Node.js fs.statSync()用法及代碼示例

fs.statSync()方法用於異步返回有關給定文件路徑的信息。返回的fs.Stat對象具有多個字段和方法，以獲取有關文件的更多詳細信息。

用法:

fs.statSync( path, options )

參數：該方法接受上述和以下所述的兩個參數：

• path:它包含必須檢查的文件的路徑。它可以是字符串，緩衝區或URL。
• options:該對象可用於指定將影響輸出的可選參數。它具有一個可選參數：
  • bigint:它是一個布爾值，它指定fs.Stats對象中返回的數值是否為bigint。默認值為false。

返回值：它返回一個Stats對象，其中包含文件路徑的詳細信息。

以下示例說明了Node.js中的fs.statSync()方法：

範例1：本示例使用fs.statSync()方法獲取路徑的詳細信息。

// Node.js program to demonstrate the 
// fs.statSync() method 
  
// Import the filesystem module 
const fs = require('fs'); 
  
// Getting information for a file 
statsObj = fs.statSync("test_file.txt"); 
  
console.log(statsObj);  
console.log("Path is file:", statsObj.isFile()); 
console.log("Path is directory:", statsObj.isDirectory()); 
  
// Getting information for a directory 
statsObj = fs.statSync("test_directory"); 
  
console.log(statsObj); 
console.log("Path is file:", statsObj.isFile()); 
console.log("Path is directory:", statsObj.isDirectory());

輸出：

Stats {
  dev:3229478529,
  mode:33206,
  nlink:1,
  uid:0,
  gid:0,
  rdev:0,
  blksize:4096,
  ino:1970324837039946,
  size:0,
  blocks:0,
  atimeMs:1582306776282,
  mtimeMs:1582482953967,
  ctimeMs:1582482953968.2532,
  birthtimeMs:1582306776282.142,
  atime:2020-02-21T17:39:36.282Z,
  mtime:2020-02-23T18:35:53.967Z,
  ctime:2020-02-23T18:35:53.968Z,
  birthtime:2020-02-21T17:39:36.282Z
}
Path is file:true
Path is directory:false
Stats {
  dev:3229478529,
  mode:16822,
  nlink:1,
  uid:0,
  gid:0,
  rdev:0,
  blksize:4096,
  ino:562949953486669,
  size:0,
  blocks:0,
  atimeMs:1582482965037.8445,
  mtimeMs:1581074249467.7114,
  ctimeMs:1582482964979.8303,
  birthtimeMs:1582306776288.1958,
  atime:2020-02-23T18:36:05.038Z,
  mtime:2020-02-07T11:17:29.468Z,
  ctime:2020-02-23T18:36:04.980Z,
  birthtime:2020-02-21T17:39:36.288Z
}
Path is file:false
Path is directory:true

範例2：本示例使用fs.statSync()方法使用bigint選項獲取文件的詳細信息。

// Node.js program to demonstrate the 
// fs.stat() method 
  
// Import the filesystem module 
const fs = require('fs'); 
  
statsObj = fs.statSync("test_file.txt"); 
console.log(statsObj); 
  
// Using the bigint option to return 
// the values in big integer format 
statsObj = fs.statSync("test_file.txt", {bigint:true}); 
console.log(statsObj);

輸出：

Stats {
  dev:3229478529,
  mode:33206,
  nlink:1,
  uid:0,
  gid:0,
  rdev:0,
  blksize:4096,
  ino:1970324837039946,
  size:0,
  blocks:0,
  atimeMs:1582306776282,
  mtimeMs:1582482953967,
  ctimeMs:1582482953968.2532,
  birthtimeMs:1582306776282.142,
  atime:2020-02-21T17:39:36.282Z,
  mtime:2020-02-23T18:35:53.967Z,
  ctime:2020-02-23T18:35:53.968Z,
  birthtime:2020-02-21T17:39:36.282Z
}
BigIntStats {
  dev:3229478529n,
  mode:33206n,
  nlink:1n,
  uid:0n,
  gid:0n,
  rdev:0n,
  blksize:4096n,
  ino:1970324837039946n,
  size:0n,
  blocks:0n,
  atimeMs:1582306776282n,
  mtimeMs:1582482953967n,
  ctimeMs:1582482953968n,
  birthtimeMs:1582306776282n,
  atimeNs:1582306776282000000n,
  mtimeNs:1582482953967000000n,
  ctimeNs:1582482953968253100n,
  birthtimeNs:1582306776282142200n,
  atime:2020-02-21T17:39:36.282Z,
  mtime:2020-02-23T18:35:53.967Z,
  ctime:2020-02-23T18:35:53.968Z,
  birthtime:2020-02-21T17:39:36.282Z
}

參考： https://nodejs.org/api/fs.html#fs_fs_statsync_path_options