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Cron 表达式生成器Cron Generator

Cron表达式生成与解析，查看执行时间Cron expression generator and parser, view execution times.

描述

每周一到周五 9点 整

字段解析

分

0

0

时

9

9

日

*

每日

月

*

每月

周

1-5

周1到周5

最近执行时间

2026/09/23周三 09:00
2026/09/24周四 09:00
2026/09/25周五 09:00
2026/09/28周一 09:00
2026/09/29周二 09:00
2026/09/30周三 09:00
2026/10/01周四 09:00
2026/10/02周五 09:00
2026/10/05周一 09:00
2026/10/06周二 09:00

常用表达式

关于 Cron 表达式生成器About Cron Generator

Cron 表达式用于 Linux、Quartz、K8s 等环境中定义周期任务，但五段式语法全靠记忆，写错就要“半夜报警”。本工具通过可视化面板生成 Cron 表达式，也能反向解析已有表达式，并列出未来若干次执行时间供核对。Cron expressions define recurring tasks in Linux, Quartz, K8s and more, but the five-field syntax relies on memory — a mistake means a 3 a.m. alert. This tool generates Cron expressions from a visual panel, parses existing ones, and lists upcoming execution times for verification.

使用方法How to Use

  1. 在可视化面板中选择分钟、小时、日、月、周的执行规则。Pick the minute, hour, day, month and weekday rules in the visual panel.
  2. 工具实时生成对应的 Cron 表达式。The tool generates the matching Cron expression in real time.
  3. 如需解析已有表达式，直接粘贴到输入框即可查看含义。To parse an existing expression, paste it into the input box to see its meaning.
  4. 核对列出的未来几次执行时间，确认配置无误后复制到调度系统。Check the listed upcoming run times, then copy the expression into your scheduler once confirmed.

常见问题FAQ

Cron 的五个字段分别是什么？What are the five Cron fields?

从左到右依次为：分钟（0–59）、小时（0–23）、日（1–31）、月（1–12）、星期（0–7，0 和 7 都代表周日）。Left to right: minute (0–59), hour (0–23), day of month (1–31), month (1–12), day of week (0–7, where both 0 and 7 mean Sunday).

“每天凌晨 3 点半执行”怎么写？How do I write "run daily at 3:30 am"?

写作 30 3 * * *，即分钟为 30、小时为 3，其余字段用 * 表示不限制。It is 30 3 * * * — minute 30, hour 3, with * meaning no restriction on the remaining fields.

*/5 和 5 有什么区别？What is the difference between */5 and 5?

*/5 表示“每 5 个单位一次”（如每 5 分钟），5 表示“在第 5 个单位”（如每小时第 5 分钟）。这是初学者最容易混淆的地方。*/5 means "every 5 units" (e.g. every 5 minutes); 5 means "at unit 5" (e.g. minute 5 of each hour). This is the most common beginner confusion.

相关阅读Related Reading

Cron 表达式实战：6 个高频调度场景与 Linux/Quartz 的字段差异Cron Expressions in Practice: 6 Common Scheduling Scenarios and the Linux/Quartz Field Difference

Cron 表达式看起来只有五六个字段，但"每 5 分钟"和"每 5 分钟从第 3 分开始"是两回事，Linux cron 和 Quartz 的字段数还不一样。本文用 6 个真实场景把写法讲透，附字段差异对照表A cron expression looks like just five or six fields, but "every 5 minutes" and "every 5 minutes starting from minute 3" are different things — and Linux cron and Quartz don't even have the same number of fields. This article works through six real scenarios and includes a field-difference comparison table.

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