{"id":99597,"date":"2026-09-02T22:49:25","date_gmt":"2026-09-02T14:49:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99597.html"},"modified":"2026-09-02T22:49:25","modified_gmt":"2026-09-02T14:49:25","slug":"%e7%94%a8%e4%bb%a3%e7%a0%81%e5%ae%9e%e7%8e%b0-cron-%e8%a1%a8%e8%be%be%e5%bc%8f%e8%a7%a3%e6%9e%90%e5%99%a8%ef%bc%9a%e4%bb%8e%e6%a0%a1%e9%aa%8c%e5%88%b0%e4%b8%8b%e6%ac%a1%e6%89%a7%e8%a1%8c%e6%97%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99597.html","title":{"rendered":"\u7528\u4ee3\u7801\u5b9e\u73b0 Cron \u8868\u8fbe\u5f0f\u89e3\u6790\u5668\uff1a\u4ece\u6821\u9a8c\u5230\u4e0b\u6b21\u6267\u884c\u65f6\u95f4\u8ba1\u7b97"},"content":{"rendered":"

\u7f51\u4e0a Cron \u8868\u8fbe\u5f0f\u6821\u9a8c\u5de5\u5177\u5f88\u591a，\u4f46\u4f60\u60f3\u8fc7\u81ea\u5df1\u5b9e\u73b0\u4e00\u4e2a\u5417？\u672c\u6587\u4ece\u96f6\u62c6\u89e3 Cron \u89e3\u6790\u5668\u7684\u6838\u5fc3\u903b\u8f91：\u5b57\u6bb5\u89e3\u6790\u3001\u8bed\u6cd5\u6821\u9a8c\u3001\u4e2d\u6587\u89e3\u91ca\u751f\u6210\u3001\u4e0b\u6b21\u89e6\u53d1\u65f6\u95f4\u8ba1\u7b97，\u6bcf\u4e2a\u6a21\u5757\u914d TypeScript \u5b8c\u6574\u4ee3\u7801\u3002<\/p>\n

\u6574\u4f53\u67b6\u6784<\/h3>\n

\u4e00\u4e2a\u5b8c\u6574\u7684 Cron \u89e3\u6790\u5668\u9700\u8981\u4e09\u4e2a\u6838\u5fc3\u80fd\u529b：<\/p>\n\n\u80fd\u529b\u51fd\u6570\u4f5c\u7528<\/tr>\n\n\n\n\n
\u6821\u9a8c<\/td>\nvalidateCron()<\/td>\n\u68c0\u67e5\u8bed\u6cd5\u662f\u5426\u5408\u6cd5\u3001\u53d6\u503c\u662f\u5426\u8d8a\u754c<\/td>\n<\/tr>\n
\u89e3\u91ca<\/td>\nexplainCron()<\/td>\n\u5c06\u8868\u8fbe\u5f0f\u7ffb\u8bd1\u6210\u4eba\u7c7b\u53ef\u8bfb\u7684\u4e2d\u6587<\/td>\n<\/tr>\n
\u9884\u6d4b<\/td>\ngetNextTriggerTimes()<\/td>\n\u8ba1\u7b97\u672a\u6765 N \u6b21\u89e6\u53d1\u65f6\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e09\u4e2a\u51fd\u6570\u7684\u5173\u7cfb\u662f\u4e32\u884c\u7684：\u5148\u6821\u9a8c，\u6821\u9a8c\u901a\u8fc7\u624d\u89e3\u6790\u548c\u89e3\u91ca，\u6700\u540e\u8ba1\u7b97\u89e6\u53d1\u65f6\u95f4\u3002\u6240\u6709\u51fd\u6570\u90fd\u662f\u7eaf\u51fd\u6570，\u4e0d\u4f9d\u8d56\u8fd0\u884c\u65f6\u73af\u5883，\u65b9\u4fbf\u5355\u5143\u6d4b\u8bd5\u3002<\/p>\n

\u5148\u5b9a\u4e49\u57fa\u7840\u7c7b\u578b：<\/p>\n

export<\/span> type<\/span> CronMode<\/span> =<\/span> '5-field'<\/span> |<\/span> '6-field'<\/span><\/p>\n

export<\/span> interface<\/span> CronValidationResult<\/span> {<\/span>
\n valid:<\/span> boolean<\/span>
\n error?<\/span>:<\/span> string<\/span>
\n errorField?<\/span>:<\/span> string<\/span> \/\/ \u51fa\u9519\u5b57\u6bb5\u540d<\/span>
\n}<\/span><\/p>\n

5 \u6bb5\u683c\u5f0f\u662f \u5206 \u65f6 \u65e5 \u6708 \u5468，6 \u6bb5\u683c\u5f0f\u591a\u4e00\u4e2a\u79d2\u5b57\u6bb5\u3002\u7528\u5b57\u6bb5\u5b9a\u4e49\u8868\u7edf\u4e00\u7ba1\u7406\u53d6\u503c\u8303\u56f4：<\/p>\n

interface<\/span> FieldDef<\/span> {<\/span>
\n name:<\/span> 'sec'<\/span> |<\/span> 'min'<\/span> |<\/span> 'hour'<\/span> |<\/span> 'day'<\/span> |<\/span> 'month'<\/span> |<\/span> 'week'<\/span>
\n label:<\/span> string<\/span>
\n min:<\/span> number<\/span>
\n max:<\/span> number<\/span>
\n}<\/span><\/p>\n

const<\/span> FIELD_DEFS_5<\/span>:<\/span> FieldDef[<\/span>]<\/span> =<\/span> [<\/span>
\n {<\/span> name:<\/span> 'min'<\/span>,<\/span> label:<\/span> '\u5206'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 59<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'hour'<\/span>,<\/span> label:<\/span> '\u65f6'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 23<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'day'<\/span>,<\/span> label:<\/span> '\u65e5'<\/span>,<\/span> min:<\/span> 1<\/span>,<\/span> max:<\/span> 31<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'month'<\/span>,<\/span> label:<\/span> '\u6708'<\/span>,<\/span> min:<\/span> 1<\/span>,<\/span> max:<\/span> 12<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'week'<\/span>,<\/span> label:<\/span> '\u5468'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 7<\/span> }<\/span>,<\/span>
\n]<\/span><\/p>\n

const<\/span> FIELD_DEFS_6<\/span>:<\/span> FieldDef[<\/span>]<\/span> =<\/span> [<\/span>
\n {<\/span> name:<\/span> 'sec'<\/span>,<\/span> label:<\/span> '\u79d2'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 59<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'min'<\/span>,<\/span> label:<\/span> '\u5206'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 59<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'hour'<\/span>,<\/span> label:<\/span> '\u65f6'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 23<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'day'<\/span>,<\/span> label:<\/span> '\u65e5'<\/span>,<\/span> min:<\/span> 1<\/span>,<\/span> max:<\/span> 31<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'month'<\/span>,<\/span> label:<\/span> '\u6708'<\/span>,<\/span> min:<\/span> 1<\/span>,<\/span> max:<\/span> 12<\/span> }<\/span>,<\/span>
\n {<\/span> name:<\/span> 'week'<\/span>,<\/span> label:<\/span> '\u5468'<\/span>,<\/span> min:<\/span> 0<\/span>,<\/span> max:<\/span> 7<\/span> }<\/span>,<\/span>
\n]<\/span><\/p>\n

\u5468\u5b57\u6bb5 max \u662f 7 \u800c\u4e0d\u662f 6，\u56e0\u4e3a 0 \u548c 7 \u90fd\u8868\u793a\u5468\u65e5\u3002\u540e\u7eed\u5728\u5f52\u4e00\u5316\u65f6\u7edf\u4e00\u628a 7 \u8f6c\u4e3a 0\u3002<\/p>\n

\u4e00\u3001\u6821\u9a8c：validateCron()<\/h3>\n

\u6821\u9a8c\u662f\u7b2c\u4e00\u9053\u5173\u5361，\u786e\u4fdd\u8868\u8fbe\u5f0f\u8bed\u6cd5\u6b63\u786e\u3002\u6838\u5fc3\u903b\u8f91\u5206\u4e09\u6b65：<\/p>\n

