1.安装
命令: npm install node-schedule
2.使用
node-schedule做定时任务有《两种》方式可以选择
2.1 Date-based Scheduling 方式
1、确定时间,例如:2017年11月21日,5:30
var schedule = require('node-schedule');
var date = new Date(2017, 11, 21, 5, 30, 0);
var j = schedule.scheduleJob(date, function(){
console.log('The world is going to end today.');
});
j.cancel(); //取消预设计划
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 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 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);
});
2.2 Cron-style Scheduling 方式
时间格式如下图:6个星号
var schedule = require('node-schedule');
//时间格式为 ‘42 * * * *’ 或者 ‘0 42 * * * *’,
var j = schedule.scheduleJob('42 * * * *', function(){
console.log('The answer to life, the universe, and everything!');
});
2、每周五的12:42:00执行
var schedule = require('node-schedule');
//时间格式为 ‘42 12 * * 5’ 或者 ‘0 42 12 * * 5’,
var j = schedule.scheduleJob('42 12 * * 5', function(){
console.log('The answer to life, the universe, and everything!');
});
3.官方网站
https://www.npmjs/package/node-schedule
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使用node.js模块 node-schedule做定时任务
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