nodejs 之 path module

深藏阁楼爱情的钟 2022-06-04 08:49 156阅读 0赞

var path = require('path');  
/\*\*  
   path.normalize(p) 标准化路径字符串，尤其是‘..’和‘.’部分  
   多个斜杠，被替换为单斜杆;路径末尾存在斜杆就隐藏起来;在windows上反斜杠可以使用  
\*/  
 console.log('path.normalize:'+path.normalize('/foo/bar//baz/asdf/qux/..'));  
 // path.normalize:\\foo\\bar\\baz\\asdf

/\*\*  
   path.join(\[path1\]\[,path2\]\[...\])  
   将所有的参数合并起来，并标准化后返回一个path  
   空字符串被忽略  
\*/  
 console.log('path.join:'+path.join('/foo', 'bar', 'baz/asdf', 'quux', '..'));  
 // path.join:\\foo\\bar\\baz\\asdf

console.log('path.join:'+path.join('foo', \{\}, 'bar'));  
 // path.join:foo\\bar

/\*\*  
   path.resolve(\[from ...\], to)  
\*/  
  console.log('path.resolve:'+path.resolve('foo/bar', '/tmp/file/', '..', 'a/../subfile'));  
  //path.resolve:E:\\tmp\\subfile

console.log('path.resolve:'+path.resolve('/foo/bar', './baz'));  
  // path.resolve:E:\\foo\\bar\\baz

console.log('path.resolve:'+path.resolve('/foo/bar', '/tmp/file/'));  
 // path.resolve:E:\\tmp\\file

console.log('path.resolve:'+path.resolve('wwwroot', 'static\_files/png/', '../gif/image.gif'));  
  // 当前文件路径在 E:/hellow-world/npm/Path-1, 那返回的是：  
  //path.resolve:E:\\hello-world\\npm\\Path-1\\wwwroot\\static\_files\\gif\\image.gif  
   
/\*\*  
  path.relative(from, to)\#  
  解决从from到to之间的相关联路径  
  当有两个绝对路径时，我们想得到一个到另一个的相关联路径  
  那该方法可以帮我们实现  
   
  path.resolve(from, path.relative(from, to)) == path.resolve(to)  
\*/  
  console.log('path.relative:'+path.relative('C:\\\\orandea\\\\test\\\\aaa', 'C:\\\\orandea\\\\impl\\\\bbb'));  
  // path.relative:..\\..\\impl\\bbb

console.log('path.relative:'+path.relative('/data/orandea/test/aaa', '/data/orandea/impl/bbb'));  
  // path.relative:..\\..\\impl\\bbb

/\*\*  
   path.sep  
   特定平台的文件分隔符 ‘\\\\’or '/'  
\*/  
//适合linux的实例  
  console.log('path.sep:'+'foo/bar/baz'.split(path.sep));  
  //path.sep:foo/bar/baz  
   
//适合windows的实例  
 console.log('path.sep:'+'foo\\\\bar\\\\baz'.split(path.sep));  
//path.sep:foo,bar,baz

/\*\*  
   path.extname(p)方法路径的扩展名  
\*/  
  console.log('path.extname:'+path.extname('index.html'));  
  // path.extname:.html

console.log('path.extname:'+path.extname('index.'));  
  // path.extname:.

console.log('path.extname:'+path.extname('index'));  
  // path.extname:

/\*\*  
 path.basename(p, \[ext\])  
 返回path最后那部分  
\*/  
 console.log('path.basename:'+ path.basename('/foo/bar/baz/asdf/quux.html'));  
  // path.basename:quux.html

console.log('path.basename:'+path.basename('/foo/bar/baz/asdf/quux.html', '.html'));  
  // path.basename:quux

/\*\*  
  path.dirname(p)  
  返回path路径的目录  
\*/  
  console.log('path.dirname:'+path.dirname('/foo/bar/baz/asdf/quux'));  
  // path.dirname:/foo/bar/baz/asdf