一、path模块的引入。
直接引用。node中自带的模块
const path = require('path');
二、path.join(path1,path2,path3.......)
作用:将路径片段使用特定的分隔符(window:\)连接起来形成路径,并规范化生成的路径。若任意一个路径片段类型错误,会报错。
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);
三、path.resolve([from...],to)
作用:把一个路径或路径片段的序列解析为一个绝对路径。相当于执行cd操作。
/被解析为根目录。
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);
输入
const path1 = path.resolve(ROOT_PATH, '/docs');
const path2 = path.resolve(ROOT_PATH, './docs');
const path3 = path.join(ROOT_PATH, './docs');
const path4 = path.join(ROOT_PATH, '/docs');
const path5 = path.join(ROOT_PATH, 'docs');
console.log(path0);
console.log(path1);
console.log(path2);
console.log(path3);
console.log(path4);
console.log(path5);
输出
G:\docs
G:\编程测试练习\11-18\docs
G:\编程测试练习\11-18\docs
G:\编程测试练习\11-18\docs
G:\编程测试练习\11-18\docs
总结
- path.resolve 中 'doc' 和 './doc' 等价。
- path.join 中 'doc' 、'/doc' 和 './doc' 三者等价。