger times
    Throws:
    IllegalArgumentException - if the pattern cannot be parsed
- Method Detail
  - 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.
    Parameters:
    date - a seed value
    Returns:
    the next value matching the pattern
  - isValidExpression
```
public static boolean isValidExpression(String expression)
```
    Determine whether the specified expression represents a valid cron pattern.
    Parameters:
    expression - the expression to evaluate
    Returns:
    true if the given expression is a valid cron expression
    Since:
    4.3
  - equals
```
public boolean equals(Object other)
```
    Overrides:
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    toString in class Object

Class CronSequenceGenerator

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CronSequenceGenerator

CronSequenceGenerator

Method Detail

next

isValidExpression

equals

hashCode

toString