首页 Node.js核心模块手册

join(string, string...)
string         字符串
string...      可选，多个字符串，逗号","分割

返回值：组合成路径的字符串

var path = require("path");
var s = path.join(__dirname, "a", "b", "c");
console.log(s);  //结果：E:\nodejs\a\b\c