Detailed introduction to the path PATH module of nodeJS-JS Tutorial-php.cn

本篇文章主要介绍了详解nodeJS之路径PATH模块，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

前面的话

path模块包含一系列处理和转换文件路径的工具集，通过require('path') 可用来访问这个模块。本文将详细介绍path模块

路径组成

【path.dirname(p)】

返回路径p所在的目录

var path = require('path'); console.log(path.dirname('/foo/bar/baz/asdf/a.txt')); // /foo/bar/baz/asdf console.log(path.dirname('/foo/bar/baz/asdf/')); // /foo/bar/baz console.log(path.dirname('C:/test/aaa')); // C:/test

Copy after login

【path.basename(p[, ext])】

返回路径的最后一个部分，即文件名。参数ext为需要截掉的后缀内容　

var path = require('path'); console.log(path.basename('/foo/bar/baz/asdf/a.txt')); // a.txt console.log(path.basename('/foo/bar/baz/asdf/a.txt','.txt')); // a console.log(path.basename('/foo/bar/baz/asdf/')); // asdf console.log(path.basename('C:/test/aaa')); // aaa

Copy after login

【path.extname(p)】

返回路径p的扩展名，从最后一个'.'到字符串的末尾。如果最后一个部分没有'.'，或者路径是以'.'开头，则返回空字符串

var path = require('path'); console.log(path.extname('/foo/bar/baz/asdf/a.txt')); // .txt console.log(path.extname('/foo/bar/baz/asdf/a.txt.b')); // .b console.log(path.extname('/foo/bar/baz/asdf/a.')); // . console.log(path.extname('C:/test/aaa/.')); // '' console.log(path.extname('C:/test/aaa')); // ''

Copy after login

分隔符

【path.sep】

返回对应平台下的文件分隔符，win下为'\'，*nix下为'/'

var path = require('path'); console.log(path.sep); // win下为\，*nix下为/ console.log('foo\\bar\\baz'.split(path.sep)); // [ 'foo', 'bar', 'baz' ] console.log('foo/bar/baz'.split(path.sep)); // win下返回['foo/bar/baz']，但在*nix系统下会返回['foo','bar','baz']

Copy after login

【path.delimiter】

返回对应平台下的路径分隔符，win下为';'，*nix下为':'

var path = require('path'); console.log(path.delimiter); //win下为“;”，*nix下为“:” console.log(path.sep); // win下为\，*nix下为/

Copy after login

规范化

【path.normalize(p)】

规范化路径，处理冗余的“..”、“.”、“/”字符。发现多个斜杠时，会替换成一个斜杠。当路径末尾包含一个斜杠时，保留。Windows系统使用反斜杠　

var path = require('path'); console.log(path.normalize('a/b/c/../user/bin'));//a\b\user\bin console.log(path.normalize('a/b/c///../user/bin/'));//a\b\user\bin\ console.log(path.normalize('a/b/c/../../user/bin'));//a\user\bin console.log(path.normalize('a/b/c/.././///../user/bin/..'));//a\user console.log(path.normalize('a/b/c/../../user/bin/../../'));//a\ console.log(path.normalize('a/../../user/bin/../../'));//..\ console.log(path.normalize('a/../../user/bin/../../../../'));//..\..\..\ console.log(path.normalize('./a/.././user/bin/./'));//user\bin\

Copy after login

【path.join([path1], [path2], [...])】

将多个路径结合在一起，并转换为规范化路径　

var path = require('path'); console.log(path.join('////./a', 'b////c', 'user/'));//\a\b\c\user console.log(path.join('a', '../../', 'user/'));//..\user\

Copy after login

绝对和相对

【path.resolve([from ...], to)】

从源地址 from 到目的地址 to 的绝对路径，类似在shell里执行一系列的cd命令

path.resolve('foo/bar', '/tmp/file/', '..', 'a/../subfile')

Copy after login

类似于:

cd foo/bar cd /tmp/file/ cd .. cd a/../subfile pwd

Copy after login

[注意]如果某个from或to参数是绝对路径（比如 'E:/abc'，或是以“/”开头的路径），则将忽略之前的from参数

var path = require('path'); console.log(path.resolve('.', 'testFiles/..', 'trdLayer'));//D:\project\trdLayer console.log(path.resolve('..', 'testFiles', 'a.txt'));//D:\testFiles\a.txt console.log(path.resolve('D:', 'abc', 'D:/a'));//D:\a console.log(path.resolve('abc', 'ok.gif'));//D:\project\abc\ok.gif console.log(path.resolve('abc', '..', 'a/../subfile')); //D:\project\subfile

Copy after login

【path.isAbsolute(path)】

path是一个绝对路径(比如 'E:/abc')，或者是以“/”开头的路径，二者都会返回true

var path = require('path'); console.log(path.isAbsolute('../testFiles/secLayer'));//false console.log(path.isAbsolute('./join.js'));//false console.log(path.isAbsolute('temp'));//false console.log(path.isAbsolute('/temp/../..'));//true console.log(path.isAbsolute('E:/github/nodeAPI/abc/efg'));//true console.log(path.isAbsolute('///temp123'));//true

Copy after login

【path.relative(from, to)】

获取从 from 到 to 的相对路径，可以看作 path.resolve 的相反实现

path.resolve(from, path.relative(from, to)) == path.resolve(to) var path = require('path'); console.log(path.relative('C:\\\test', 'C:\\\impl\\bbb'));//..\impl\bbb console.log(path.relative('C:/test/aaa', 'C:/bbb'));//..\..\bbb console.log(path.relative('C:/test/aaa', 'D:/bbb'));//D:\bbb

Copy after login

The above is the detailed content of Detailed introduction to the path PATH module of nodeJS. For more information, please follow other related articles on the PHP Chinese website!