使用node.js模块 node

使用node.js模块 node

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

1、每小时的第42分钟执行 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 

www.npmjs/package/node-schedule