1. \u7a7a\u503c\u548c\u5b57\u6bb5\u6570\u68c0\u67e5<\/h4>\n

export<\/span> function<\/span> validateCron<\/span>(<\/span>
\n expression:<\/span> string<\/span>,<\/span>
\n mode:<\/span> CronMode,<\/span>
\n)<\/span>:<\/span> CronValidationResult {<\/span>
\n const<\/span> trimmed =<\/span> (<\/span>expression ||<\/span> ''<\/span>)<\/span>.<\/span>trim<\/span>(<\/span>)<\/span>
\n if<\/span> (<\/span>!<\/span>trimmed)<\/span> {<\/span>
\n return<\/span> {<\/span> valid:<\/span> false<\/span>,<\/span> error:<\/span> '\u8868\u8fbe\u5f0f\u4e0d\u80fd\u4e3a\u7a7a'<\/span>,<\/span> errorField:<\/span> 'expression'<\/span> }<\/span>
\n }<\/span>
\n const<\/span> parts =<\/span> trimmed.<\/span>split<\/span>(<\/span>\/<\/span>\\\\s+<\/span>\/<\/span><\/span>)<\/span>
\n const<\/span> expected =<\/span> mode ===<\/span> '5-field'<\/span> ?<\/span> 5<\/span> :<\/span> 6<\/span>
\n if<\/span> (<\/span>parts.<\/span>length !==<\/span> expected)<\/span> {<\/span>
\n return<\/span> {<\/span>
\n valid:<\/span> false<\/span>,<\/span>
\n error:<\/span> `<\/span>\u8868\u8fbe\u5f0f\u5e94\u4e3a <\/span>${<\/span>expected}<\/span><\/span> \u4e2a\u5b57\u6bb5，\u5f53\u524d\u4e3a <\/span>${<\/span>parts.<\/span>length}<\/span><\/span> \u4e2a<\/span>`<\/span><\/span>,<\/span>
\n errorField:<\/span> 'expression'<\/span>,<\/span>
\n }<\/span>
\n }<\/span>
\n \/\/ \u9010\u5b57\u6bb5\u6821\u9a8c…<\/span>
\n}<\/span><\/p>\n

\u7528 split(\/\\\\s+\/) \u6309\u7a7a\u683c\u5206\u5272，\u517c\u5bb9\u591a\u4e2a\u7a7a\u683c\u7684\u60c5\u51b5\u3002\u5b57\u6bb5\u6570\u4e0d\u5339\u914d\u662f\u6700\u5e38\u89c1\u7684\u9519\u8bef\u2014\u2014\u4ece Unix crontab \u8fc1\u79fb\u5230 Spring \u65f6\u7ecf\u5e38\u5c11\u4e00\u6bb5\u3002<\/p>\n

2. \u7279\u6b8a\u5b57\u7b26\u5206\u53d1<\/h4>\n

\u6bcf\u4e2a\u5b57\u6bb5\u53ef\u80fd\u662f *\u3001?\u3001L\u3001W\u3001# \u6216\u666e\u901a\u8868\u8fbe\u5f0f\u3002\u5148\u5904\u7406\u7279\u6b8a\u5b57\u7b26，\u518d\u505a\u901a\u7528\u89e3\u6790：<\/p>\n

function<\/span> validateField<\/span>(<\/span>field:<\/span> string<\/span>,<\/span> def:<\/span> FieldDef)<\/span> {<\/span>
\n \/\/ ? \u4ec5\u5141\u8bb8\u5728\u65e5\/\u5468\u5b57\u6bb5<\/span>
\n if<\/span> (<\/span>field ===<\/span> '?'<\/span>)<\/span> {<\/span>
\n if<\/span> (<\/span>def.<\/span>name !==<\/span> 'day'<\/span> &&<\/span> def.<\/span>name !==<\/span> 'week'<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span> valid:<\/span> false<\/span>,<\/span> error:<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u4e0d\u652f\u6301 ?<\/span>`<\/span><\/span> }<\/span>
\n }<\/span>
\n return<\/span> {<\/span> valid:<\/span> true<\/span> }<\/span>
\n }<\/span><\/p>\n

\/\/ # \u4ec5\u5141\u8bb8\u5728\u5468\u5b57\u6bb5：\u5982 6#3<\/span>
\n if<\/span> (<\/span>field.<\/span>includes<\/span>(<\/span>'#'<\/span>)<\/span>)<\/span> {<\/span>
\n if<\/span> (<\/span>def.<\/span>name !==<\/span> 'week'<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span> valid:<\/span> false<\/span>,<\/span> error:<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u4e0d\u652f\u6301 #<\/span>`<\/span><\/span> }<\/span>
\n }<\/span>
\n const<\/span> [<\/span>wPart,<\/span> nPart]<\/span> =<\/span> field.<\/span>split<\/span>(<\/span>'#'<\/span>)<\/span>
\n const<\/span> w =<\/span> parseInt<\/span>(<\/span>wPart,<\/span> 10<\/span>)<\/span>
\n const<\/span> n =<\/span> parseInt<\/span>(<\/span>nPart,<\/span> 10<\/span>)<\/span>
\n if<\/span> (<\/span>n <<\/span> 1<\/span> ||<\/span> n ><\/span> 5<\/span>)<\/span> {<\/span>
\n return<\/span> {<\/span> valid:<\/span> false<\/span>,<\/span> error:<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5 # \u540e\u503c\u5e94\u5728 1-5 \u4e4b\u95f4<\/span>`<\/span><\/span> }<\/span>
\n }<\/span>
\n return<\/span> {<\/span> valid:<\/span> true<\/span> }<\/span>
\n }<\/span><\/p>\n

\/\/ L \u4ec5\u5141\u8bb8\u5728\u65e5\/\u5468\u5b57\u6bb5<\/span>
\n \/\/ W \u4ec5\u5141\u8bb8\u5728\u65e5\u5b57\u6bb5<\/span>
\n \/\/ …\u7c7b\u4f3c\u5904\u7406<\/span>
\n}<\/span><\/p>\n

\u5173\u952e\u8bbe\u8ba1：\u7279\u6b8a\u5b57\u7b26\u6709\u5b57\u6bb5\u9650\u5236\u3002? \u53ea\u80fd\u5728\u65e5\u548c\u5468\u5b57\u6bb5，# \u53ea\u80fd\u5728\u5468\u5b57\u6bb5，W \u53ea\u80fd\u5728\u65e5\u5b57\u6bb5，L \u53ef\u4ee5\u5728\u65e5\u548c\u5468\u5b57\u6bb5\u3002\u8fdd\u53cd\u9650\u5236\u76f4\u63a5\u62a5\u9519，\u9519\u8bef\u4fe1\u606f\u6307\u660e\u51fa\u9519\u5b57\u6bb5\u3002<\/p>\n

3. \u901a\u7528\u9879\u6821\u9a8c<\/h4>\n

\u53bb\u6389\u7279\u6b8a\u5b57\u7b26\u540e，\u5269\u4e0b\u7684\u8868\u8fbe\u5f0f\u6309\u9017\u53f7\u62c6\u5206\u5217\u8868\u9879，\u6bcf\u4e2a\u5217\u8868\u9879\u53ef\u80fd\u662f：<\/p>\n

    \n
  • * \u2014 \u4efb\u610f\u503c<\/li>\n
  • *\/n \u2014 \u6b65\u957f<\/li>\n
  • n \u2014 \u5355\u503c<\/li>\n
  • n-m \u2014 \u8303\u56f4<\/li>\n
  • n-m\/s \u2014 \u8303\u56f4 + \u6b65\u957f<\/li>\n<\/ul>\n

    function<\/span> validateItem<\/span>(<\/span>item:<\/span> string<\/span>,<\/span> def:<\/span> FieldDef)<\/span>:<\/span> string<\/span> |<\/span> undefined<\/span> {<\/span>
    \n if<\/span> (<\/span>item ===<\/span> '*'<\/span>)<\/span> return<\/span> undefined<\/span><\/p>\n

