Node.js fs。Dir.closeSync()方法
原文:https://www . geesforgeks . org/node-js-fs-dir-close sync-method/
fs。Dir.closeSync() 方法是类 fs 的内置应用编程接口。文件系统模块中的目录，用于同步关闭目录的底层资源句柄。
语法:
const dir.closeSync()
参数:此方法不接受任何参数。 返回值:这个方法返回一个未定义的对象
下面的程序说明了 fs 的使用。Dir.closeSync() 方法。
例 1:
文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// dir.closeSync() method
const fs = require('fs');
// Initiating async function
async function stop(path) {
// Creating and initiating directory's
// underlying resource handle
const dir = await fs.promises.opendir(path);
console.log("All the dirent before operation :- ");
for (var i = 0; i <= 6; i++) {
console.log(((dir.readSync())).name);
}
// Synchronously closeSyncing the directory's
// underlying resource handle
const promise = dir.closeSync();
// Display the result
console.log("dir is closed successfully");
}
// Catching error
stop('./').catch(console.error);
使用以下命令运行 index.js 文件:
node index.js
输出:
All the dirent before operation :-
abcd.cer
books.txt
cert.cer
certfile.cer
certificate1.cer
example.txt
features
dir is closed successfully
例 2:
文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// dir.closeSync() method
const fs = require('fs');
const fsPromises = fs.promises;
// Name of the directory to be created
let directo = './temp';
// Checking if the directory is present or not
if (!fs.existsSync(directo)){
fs.mkdirSync(directo);
}
// Initiating asynchronous function
async function funct(path) {
// Initializing dir
let dir = null;
let pathval = null;
try {
// Creating and initiating directory's
// underlying resource handle
dir = await fs.promises.opendir(
new URL('file:///F:/java/temp'));
console.log("All the dirent before operation :- "
+ ((dir.readSync())));
// Getting the path of the directory
// by using path() method
pathval = dir.path;
} finally {
if (dir) {
// Close the file if it is opened.
console.log("Path :- " + pathval);
console.log("All the dirent before operation :- "
+ ((dir.readSync())));
console.log("dir is closed successfully");
await dir.closeSync();
}
}
}
funct('./').catch(console.error);
使用以下命令运行 index.js 文件:
node index.js
输出:
All the dirent before operation :- [object Object]
Path :- F:
All the dirent before operation :- [object Object]
dir is closed successfully
参考:T2【https://nodejs . org/dist/latest-v 12 . x/docs/API/fs . html # fs _ dir _ close sync
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