路徑組成

path.dirname(p)

返回路徑p所在的目錄

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

path.basename(p[, ext])

返回路徑的最后一個部分，即文件名。參數(shù)ext為需要截掉的后綴內(nèi)容　

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

path.extname(p)

返回路徑p的擴(kuò)展名，從最后一個'.'到字符串的末尾。如果最后一個部分沒有'.'，或者路徑是以'.'開頭，則返回空字符串

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

分隔符

path.sep

返回對應(yīng)平臺下的文件分隔符，win下為'/'，*nix下為'/'

var path = require('path');console.log(path.sep); // win下為/，*nix下為/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系統(tǒng)下會返回['foo','bar','baz']

path.delimiter

返回對應(yīng)平臺下的路徑分隔符，win下為';'，*nix下為':'

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

規(guī)范化

path.normalize(p)

規(guī)范化路徑，處理冗余的“..”、“.”、“/”字符。發(fā)現(xiàn)多個斜杠時，會替換成一個斜杠。當(dāng)路徑末尾包含一個斜杠時，保留。Windows系統(tǒng)使用反斜杠　

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

path.join([path1], [path2], [...])

將多個路徑結(jié)合在一起，并轉(zhuǎn)換為規(guī)范化路徑　

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