    \/\/ *\/n<\/span>
    \n const<\/span> starStep =<\/span> \/<\/span>^\\\\*\\\\\/(\\\\d+)$<\/span>\/<\/span><\/span>.<\/span>exec<\/span>(<\/span>item)<\/span>
    \n if<\/span> (<\/span>starStep)<\/span> {<\/span>
    \n const<\/span> step =<\/span> parseInt<\/span>(<\/span>starStep[<\/span>1<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>
    \n if<\/span> (<\/span>step <<\/span> 1<\/span>)<\/span> return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u6b65\u957f\u5e94\u5927\u4e8e 0<\/span>`<\/span><\/span>
    \n return<\/span> undefined<\/span>
    \n }<\/span><\/p>\n

    \/\/ n-m\/s<\/span>
    \n const<\/span> rangeStep =<\/span> \/<\/span>^(\\\\d+)-(\\\\d+)\\\\\/(\\\\d+)$<\/span>\/<\/span><\/span>.<\/span>exec<\/span>(<\/span>item)<\/span>
    \n if<\/span> (<\/span>rangeStep)<\/span> {<\/span>
    \n const<\/span> lo =<\/span> parseInt<\/span>(<\/span>rangeStep[<\/span>1<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>
    \n const<\/span> hi =<\/span> parseInt<\/span>(<\/span>rangeStep[<\/span>2<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>
    \n const<\/span> step =<\/span> parseInt<\/span>(<\/span>rangeStep[<\/span>3<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>
    \n if<\/span> (<\/span>lo ><\/span> hi)<\/span> return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u8303\u56f4\u8d77\u59cb\u5927\u4e8e\u7ed3\u675f<\/span>`<\/span><\/span>
    \n if<\/span> (<\/span>step <<\/span> 1<\/span>)<\/span> return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u6b65\u957f\u5e94\u5927\u4e8e 0<\/span>`<\/span><\/span>
    \n return<\/span> checkValueInRange<\/span>(<\/span>lo,<\/span> hi,<\/span> def)<\/span>
    \n }<\/span><\/p>\n

    \/\/ n-m<\/span>
    \n const<\/span> range =<\/span> \/<\/span>^(\\\\d+)-(\\\\d+)$<\/span>\/<\/span><\/span>.<\/span>exec<\/span>(<\/span>item)<\/span>
    \n if<\/span> (<\/span>range)<\/span> {<\/span>
    \n return<\/span> checkValueInRange<\/span>(<\/span>parseInt<\/span>(<\/span>range[<\/span>1<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>,<\/span> parseInt<\/span>(<\/span>range[<\/span>2<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>,<\/span> def)<\/span>
    \n }<\/span><\/p>\n

    \/\/ n<\/span>
    \n const<\/span> single =<\/span> \/<\/span>^(\\\\d+)$<\/span>\/<\/span><\/span>.<\/span>exec<\/span>(<\/span>item)<\/span>
    \n if<\/span> (<\/span>single)<\/span> {<\/span>
    \n return<\/span> checkValueInRange<\/span>(<\/span>parseInt<\/span>(<\/span>single[<\/span>1<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>,<\/span> parseInt<\/span>(<\/span>single[<\/span>1<\/span>]<\/span>,<\/span> 10<\/span>)<\/span>,<\/span> def)<\/span>
    \n }<\/span><\/p>\n

    return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u8bed\u6cd5\u9519\u8bef：<\/span>${<\/span>item}<\/span><\/span>`<\/span><\/span>
    \n}<\/span><\/p>\n

    \u6bcf\u4e2a\u6b63\u5219\u5bf9\u5e94\u4e00\u79cd\u8bed\u6cd5\u683c\u5f0f，\u6309\u4f18\u5148\u7ea7\u4f9d\u6b21\u5339\u914d\u3002\u53d6\u503c\u8303\u56f4\u68c0\u67e5\u7edf\u4e00\u4ea4\u7ed9 checkValueInRange：<\/p>\n

    function<\/span> checkValueInRange<\/span>(<\/span>lo:<\/span> number<\/span>,<\/span> hi:<\/span> number<\/span>,<\/span> def:<\/span> FieldDef)<\/span> {<\/span>
    \n if<\/span> (<\/span>lo <<\/span> def.<\/span>min ||<\/span> lo ><\/span> def.<\/span>max)<\/span> return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u503c <\/span>${<\/span>lo}<\/span><\/span> \u8d8a\u754c<\/span>`<\/span><\/span>
    \n if<\/span> (<\/span>hi <<\/span> def.<\/span>min ||<\/span> hi ><\/span> def.<\/span>max)<\/span> return<\/span> `<\/span>${<\/span>def.<\/span>label}<\/span><\/span>\u5b57\u6bb5\u503c <\/span>${<\/span>hi}<\/span><\/span> \u8d8a\u754c<\/span>`<\/span><\/span>
    \n return<\/span> undefined<\/span>
    \n}<\/span><\/p>\n

    4. \u82f1\u6587\u7f29\u5199\u652f\u6301<\/h4>\n

    \u5468\u548c\u6708\u5b57\u6bb5\u652f\u6301\u82f1\u6587\u7f29\u5199（SUN\/MON\/JAN\/FEB \u7b49），\u6821\u9a8c\u524d\u5148\u66ff\u6362\u4e3a\u6570\u5b57：<\/p>\n

    const<\/span> WEEK_NAMES<\/span>:<\/span> Record<<\/span>string<\/span>,<\/span> number<\/span>><\/span> =<\/span> {<\/span>
    \n SUN<\/span>:<\/span> 0<\/span>,<\/span> MON<\/span>:<\/span> 1<\/span>,<\/span> TUE<\/span>:<\/span> 2<\/span>,<\/span> WED<\/span>:<\/span> 3<\/span>,<\/span> THU<\/span>:<\/span> 4<\/span>,<\/span> FRI<\/span>:<\/span> 5<\/span>,<\/span> SAT<\/span>:<\/span> 6<\/span>,<\/span>
    \n}<\/span><\/p>\n

    function<\/span> replaceWeekNames<\/span>(<\/span>s:<\/span> string<\/span>)<\/span>:<\/span> string<\/span> {<\/span>
    \n return<\/span> s.<\/span>replace<\/span>(<\/span>\/<\/span>SUN|MON|TUE|WED|THU|FRI|SAT<\/span>\/<\/span>gi<\/span><\/span>,<\/span> (<\/span>m)<\/span> =><\/span>
    \n String<\/span>(<\/span>WEEK_NAMES<\/span>[<\/span>m.<\/span>toUpperCase<\/span>(<\/span>)<\/span>]<\/span> ??<\/span> m)<\/span>
    \n )<\/span>
    \n}<\/span><\/p>\n

    \u66ff\u6362\u540e\u518d\u8d70\u901a\u7528\u6821\u9a8c\u6d41\u7a0b，\u907f\u514d\u4e3a\u82f1\u6587\u7f29\u5199\u5199\u5355\u72ec\u7684\u6821\u9a8c\u903b\u8f91\u3002<\/p>\n

    \u4e8c\u3001\u4e2d\u6587\u89e3\u91ca：explainCron()<\/h3>\n

    \u6821\u9a8c\u901a\u8fc7\u540e，\u628a\u8868\u8fbe\u5f0f\u7ffb\u8bd1\u6210\u4e2d\u6587\u3002\u8fd9\u91cc\u91c7\u7528"\u9ad8\u9891\u6a21\u5f0f\u4f18\u5148\u5339\u914d + \u901a\u7528\u56de\u9000"\u7684\u7b56\u7565\u3002<\/p>\n

