//引用該模塊
var path = require("path");

//對(duì)window系統(tǒng)，目錄分隔為'\', 對(duì)于UNIX系統(tǒng)，分隔符為'/'，針對(duì)'..'返回上一級(jí)；/與\\都被統(tǒng)一轉(zhuǎn)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(yīng)用程序?yàn)槠瘘c(diǎn)，根據(jù)參數(shù)字符串解析出一個(gè)絕對(duì)路徑

/**
 * path 必須至少一個(gè)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(duì)關(guān)系

/**
 * from 當(dāng)前路徑，并且方法返回值是基于from指定到to的相對(duì)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(duì)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(qǐng)使用'.ext'方式來(lái)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);