摘要:有时我们需要在每天的固定时间执行某个脚本,或者在某个固定时间执行某个任务。NodeJS中的 node-schedule 可以很好的实现定时任务。
1.安装
npm install node-schedule
2.各种时间段代码实现
1)确定时间,例如:2012年11月21日,5:30
var schedule = require('node-schedule'); var date = new Date(2012, 11, 21, 5, 30, 0); var j = schedule.scheduleJob(date, function(){ console.log('The world is going to end today.'); });
2)每小时的固定分钟,例如:每个小时的42分钟
var schedule = require('node-schedule'); var rule = new schedule.RecurrenceRule(); rule.minute = 42; var j = schedule.scheduleJob(rule, function(){ console.log('The answer to life, the universe, and everything!'); });
3)一个星期中的某些天的某个时刻,例如:每周四,周五,周六,周天的17点
var schedule = require('node-schedule');
var rule = new schedule.RecurrenceRule();
rule.dayOfWeek = [0, new schedule.Range(4, 6)];
rule.hour = 17;
rule.minute = 0;
var j = schedule.scheduleJob(rule, function(){
console.log('Today is recognized by Rebecca Black!');
});
4)每秒执行
var schedule = require('node-schedule'); var rule = new schedule.RecurrenceRule(); var times = []; for(var i=1; i<60; i++){ times.push(i); } rule.second = times; var c=0; var j = schedule.scheduleJob(rule, function(){ c++; console.log(c); });