    1. \u5b57\u6bb5\u89e3\u6790<\/h4>\n

    \u5148\u628a\u6bcf\u4e2a\u5b57\u6bb5\u89e3\u6790\u6210\u7ed3\u6784\u5316\u5bf9\u8c61：<\/p>\n

    interface<\/span> ParsedField<\/span> {<\/span>
    \n any<\/span>:<\/span> boolean<\/span> \/\/ *<\/span>
    \n unspecified:<\/span> boolean<\/span> \/\/ ?<\/span>
    \n values:<\/span> number<\/span>[<\/span>]<\/span> \/\/ \u663e\u5f0f\u679a\u4e3e\u503c<\/span>
    \n step?<\/span>:<\/span> {<\/span> start:<\/span> number<\/span>;<\/span> step:<\/span> number<\/span> }<\/span>
    \n range?<\/span>:<\/span> {<\/span> lo:<\/span> number<\/span>;<\/span> hi:<\/span> number<\/span> }<\/span>
    \n last?<\/span>:<\/span> boolean<\/span> \/\/ L<\/span>
    \n lastValue?<\/span>:<\/span> number<\/span> \/\/ 5L \u4e2d\u7684 5<\/span>
    \n wValue?<\/span>:<\/span> number<\/span> \/\/ 15W \u4e2d\u7684 15<\/span>
    \n hashWeek?<\/span>:<\/span> number<\/span> \/\/ 6#3 \u4e2d\u7684 6<\/span>
    \n hashN?<\/span>:<\/span> number<\/span> \/\/ 6#3 \u4e2d\u7684 3<\/span>
    \n}<\/span><\/p>\n

    parseField \u51fd\u6570\u6839\u636e\u7279\u6b8a\u5b57\u7b26\u5206\u53d1\u5230\u4e0d\u540c\u7684\u89e3\u6790\u5206\u652f，\u6700\u7ec8\u628a\u6240\u6709\u503c\u5c55\u5f00\u4e3a values \u6570\u7ec4\u3002\u6bd4\u5982 *\/5 \u89e3\u6790\u4e3a [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55]，1-10\/2 \u89e3\u6790\u4e3a [1, 3, 5, 7, 9]\u3002<\/p>\n

    2. \u9ad8\u9891\u6a21\u5f0f\u5339\u914d<\/h4>\n

    80% \u7684 Cron \u8868\u8fbe\u5f0f\u96c6\u4e2d\u5728\u51e0\u4e2a\u5e38\u89c1\u6a21\u5f0f\u3002\u4f18\u5148\u5339\u914d\u8fd9\u4e9b\u6a21\u5f0f，\u7ed9\u51fa\u6700\u81ea\u7136\u7684\u4e2d\u6587\u63cf\u8ff0：<\/p>\n

    export<\/span> function<\/span> explainCron<\/span>(<\/span>expression:<\/span> string<\/span>,<\/span> mode:<\/span> CronMode)<\/span>:<\/span> string<\/span> {<\/span>
    \n const<\/span> parsed =<\/span> parseExpression<\/span>(<\/span>expression,<\/span> mode)<\/span>
    \n const<\/span> fields =<\/span> extractFields<\/span>(<\/span>parsed,<\/span> mode)<\/span><\/p>\n

    \/\/ \u6a21\u5f0f1：\u6bcf\u5206\u949f\u6267\u884c<\/span>
    \n if<\/span> (<\/span>fields.<\/span>min.<\/span>any<\/span> &&<\/span> fields.<\/span>hour.<\/span>any<\/span> &&<\/span> isDailyLike<\/span>(<\/span>fields)<\/span>)<\/span> {<\/span>
    \n return<\/span> '\u6bcf\u5206\u949f\u6267\u884c'<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6a21\u5f0f3：\u6bcf N \u5206\u949f<\/span>
    \n if<\/span> (<\/span>fields.<\/span>min.<\/span>step?.<\/span>start ===<\/span> 0<\/span> &&<\/span> fields.<\/span>hour.<\/span>any<\/span> &&<\/span> isDailyLike<\/span>(<\/span>fields)<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>\u6bcf <\/span>${<\/span>fields.<\/span>min.<\/span>step.<\/span>step}<\/span><\/span> \u5206\u949f\u6267\u884c<\/span>`<\/span><\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6a21\u5f0f4：\u6bcf\u5929 HH:mm<\/span>
    \n if<\/span> (<\/span>isSingleValue<\/span>(<\/span>fields.<\/span>min)<\/span> &&<\/span> isSingleValue<\/span>(<\/span>fields.<\/span>hour)<\/span> &&<\/span> isDailyLike<\/span>(<\/span>fields)<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>\u6bcf\u5929 <\/span>${<\/span>buildTimeStr<\/span>(<\/span>fields.<\/span>hour.<\/span>values[<\/span>0<\/span>]<\/span>,<\/span> fields.<\/span>min.<\/span>values[<\/span>0<\/span>]<\/span>)<\/span>}<\/span><\/span> \u6267\u884c<\/span>`<\/span><\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6a21\u5f0f5：\u5de5\u4f5c\u65e5\u6a21\u5f0f<\/span>
    \n if<\/span> (<\/span>isWorkdayPattern<\/span>(<\/span>fields)<\/span> &&<\/span> isSingleValue<\/span>(<\/span>fields.<\/span>min)<\/span> &&<\/span> isSingleValue<\/span>(<\/span>fields.<\/span>hour)<\/span>)<\/span> {<\/span>
    \n const<\/span> t =<\/span> buildTimeStr<\/span>(<\/span>fields.<\/span>hour.<\/span>values[<\/span>0<\/span>]<\/span>,<\/span> fields.<\/span>min.<\/span>values[<\/span>0<\/span>]<\/span>)<\/span>
    \n return<\/span> `<\/span>\u6bcf<\/span>${<\/span>describeWeekField<\/span>(<\/span>fields.<\/span>week)<\/span>}<\/span><\/span> <\/span>${<\/span>t}<\/span><\/span> \u6267\u884c<\/span>`<\/span><\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6a21\u5f0f6：\u6bcf\u6708 N \u65e5<\/span>
    \n if<\/span> (<\/span>isMonthlyDay<\/span>(<\/span>fields)<\/span> &&<\/span> isSingleValue<\/span>(<\/span>fields.<\/span>min)<\/span> &&<\/span> isSingleValue<\/span>(<\/span>fields.<\/span>hour)<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>\u6bcf\u6708 <\/span>${<\/span>fields.<\/span>day.<\/span>values[<\/span>0<\/span>]<\/span>}<\/span><\/span> \u65e5 <\/span>${<\/span>buildTimeStr<\/span>(<\/span>…<\/span>)<\/span>}<\/span><\/span> \u6267\u884c<\/span>`<\/span><\/span>
    \n }<\/span><\/p>\n

    \/\/ \u901a\u7528\u56de\u9000…<\/span>
    \n}<\/span><\/p>\n

    isDailyLike \u5224\u65ad\u65e5\u548c\u5468\u662f\u5426\u90fd\u662f"\u4efb\u610f"\u8bed\u4e49（\u65e5\u4e3a *，\u5468\u4e3a * \u6216 ?，\u6708\u4e3a *）\u3002isWorkdayPattern \u5224\u65ad\u662f\u5426\u662f\u5de5\u4f5c\u65e5\u6a21\u5f0f（\u65e5\u4e3a ?，\u5468\u4e3a\u53d7\u9650\u503c）\u3002<\/p>\n

    \u5339\u914d\u987a\u5e8f\u5f88\u91cd\u8981\u2014\u2014\u4ece\u6700\u5177\u4f53\u7684\u6a21\u5f0f\u5230\u6700\u5bbd\u6cdb\u7684\u6a21\u5f0f\u3002\u5982\u679c\u5148\u68c0\u67e5"\u6bcf\u5929"\u6a21\u5f0f，0 30 9 ? * MON-FRI \u4f1a\u88ab\u8bef\u5224\u4e3a"\u6bcf\u5929 09:30 \u6267\u884c"\u3002<\/p>\n

