nodejs基础：引用模块实例以及exports和module.exports区别

本代码参考菜鸟教程

//hello.js 
function Hello() { 
    var name; 
    this.setName = function(thyName) { 
        name = thyName; 
    }; 
    this.sayHello = function() { 
        console.log('Hello ' + name); 
    }; 
}; 
module.exports = Hello;

//main.js 
var Hello = require('./hello'); 
hello = new Hello(); 
hello.setName('BYVoid'); 
hello.sayHello(); 

更多参考：https://blog.csdn.net/u011863822/article/details/125037838