//引用該模塊var path = require("path");

//對window系統，目錄分隔為'/', 對于UNIX系統，分隔符為'/'，針對'..'返回上一級；/與//都被統一轉換//path.normalize(p);var myPath = path.normalize(__dirname + '/test/a//b//../c/utilyou.mp3');console.log(myPath); //windows: E:/workspace/NodeJS/app/fs/test/a/c/utilyou.mp3

//path.join([path1],[path2]..[pathn]);/** * [path1] 路徑或表示目錄的字符， */var path1 = 'path1',  path2 = 'path2//pp//',  path3 = '../path3';var myPath = path.join(path1, path2, path3);console.log(myPath); //path1/path2/path3

//path.resolve(path1, [path2]..[pathn]);//以應用程序為起點，根據參數字符串解析出一個絕對路徑/** * path 必須至少一個路徑字符串值 * [pathn] 可選路徑字符串 */var myPath = path.resolve('path1', 'path2', 'a/b//c/');console.log(myPath);//E:/workspace/NodeJS/path1/path2/a/b/c

//path.relative(from, to);//獲取兩路徑之間的相對關系/** * from 當前路徑，并且方法返回值是基于from指定到to的相對路徑 * to  到哪路徑， */var from = 'c://from//a//',  to = 'c:/test/b';var _path = path.relative(from, to);console.log(_path); //../../test/b; 表示從from到to的相對路徑

// 獲取路徑中目錄名var myPath = path.dirname(__dirname + '/test/util you.mp3');console.log(myPath);

// 獲取路徑中文件名,后綴是可選的，如果加，請使用'.ext'方式來匹配，則返回值中不包括后綴名；var myPath = path.basename(__dirname + '/test/util you.mp3', '.mp3');console.log(myPath);