    3. \u901a\u7528\u56de\u9000<\/h4>\n

    \u590d\u6742\u8868\u8fbe\u5f0f（\u5982 0 0,30 9-11 1,15 * ?）\u65e0\u6cd5\u5339\u914d\u9ad8\u9891\u6a21\u5f0f\u65f6，\u6309\u5b57\u6bb5\u9010\u4e2a\u63cf\u8ff0\u62fc\u63a5：<\/p>\n

    function<\/span> describeField<\/span>(<\/span>field:<\/span> ParsedField,<\/span> name:<\/span> string<\/span>)<\/span>:<\/span> string<\/span> {<\/span>
    \n if<\/span> (<\/span>field.<\/span>any<\/span>)<\/span> return<\/span> ''<\/span>
    \n if<\/span> (<\/span>field.<\/span>step?.<\/span>start ===<\/span> 0<\/span> &&<\/span> field.<\/span>values.<\/span>length ><\/span> 1<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>\u6bcf <\/span>${<\/span>field.<\/span>step.<\/span>step}<\/span><\/span> <\/span>${<\/span>unitMap[<\/span>name]<\/span>}<\/span><\/span>`<\/span><\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>field.<\/span>range)<\/span> {<\/span>
    \n return<\/span> `<\/span>${<\/span>field.<\/span>range.<\/span>lo}<\/span><\/span>–<\/span>${<\/span>field.<\/span>range.<\/span>hi}<\/span><\/span> <\/span>${<\/span>unitMap[<\/span>name]<\/span>}<\/span><\/span>`<\/span><\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>field.<\/span>values.<\/span>length ===<\/span> 1<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>\u7b2c <\/span>${<\/span>field.<\/span>values[<\/span>0<\/span>]<\/span>}<\/span><\/span> <\/span>${<\/span>unitMap[<\/span>name]<\/span>}<\/span><\/span>`<\/span><\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>field.<\/span>values.<\/span>length ><\/span> 1<\/span>)<\/span> {<\/span>
    \n return<\/span> `<\/span>${<\/span>field.<\/span>values.<\/span>join<\/span>(<\/span>'\/'<\/span>)<\/span>}<\/span><\/span> <\/span>${<\/span>unitMap[<\/span>name]<\/span>}<\/span><\/span>`<\/span><\/span>
    \n }<\/span>
    \n return<\/span> ''<\/span>
    \n}<\/span><\/p>\n

    \u62fc\u63a5\u6548\u679c：0 0,30 9-11 1,15 * ? \u2192 \u201c\u7b2c 0 \u79d2，0\/30 \u5206，9-11 \u65f6，\u6bcf\u6708 1\/15 \u65e5 \u6267\u884c\u201d\u3002<\/p>\n

    \u4e09\u3001\u4e0b\u6b21\u89e6\u53d1\u65f6\u95f4：getNextTriggerTimes()<\/h3>\n

    \u8fd9\u662f\u6700\u590d\u6742\u7684\u51fd\u6570\u3002\u8ba1\u7b97\u672a\u6765 N \u6b21\u89e6\u53d1\u65f6\u95f4，\u6838\u5fc3\u601d\u8def\u662f\u66b4\u529b\u904d\u5386\u3002<\/p>\n

    1. \u66b4\u529b\u904d\u5386\u6cd5<\/h4>\n

    \u4ece\u5f53\u524d\u65f6\u95f4\u7684\u4e0b\u4e00\u4e2a\u6700\u5c0f\u5355\u4f4d\u5f00\u59cb，\u6309\u6b65\u957f\u9012\u589e，\u9010\u4e2a\u68c0\u67e5\u662f\u5426\u5339\u914d：<\/p>\n

    export<\/span> function<\/span> getNextTriggerTimes<\/span>(<\/span>
    \n expression:<\/span> string<\/span>,<\/span>
    \n mode:<\/span> CronMode,<\/span>
    \n count:<\/span> number<\/span> =<\/span> 10<\/span>,<\/span>
    \n from:<\/span> Date =<\/span> new<\/span> Date<\/span>(<\/span>)<\/span>,<\/span>
    \n maxIter:<\/span> number<\/span> =<\/span> 5<\/span> *<\/span> 365<\/span> *<\/span> 24<\/span> *<\/span> 3600<\/span>,<\/span> \/\/ 5\u5e74\u4e0a\u9650<\/span>
    \n)<\/span>:<\/span> Date[<\/span>]<\/span> {<\/span>
    \n const<\/span> parsed =<\/span> parseExpression<\/span>(<\/span>expression,<\/span> mode)<\/span>
    \n if<\/span> (<\/span>!<\/span>parsed)<\/span> return<\/span> [<\/span>]<\/span><\/p>\n

    const<\/span> fields =<\/span> extractFields<\/span>(<\/span>parsed,<\/span> mode)<\/span>
    \n const<\/span> stepMs =<\/span> mode ===<\/span> '6-field'<\/span> ?<\/span> 1000<\/span> :<\/span> 60<\/span> *<\/span> 1000<\/span> \/\/ 6\u6bb5\u6309\u79d2，5\u6bb5\u6309\u5206<\/span><\/p>\n

    \/\/ \u8d77\u59cb\u65f6\u95f4\u5bf9\u9f50\u5230\u4e0b\u4e00\u79d2\/\u5206<\/span>
    \n const<\/span> startMs =<\/span> mode ===<\/span> '6-field'<\/span>
    \n ?<\/span> Math.<\/span>floor<\/span>(<\/span>from.<\/span>getTime<\/span>(<\/span>)<\/span> \/<\/span> 1000<\/span>)<\/span> *<\/span> 1000<\/span> +<\/span> 1000<\/span>
    \n :<\/span> Math.<\/span>floor<\/span>(<\/span>from.<\/span>getTime<\/span>(<\/span>)<\/span> \/<\/span> 60000<\/span>)<\/span> *<\/span> 60000<\/span> +<\/span> 60000<\/span><\/p>\n

    const<\/span> results:<\/span> Date[<\/span>]<\/span> =<\/span> [<\/span>]<\/span>
    \n let<\/span> iter =<\/span> 0<\/span>
    \n let<\/span> cursor =<\/span> startMs<\/p>\n

    while<\/span> (<\/span>results.<\/span>length <<\/span> count &&<\/span> iter <<\/span> maxIter)<\/span> {<\/span>
    \n iter++<\/span>
    \n const<\/span> date =<\/span> new<\/span> Date<\/span>(<\/span>cursor)<\/span>
    \n if<\/span> (<\/span>matchDate<\/span>(<\/span>date,<\/span> fields,<\/span> mode)<\/span>)<\/span> {<\/span>
    \n results.<\/span>push<\/span>(<\/span>date)<\/span>
    \n }<\/span>
    \n cursor +=<\/span> stepMs
    \n }<\/span>
    \n return<\/span> results
    \n}<\/span><\/p>\n

    \u66b4\u529b\u904d\u5386\u7b80\u5355\u53ef\u9760，\u4f46\u6709\u6027\u80fd\u98ce\u9669\u2014\u2014\u5982\u679c\u8868\u8fbe\u5f0f\u5339\u914d\u9891\u7387\u5f88\u4f4e（\u5982 0 0 0 29 2 ?，2 \u6708 29 \u53f7\u624d\u6267\u884c），\u9700\u8981\u904d\u5386\u5f88\u591a\u6b21\u624d\u80fd\u627e\u5230\u5339\u914d\u3002maxIter \u8bbe\u4e3a 5 \u5e74\u7684\u79d2\u6570（\u7ea6 1.5 \u4ebf\u6b21），\u8d85\u8fc7\u5c31\u505c\u6b62，\u9632\u6b62\u6b7b\u5faa\u73af\u3002<\/p>\n

