Validation

Cron Expression (Quartz/Spring, 6-Field)

Validate 6-field Quartz/Spring cron expressions including the seconds field at the front.

Available in

JavaScript / ECMAScript code

jsJavaScript

const re = new RegExp("^(\\*|([0-5]?\\d))\\s+(\\*|([0-5]?\\d))\\s+(\\*|([01]?\\d|2[0-3]))\\s+(\\*|([1-9]|[12]\\d|3[01]))\\s+(\\*|([1-9]|1[0-2]))\\s+(\\*|\\?|[0-7])$", "");
const input = "0 0 9 * * 1";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

Python (re) code

pyPython

import re

pattern = re.compile(r"^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$")
input_text = "0 0 9 * * 1"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

Go (RE2) code

goGo

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$`)
	input := `0 0 9 * * 1`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

Pattern

regexengine-agnostic

^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$

Raw source: ^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$

How it works

Six fields: seconds (0–59), minutes (0–59), hours (0–23), day-of-month (1–31), month (1–12), and day-of-week (0–7, where Quartz also accepts `?` to mean "no specific value"). Each field also accepts `*` for any value. This is the Quartz/Spring scheduler format — distinct from the standard 5-field Unix cron in batch 1.