一、path模塊的引入

直接引用。node中自帶的模塊

const path = require('path');

二、path.join(path1，path2，path3.......)

作用：將路徑片段使用特定的分隔符（window：\）連接起來(lái)形成路徑，并規(guī)范化生成的路徑。若任意一個(gè)路徑片段類型錯(cuò)誤，會(huì)報(bào)錯(cuò)。

const path = require('path');
let myPath = path.join(__dirname,'/img/so');
let myPath2 = path.join(__dirname,'./img/so');
let myPath3=path.join('/foo', 'bar', 'baz/asdf', 'quux', '..');
 
 
console.log(__dirname);           
console.log(myPath);    
console.log(myPath2);   
console.log(myPath3);

join()---結(jié)果

三、path.resolve([from...],to)

作用：把一個(gè)路徑或路徑片段的序列解析為一個(gè)絕對(duì)路徑。相當(dāng)于執(zhí)行cd操作。

‘ / ’被解析為根目錄。

let myPath = path.resolve(__dirname,'/img/so');
let myPath2 = path.resolve(__dirname,'./img/so');
let myPath3=path.resolve('/foo/bar', './baz');
let myPath4=path.resolve('/foo/bar', '/tmp/file/');
 
console.log(__dirname);           
console.log(myPath);    
console.log(myPath2);   
console.log(myPath3);  
console.log(myPath4);

resolve()---結(jié)果