    2. \u5b57\u6bb5\u5339\u914d<\/h4>\n

    matchDate \u9010\u5b57\u6bb5\u68c0\u67e5\u65f6\u95f4\u662f\u5426\u5339\u914d：<\/p>\n

    function<\/span> matchDate<\/span>(<\/span>date:<\/span> Date,<\/span> fields:<\/span> Record<<\/span>string<\/span>,<\/span> ParsedField><\/span>,<\/span> mode:<\/span> CronMode)<\/span> {<\/span>
    \n if<\/span> (<\/span>mode ===<\/span> '6-field'<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>!<\/span>matchSimple<\/span>(<\/span>fields.<\/span>sec,<\/span> date.<\/span>getSeconds<\/span>(<\/span>)<\/span>)<\/span>)<\/span> return<\/span> false<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>!<\/span>matchSimple<\/span>(<\/span>fields.<\/span>min,<\/span> date.<\/span>getMinutes<\/span>(<\/span>)<\/span>)<\/span>)<\/span> return<\/span> false<\/span>
    \n if<\/span> (<\/span>!<\/span>matchSimple<\/span>(<\/span>fields.<\/span>hour,<\/span> date.<\/span>getHours<\/span>(<\/span>)<\/span>)<\/span>)<\/span> return<\/span> false<\/span>
    \n if<\/span> (<\/span>!<\/span>matchSimple<\/span>(<\/span>fields.<\/span>month,<\/span> date.<\/span>getMonth<\/span>(<\/span>)<\/span> +<\/span> 1<\/span>)<\/span>)<\/span> return<\/span> false<\/span><\/p>\n

    \/\/ \u65e5\u548c\u5468\u7684\u5339\u914d\u903b\u8f91（Quartz \u98ce\u683c）<\/span>
    \n return<\/span> matchDayAndWeek<\/span>(<\/span>fields.<\/span>day,<\/span> fields.<\/span>week,<\/span> date)<\/span>
    \n}<\/span><\/p>\n

    matchSimple \u6700\u7b80\u5355\u2014\u2014\u68c0\u67e5\u503c\u662f\u5426\u5728\u679a\u4e3e\u96c6\u5408\u4e2d：<\/p>\n

    function<\/span> matchSimple<\/span>(<\/span>field:<\/span> ParsedField,<\/span> value:<\/span> number<\/span>)<\/span>:<\/span> boolean<\/span> {<\/span>
    \n if<\/span> (<\/span>field.<\/span>any<\/span>)<\/span> return<\/span> true<\/span>
    \n if<\/span> (<\/span>field.<\/span>unspecified)<\/span> return<\/span> false<\/span>
    \n return<\/span> field.<\/span>values.<\/span>includes<\/span>(<\/span>value)<\/span>
    \n}<\/span><\/p>\n

    3. \u65e5\u548c\u5468\u7684\u5339\u914d<\/h4>\n

    \u65e5\u548c\u5468\u7684\u5339\u914d\u89c4\u5219\u662f Cron \u4e2d\u6700 tricky \u7684\u90e8\u5206\u3002Quartz \u7684\u89c4\u5219\u662f：<\/p>\n

      \n
    • \u5982\u679c\u65e5\u662f ?，\u53ea\u5339\u914d\u5468<\/li>\n
    • \u5982\u679c\u5468\u662f ?，\u53ea\u5339\u914d\u65e5<\/li>\n
    • \u5982\u679c\u4e24\u8005\u90fd\u6307\u5b9a\u5177\u4f53\u503c，\u662f"\u6216"\u7684\u5173\u7cfb\u2014\u2014\u65e5\u5339\u914d\u6216\u5468\u5339\u914d\u90fd\u7b97\u901a\u8fc7<\/li>\n<\/ul>\n

      function<\/span> matchDayAndWeek<\/span>(<\/span>dayField:<\/span> ParsedField,<\/span> weekField:<\/span> ParsedField,<\/span> date:<\/span> Date)<\/span> {<\/span>
      \n if<\/span> (<\/span>dayField.<\/span>unspecified)<\/span> return<\/span> matchWeek<\/span>(<\/span>weekField,<\/span> date)<\/span>
      \n if<\/span> (<\/span>weekField.<\/span>unspecified)<\/span> return<\/span> matchDay<\/span>(<\/span>dayField,<\/span> date)<\/span>
      \n if<\/span> (<\/span>dayField.<\/span>any<\/span> &&<\/span> weekField.<\/span>any<\/span>)<\/span> return<\/span> true<\/span>
      \n if<\/span> (<\/span>dayField.<\/span>any<\/span>)<\/span> return<\/span> matchWeek<\/span>(<\/span>weekField,<\/span> date)<\/span>
      \n if<\/span> (<\/span>weekField.<\/span>any<\/span>)<\/span> return<\/span> matchDay<\/span>(<\/span>dayField,<\/span> date)<\/span>
      \n \/\/ \u4e24\u8005\u90fd\u6307\u5b9a \u2192 "\u6216"\u5173\u7cfb<\/span>
      \n return<\/span> matchDay<\/span>(<\/span>dayField,<\/span> date)<\/span> ||<\/span> matchWeek<\/span>(<\/span>weekField,<\/span> date)<\/span>
      \n}<\/span><\/p>\n

      matchDay \u5904\u7406 L（\u6708\u672b）\u548c W（\u6700\u8fd1\u5de5\u4f5c\u65e5）：<\/p>\n

      function<\/span> matchDay<\/span>(<\/span>field:<\/span> ParsedField,<\/span> date:<\/span> Date)<\/span>:<\/span> boolean<\/span> {<\/span>
      \n if<\/span> (<\/span>field.<\/span>any<\/span>)<\/span> return<\/span> true<\/span>
      \n if<\/span> (<\/span>field.<\/span>unspecified)<\/span> return<\/span> false<\/span><\/p>\n

      \/\/ L = \u5f53\u6708\u6700\u540e\u4e00\u5929<\/span>
      \n if<\/span> (<\/span>field.<\/span>last &&<\/span> field.<\/span>lastValue ===<\/span> undefined<\/span>)<\/span> {<\/span>
      \n const<\/span> lastDay =<\/span> new<\/span> Date<\/span>(<\/span>date.<\/span>getFullYear<\/span>(<\/span>)<\/span>,<\/span> date.<\/span>getMonth<\/span>(<\/span>)<\/span> +<\/span> 1<\/span>,<\/span> 0<\/span>)<\/span>.<\/span>getDate<\/span>(<\/span>)<\/span>
      \n return<\/span> date.<\/span>getDate<\/span>(<\/span>)<\/span> ===<\/span> lastDay
      \n }<\/span><\/p>\n

      \/\/ \u666e\u901a\u503c\u5339\u914d<\/span>
      \n return<\/span> field.<\/span>values.<\/span>includes<\/span>(<\/span>date.<\/span>getDate<\/span>(<\/span>)<\/span>)<\/span>
      \n}<\/span><\/p>\n

      matchWeek \u5904\u7406 #（\u7b2c\u51e0\u4e2a\u5468\u51e0）\u548c L（\u6700\u540e\u4e00\u4e2a\u5468\u51e0）：<\/p>\n

      function<\/span> matchWeek<\/span>(<\/span>field:<\/span> ParsedField,<\/span> date:<\/span> Date)<\/span>:<\/span> boolean<\/span> {<\/span>
      \n if<\/span> (<\/span>field.<\/span>any<\/span>)<\/span> return<\/span> true<\/span>
      \n if<\/span> (<\/span>field.<\/span>unspecified)<\/span> return<\/span> false<\/span><\/p>\n

      \/\/ 6#3 = \u6bcf\u6708\u7b2c\u4e09\u4e2a\u5468\u516d<\/span>
      \n if<\/span> (<\/span>field.<\/span>hashWeek !==<\/span> undefined<\/span> &&<\/span> field.<\/span>hashN !==<\/span> undefined<\/span>)<\/span> {<\/span>
      \n if<\/span> (<\/span>date.<\/span>getDay<\/span>(<\/span>)<\/span> !==<\/span> field.<\/span>hashWeek)<\/span> return<\/span> false<\/span>
      \n const<\/span> nth =<\/span> Math.<\/span>floor<\/span>(<\/span>(<\/span>date.<\/span>getDate<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>)<\/span> \/<\/span> 7<\/span>)<\/span> +<\/span> 1<\/span>
      \n return<\/span> nth ===<\/span> field.<\/span>hashN
      \n }<\/span><\/p>\n

