Node.js fs.rename()方法
fs.rename()方法用于将给定旧路径的文件异步重命名为给定新路径。如果目标文件已经存在，它将覆盖该文件。
语法:
fs.rename( oldPath, newPath, callback )
参数:该方法接受三个参数，如上所述，如下所述:
- [Old path]: Save the file path to be renamed. It can be a string, a buffer or a web address.
- New Path: A new path that needs to be renamed to save the file. It can be a string, a buffer or a web address.
- Callback: is a function that will be called when the method is executed. It has an optional parameter to display any errors that occur during the process.
下面的例子说明了 Node.js 中的 fs.rename()方法:
示例 1: 本示例使用 fs.rename()方法重命名文件。
// Node.js program to demonstrate the
// fs.rename() method
// Import filesystem module
const fs = require('fs');
// List all the filenames before renaming
getCurrentFilenames();
// Rename the file
fs.rename('hello.txt', 'world.txt', () => {
console.log("\nFile Renamed!\n");
// List all the filenames after renaming
getCurrentFilenames();
});
// Function to get current filenames
// in directory
function getCurrentFilenames() {
console.log("Current filenames:");
fs.readdirSync(__dirname).forEach(file => {
console.log(file);
});
}
输出:
Current filenames:
hello.txt
index.js
File Renamed!
Current filenames:
index.js
world.txt
示例 2: 本示例使用 fs.rename()方法演示文件重命名过程中的一个错误。
// Node.js program to demonstrate the
// fs.rename() method
// Import filesystem module
const fs = require('fs');
// List all the filenames before renaming
getCurrentFilenames();
// Rename the file
fs.rename('hello.txt', 'geeks.txt', (error) => {
if (error) {
// Show the error
console.log(error);
}
else {
// List all the filenames after renaming
console.log("\nFile Renamed\n");
// List all the filenames after renaming
getCurrentFilenames();
}
});
// Function to get current filenames
// in directory
function getCurrentFilenames() {
console.log("Current filenames:");
fs.readdirSync(__dirname).forEach(file => {
console.log(file);
});
}
输出:
Current filenames:
index.js
package.json
world.txt
[Error: ENOENT: no such file or directory, rename
'G:\tutorials\nodejs-fs-rename\hello.txt' ->
'G:\tutorials\nodejs-fs-rename\geeks.txt'] {
errno: -4058,
code: 'ENOENT',
syscall: 'rename',
path: 'G:\\tutorials\\nodejs-fs-rename\\hello.txt',
dest: 'G:\\tutorials\\nodejs-fs-rename\\geeks.txt'
}
参考:T2【https://nodejs . org/API/fs . html # fs _ fs _ rename _ old path _ new path _ callback
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