Detailed explanation of node.js path module

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Release: 2018-03-06 16:43:21
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这次给大家带来node.js的path模块详解,使用node.js的path模块的注意事项有哪些,下面就是实战案例,一起来看一下。

//引用该模块var path =require("path");

1、路径解析,得到规范化的路径格式

//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
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2、路径结合、合并,路径最后不会带目录分隔符

//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
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3、获取绝对路径

//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
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4、获取相对路径

//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
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5、path.dirname(p)

// 获取路径中目录名var myPath = path.dirname(dirname + '/test/util you.mp3');console.log(myPath);
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6、path.basename(path, [ext])

// 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);
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7、path.extname(path)

//获取路径中的扩展名,如果没有'.',则返回空
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8、path.sep属性

//返回操作系统中文件分隔符; window是'\\', Unix是'/'
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9、path.delimiter属性

//返回操作系统中目录分隔符,如window是';', Unix中是':'
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相信看了这些案例你已经掌握了方法,更多精彩请关注php中文网其它相关文章!

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