      \/\/ 6L = \u6bcf\u6708\u6700\u540e\u4e00\u4e2a\u5468\u516d<\/span>
      \n if<\/span> (<\/span>field.<\/span>last &&<\/span> field.<\/span>lastValue !==<\/span> undefined<\/span>)<\/span> {<\/span>
      \n if<\/span> (<\/span>date.<\/span>getDay<\/span>(<\/span>)<\/span> !==<\/span> field.<\/span>lastValue)<\/span> return<\/span> false<\/span>
      \n const<\/span> lastDay =<\/span> new<\/span> Date<\/span>(<\/span>date.<\/span>getFullYear<\/span>(<\/span>)<\/span>,<\/span> date.<\/span>getMonth<\/span>(<\/span>)<\/span> +<\/span> 1<\/span>,<\/span> 0<\/span>)<\/span>.<\/span>getDate<\/span>(<\/span>)<\/span>
      \n return<\/span> date.<\/span>getDate<\/span>(<\/span>)<\/span> +<\/span> 7<\/span> ><\/span> lastDay \/\/ \u672c\u6708\u6700\u540e7\u5929\u5185<\/span>
      \n }<\/span><\/p>\n

      return<\/span> field.<\/span>values.<\/span>includes<\/span>(<\/span>date.<\/span>getDay<\/span>(<\/span>)<\/span>)<\/span>
      \n}<\/span><\/p>\n

      # \u7684\u5339\u914d\u903b\u8f91：\u5148\u5224\u65ad\u661f\u671f\u662f\u5426\u5339\u914d，\u518d\u8ba1\u7b97\u5f53\u524d\u65e5\u671f\u662f\u672c\u6708\u7b2c\u51e0\u4e2a\u8be5\u661f\u671f\u3002Math.floor((day – 1) \/ 7) + 1 \u8fd9\u4e2a\u516c\u5f0f\u8ba1\u7b97"\u7b2c\u51e0\u4e2a"\u2014\u20141 \u53f7\u5230 7 \u53f7\u662f\u7b2c\u4e00\u4e2a，8 \u53f7\u5230 14 \u53f7\u662f\u7b2c\u4e8c\u4e2a，\u4ee5\u6b64\u7c7b\u63a8\u3002<\/p>\n

      L \u5728\u5468\u5b57\u6bb5\u4e2d\u7684\u5339\u914d：\u5224\u65ad\u5f53\u524d\u65e5\u671f\u52a0 7 \u5929\u662f\u5426\u8d85\u8fc7\u672c\u6708\u6700\u540e\u4e00\u5929，\u5982\u679c\u662f，\u8bf4\u660e\u8fd9\u662f\u672c\u6708\u6700\u540e\u4e00\u4e2a\u8be5\u661f\u671f\u51e0\u3002<\/p>\n

      \u56db\u3001\u5355\u5143\u6d4b\u8bd5\u8bbe\u8ba1<\/h3>\n

      \u7eaf\u51fd\u6570\u67b6\u6784\u7684\u597d\u5904\u662f\u6d4b\u8bd5\u53cb\u597d\u3002\u6838\u5fc3\u6d4b\u8bd5\u7528\u4f8b\u8986\u76d6\u4e09\u7c7b\u573a\u666f：<\/p>\n

      describe<\/span>(<\/span>'validateCron'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n \/\/ \u6b63\u5e38\u7528\u4f8b<\/span>
      \n it<\/span>(<\/span>'5\u6bb5\u6807\u51c6\u8868\u8fbe\u5f0f'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>validateCron<\/span>(<\/span>'0 2 * * *'<\/span>,<\/span> '5-field'<\/span>)<\/span>.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>true<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'6\u6bb5\u5de5\u4f5c\u65e5\u8868\u8fbe\u5f0f'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>validateCron<\/span>(<\/span>'0 30 9 ? * MON-FRI'<\/span>,<\/span> '6-field'<\/span>)<\/span>.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>true<\/span>)<\/span>
      \n }<\/span>)<\/span><\/p>\n

      \/\/ \u5f02\u5e38\u7528\u4f8b<\/span>
      \n it<\/span>(<\/span>'\u5b57\u6bb5\u6570\u4e0d\u5339\u914d'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n const<\/span> r =<\/span> validateCron<\/span>(<\/span>'0 2 * * *'<\/span>,<\/span> '6-field'<\/span>)<\/span>
      \n expect<\/span>(<\/span>r.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>false<\/span>)<\/span>
      \n expect<\/span>(<\/span>r.<\/span>error)<\/span>.<\/span>toContain<\/span>(<\/span>'6 \u4e2a\u5b57\u6bb5'<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'\u503c\u8d8a\u754c'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n const<\/span> r =<\/span> validateCron<\/span>(<\/span>'0 0 25 * * ?'<\/span>,<\/span> '6-field'<\/span>)<\/span>
      \n expect<\/span>(<\/span>r.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>false<\/span>)<\/span>
      \n expect<\/span>(<\/span>r.<\/span>error)<\/span>.<\/span>toContain<\/span>(<\/span>'\u8d8a\u754c'<\/span>)<\/span>
      \n }<\/span>)<\/span><\/p>\n

      \/\/ \u8fb9\u754c\u7528\u4f8b<\/span>
      \n it<\/span>(<\/span>'\u5468\u5b57\u6bb57\u7b49\u4e8e\u5468\u65e5'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>validateCron<\/span>(<\/span>'0 0 0 ? * 7'<\/span>,<\/span> '6-field'<\/span>)<\/span>.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>true<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'? \u53ea\u80fd\u5728\u65e5\/\u5468\u5b57\u6bb5'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>validateCron<\/span>(<\/span>'0 ? 0 * * ?'<\/span>,<\/span> '6-field'<\/span>)<\/span>.<\/span>valid)<\/span>.<\/span>toBe<\/span>(<\/span>false<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n}<\/span>)<\/span><\/p>\n

      describe<\/span>(<\/span>'explainCron'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n it<\/span>(<\/span>'\u6bcf\u5206\u949f'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>explainCron<\/span>(<\/span>'* * * * *'<\/span>,<\/span> '5-field'<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>'\u6bcf\u5206\u949f\u6267\u884c'<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'\u5de5\u4f5c\u65e59:30'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>explainCron<\/span>(<\/span>'0 30 9 ? * MON-FRI'<\/span>,<\/span> '6-field'<\/span>)<\/span>)<\/span>
      \n .<\/span>toBe<\/span>(<\/span>'\u6bcf\u5468\u4e00\u5230\u5468\u4e94 09:30 \u6267\u884c'<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'\u6bcf\u6708\u6700\u540e\u4e00\u5929'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n expect<\/span>(<\/span>explainCron<\/span>(<\/span>'0 0 0 L * ?'<\/span>,<\/span> '6-field'<\/span>)<\/span>)<\/span>
      \n .<\/span>toContain<\/span>(<\/span>'\u6bcf\u6708\u6700\u540e\u4e00\u5929'<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n}<\/span>)<\/span><\/p>\n

