# crontab

**Repository Path**: hbh112233abc/crontab

## Basic Information

- **Project Name**: crontab
- **Description**: window仿linux的crontab的定时任务
- **Primary Language**: Go
- **License**: Not specified
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-04-27
- **Last Updated**: 2026-04-27

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 定时器

[crontab 配置参考](https://pkg.go.dev/github.com/robfig/cron/v3#section-readme)

时间格式如下：

CRON Expression Format ¶
A cron expression represents a set of times, using 5 space-separated fields.

Field name   | Mandatory? | Allowed values  | Allowed special characters
----------   | ---------- | --------------  | --------------------------
Seconds      | Yes        | 0-59            | * / , -
Minutes      | Yes        | 0-59            | * / , -
Hours        | Yes        | 0-23            | * / , -
Day of month | Yes        | 1-31            | * / , - ?
Month        | Yes        | 1-12 or JAN-DEC | * / , -
Day of week  | Yes        | 0-6 or SUN-SAT  | * / , - ?


Note: Month and Day-of-week field values are case insensitive. "SUN", "Sun", and "sun" are equally accepted.

Special Characters ¶
Asterisk ( * )

The asterisk indicates that the cron expression will match for all values of the field; e.g., using an asterisk in the 5th field (month) would indicate every month.

Slash ( / )

Slashes are used to describe increments of ranges. For example 3-59/15 in the 1st field (minutes) would indicate the 3rd minute of the hour and every 15 minutes thereafter. The form "*\/..." is equivalent to the form "first-last/...", that is, an increment over the largest possible range of the field. The form "N/..." is accepted as meaning "N-MAX/...", that is, starting at N, use the increment until the end of that specific range. It does not wrap around.

Comma ( , )

Commas are used to separate items of a list. For example, using "MON,WED,FRI" in the 5th field (day of week) would mean Mondays, Wednesdays and Fridays.

Hyphen ( - )

Hyphens are used to define ranges. For example, 9-17 would indicate every hour between 9am and 5pm inclusive.

Question mark ( ? )

Question mark may be used instead of '*' for leaving either day-of-month or day-of-week blank.

Predefined schedules ¶
You may use one of several pre-defined schedules in place of a cron expression.

Entry                  | Description                                | Equivalent To
-----                  | -----------                                | -------------
@yearly (or @annually) | Run once a year, midnight, Jan. 1st        | 0 0 0 1 1 *
@monthly               | Run once a month, midnight, first of month | 0 0 0 1 * *
@weekly                | Run once a week, midnight between Sat/Sun  | 0 0 0 * * 0
@daily (or @midnight)  | Run once a day, midnight                   | 0 0 0 * * *
@hourly                | Run once an hour, beginning of hour        | 0 0 * * * *

## 添加图标
[Go在Window平台下编译出来的exe如何添加一个图标](https://blog.csdn.net/wtt234/article/details/124512392)
- 下载图标ico,命名为`logo.ico`
- 创建exe同名rc文件,例:crontab.rc
    ```
    IDI_ICON1 ICON "logo.ico"
    ```
- 生成syso文件
    ```
    windres -o crontab.syso crontab.rc
    ```
- 编译
    ```
    go build .
    ```

## 编译
> 有窗口,可以用来调试
```
go build -ldflags "-X 'main.version=$(git rev-parse --short HEAD)'" .
```
> 无窗口模式
```
go build -ldflags "-X 'main.version=$(git rev-parse --short HEAD)' -H windowsgui" .
```