express next function

nodejs 里面的next()这个函数调用的作用是什么呢?

 

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var express = require('express'); var app = express(); var myLogger = function(req, res, next){   console.log("Logger--");   next(); } app.use(myLogger);   app.get('/', function(req, res, next){ //  console.log(req);   console.log('/');   var buffer = new Buffer(6);   buffer.fill('春天');   console.log(buffer.toString());   next();     res.send({msg: 'hello,world!'}); }, function(req, res, next){   console.log('next');   next(); }, function(){   console.log('next 2'); })   app.get('/user', function(req, res){   console.log('/user');   res.send('/user'); }); var server = app.listen(8081, '0.0.0.0', function(){   var host = server.address().address;   var port = server.address().port;   console.log('http://%s:%s', host, port); });

　　

参考： https://stackoverflow.com/questions/5384526/javascript-node-js-next