      describe<\/span>(<\/span>'getNextTriggerTimes'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n it<\/span>(<\/span>'\u6bcf\u5206\u949f\u5e94\u8fd4\u56de\u8fde\u7eed\u5206\u949f'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n const<\/span> times =<\/span> getNextTriggerTimes<\/span>(<\/span>'* * * * *'<\/span>,<\/span> '5-field'<\/span>,<\/span> 3<\/span>,<\/span> new<\/span> Date<\/span>(<\/span>'2026-01-01T00:00:00'<\/span>)<\/span>)<\/span>
      \n expect<\/span>(<\/span>times)<\/span>.<\/span>toHaveLength<\/span>(<\/span>3<\/span>)<\/span>
      \n expect<\/span>(<\/span>times[<\/span>0<\/span>]<\/span>.<\/span>getMinutes<\/span>(<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>1<\/span>)<\/span>
      \n expect<\/span>(<\/span>times[<\/span>1<\/span>]<\/span>.<\/span>getMinutes<\/span>(<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>2<\/span>)<\/span>
      \n }<\/span>)<\/span>
      \n it<\/span>(<\/span>'2\u670829\u53f7\u89e6\u53d1\u65f6\u95f4\u6b63\u786e'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
      \n const<\/span> times =<\/span> getNextTriggerTimes<\/span>(<\/span>'0 0 0 29 2 ?'<\/span>,<\/span> '6-field'<\/span>,<\/span> 1<\/span>,<\/span> new<\/span> Date<\/span>(<\/span>'2026-01-01'<\/span>)<\/span>)<\/span>
      \n expect<\/span>(<\/span>times[<\/span>0<\/span>]<\/span>.<\/span>getMonth<\/span>(<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>1<\/span>)<\/span> \/\/ 2\u6708<\/span>
      \n expect<\/span>(<\/span>times[<\/span>0<\/span>]<\/span>.<\/span>getDate<\/span>(<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>29<\/span>)<\/span>
      \n expect<\/span>(<\/span>times[<\/span>0<\/span>]<\/span>.<\/span>getFullYear<\/span>(<\/span>)<\/span>)<\/span>.<\/span>toBe<\/span>(<\/span>2028<\/span>)<\/span> \/\/ 2028\u662f\u95f0\u5e74<\/span>
      \n }<\/span>)<\/span>
      \n}<\/span>)<\/span><\/p>\n

      \u8fb9\u754c\u573a\u666f\u662f\u6700\u6709\u4ef7\u503c\u7684\u6d4b\u8bd5\u2014\u20142 \u6708 29 \u53f7\u3001\u6708\u672b 31 \u53f7\u3001L \u5728\u4e0d\u540c\u6708\u4efd\u7684\u5b9e\u9645\u503c\u3001# \u7684"\u7b2c\u51e0\u4e2a"\u8ba1\u7b97\u662f\u5426\u6b63\u786e\u3002\u8fd9\u4e9b\u8fb9\u754c\u7528\u4f8b\u662f\u624b\u52a8\u8c03\u8bd5\u6700\u5bb9\u6613\u9057\u6f0f\u7684\u5730\u65b9\u3002<\/p>\n

      \u4e94\u3001\u6027\u80fd\u4f18\u5316\u601d\u8003<\/h3>\n

      \u66b4\u529b\u904d\u5386\u6cd5\u5728\u5927\u591a\u6570\u573a\u666f\u4e0b\u591f\u7528，\u4f46\u6781\u7aef\u573a\u666f\u6709\u6027\u80fd\u95ee\u9898\u30020 0 0 29 2 ?（2 \u6708 29 \u53f7\u6267\u884c）\u9700\u8981\u904d\u5386\u7ea6 4 \u5e74\u624d\u80fd\u627e\u5230\u4e00\u6b21\u5339\u914d，6 \u6bb5\u6a21\u5f0f\u4e0b\u6bcf\u79d2\u4e00\u6b21\u8fed\u4ee3，4 \u5e74\u7ea6 1.2 \u4ebf\u6b21\u5faa\u73af\u3002<\/p>\n

      \u4f18\u5316\u65b9\u5411：<\/p>\n

    • \u5b57\u6bb5\u7ea7\u8df3\u8fc7：\u5982\u679c\u5f53\u524d\u6708\u4efd\u4e0d\u5339\u914d，\u76f4\u63a5\u8df3\u5230\u4e0b\u4e2a\u6708 1 \u53f7 0 \u70b9，\u4e0d\u9010\u79d2\u904d\u5386\u6574\u4e2a\u6708<\/li>\n
    • \u4f18\u5148\u68c0\u67e5\u5927\u7c92\u5ea6\u5b57\u6bb5：\u5148\u68c0\u67e5\u6708\u3001\u65e5，\u518d\u68c0\u67e5\u65f6\u3001\u5206\u3001\u79d2，\u5927\u7c92\u5ea6\u4e0d\u5339\u914d\u5c31\u8df3\u8fc7\u5c0f\u7c92\u5ea6<\/li>\n
    • \u7f13\u5b58\u89e3\u6790\u7ed3\u679c：\u540c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u591a\u6b21\u8c03\u7528\u65f6\u590d\u7528 ParsedField \u5bf9\u8c61<\/li>\n

      \u5b9e\u9645\u9879\u76ee\u4e2d，\u524d\u7aef\u5de5\u5177\u8c03\u7528\u9891\u7387\u4e0d\u9ad8，5 \u5e74\u4e0a\u9650\u7684\u66b4\u529b\u904d\u5386\u5df2\u8db3\u591f\u3002\u5982\u679c\u7528\u4e8e\u540e\u7aef\u8c03\u5ea6\u5f15\u64ce，\u5efa\u8bae\u5b9e\u73b0\u5b57\u6bb5\u7ea7\u8df3\u8fc7\u4f18\u5316\u3002<\/p>\n

      \u5b8c\u6574\u4ee3\u7801\u4e0e\u5728\u7ebf\u4f53\u9a8c<\/h3>\n

      \u672c\u6587\u62c6\u89e3\u7684\u4ee3\u7801\u5b8c\u6574\u5b9e\u73b0\u5728 PanziTool GitHub \u4ed3\u5e93 \u7684 frontend\/utils\/tools\/cron.ts \u6587\u4ef6\u4e2d，\u7ea6 900 \u884c TypeScript \u4ee3\u7801，\u65e0\u5916\u90e8\u4f9d\u8d56\u3002Vue \u7ec4\u4ef6 CronTool.vue \u8d1f\u8d23\u4ea4\u4e92\u5c42，\u8c03\u7528\u8fd9\u4e09\u4e2a\u7eaf\u51fd\u6570\u5b8c\u6210\u6821\u9a8c\u3001\u89e3\u91ca\u548c\u89e6\u53d1\u65f6\u95f4\u9884\u89c8\u3002<\/p>\n

      \u5982\u679c\u4f60\u60f3\u4f53\u9a8c\u6700\u7ec8\u6548\u679c，\u8bbf\u95ee \u76d8\u5b50\u5de5\u5177\u7ad9 Cron \u8868\u8fbe\u5f0f\u751f\u6210\u5668，\u8f93\u5165\u4efb\u610f\u8868\u8fbe\u5f0f\u5373\u53ef\u770b\u5230：<\/p>\n

        \n
      • \u5b9e\u65f6\u6821\u9a8c\u7ed3\u679c，\u51fa\u9519\u65f6\u6307\u660e\u5177\u4f53\u5b57\u6bb5\u548c\u539f\u56e0<\/li>\n
      • \u4e2d\u6587\u89e3\u91ca，\u8986\u76d6\u5de5\u4f5c\u65e5\u3001\u6708\u672b\u3001\u6bcf N \u5206\u949f\u7b49\u9ad8\u9891\u6a21\u5f0f<\/li>\n
      • \u672a\u6765 5 \u6b21\u89e6\u53d1\u65f6\u95f4\u9884\u89c8（\u53ef\u8c03\u6b21\u6570），\u9a8c\u8bc1 0 0 0 29 2 ? \u7b49\u8fb9\u754c\u573a\u666f \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u8fd9\u4e2a\u7cfb\u5217\u4ece\u57fa\u7840\u8bed\u6cd5\u5230\u7279\u6b8a\u5b57\u7b26\u3001\u8de8\u6846\u67b6\u5dee\u5f02\u3001\u751f\u4ea7\u6a21\u677f\u3001\u8c03\u8bd5\u6307\u5357，\u6700\u540e\u56de\u5230\u4ee3\u7801\u5b9e\u73b0，\u5f62\u6210"\u7528\u5de5\u5177 \u2192 \u61c2\u539f\u7406 \u2192 \u9020\u5de5\u5177"\u7684\u5b8c\u6574\u95ed\u73af\u3002\u5e0c\u671b\u8fd9\u4e2a\u7cfb\u5217\u80fd\u5e2e\u4f60\u771f\u6b63\u641e\u61c2 Cron \u8868\u8fbe\u5f0f\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

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