深入理解node.js之path模块

//引用该模块var path = require("path");

//对window系统，目录分隔为'/', 对于UNIX系统，分隔符为'/'，针对'..'返回上一级；/与//都被统一转换//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] 路径或表示目录的字符， */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]);//以应用程序为起点，根据参数字符串解析出一个绝对路径/** * path 必须至少一个路径字符串值 * [pathn] 可选路径字符串 */var myPath = path.resolve('path1', 'path2', 'a/b//c/');console.log(myPath);//E:/workspace/NodeJS/path1/path2/a/b/c

//path.relative(from, to);//获取两路径之间的相对关系/** * from 当前路径，并且方法返回值是基于from指定到to的相对路径 * to  到哪路径， */var from = 'c://from//a//',  to = 'c:/test/b';var _path = path.relative(from, to);console.log(_path); //../../test/b; 表示从from到to的相对路径

// 获取路径中目录名var myPath = path.dirname(__dirname + '/test/util you.mp3');console.log(myPath);

// 获取路径中文件名,后缀是可选的，如果加，请使用'.ext'方式来匹配，则返回值中不包括后缀名；var myPath = path.basename(__dirname + '/test/util you.mp3', '.mp3');console.log(myPath);