fs.writeFileSync()方法用于将数据同步写入文件。如果该文件已经存在，则替换该文件。 “ options”参数可用于修改方法的函数。
用法:
fs.writeFileSync( file, data, options )
参数：此方法接受上述和以下所述的三个参数：
- file:它是一个字符串，Buffer，URL或文件描述整数，表示必须在其中写入文件的路径。使用文件描述符将使其行为类似于fs.write()方法。
- data:它是将写入文件的字符串，Buffer，TypedArray或DataView。
- options:它是一个字符串或对象，可用于指定将影响输出的可选参数。它具有三个可选参数：
- encoding:它是一个字符串，它指定文件的编码。默认值为“ utf8”。
- mode:它是一个整数，指定文件模式。默认值为0o666。
- flag:它是一个字符串，指定在写入文件时使用的标志。默认值为“ w”。
以下示例说明了Node.js中的fs.writeFileSync()方法：
范例1：
// Node.js program to demonstrate the
// fs.writeFileSync() method
// Import the filesystem module
const fs = require('fs');
let data = "This is a file containing a collection"
+ " of programming languages.\n"
+ "1. C\n2. C++\n3. Python";
fs.writeFileSync("programming.txt", data);
console.log("File written successfully\n");
console.log("The written has the following contents:");
console.log(fs.readFileSync("programming.txt", "utf8"));输出：
File written successfully The written has the following contents: This is a file containing a collection of programming languages. 1. C 2. C++ 3. Python
范例2：
// Node.js program to demonstrate the
// fs.writeFileSync() method
// Import the filesystem module
const fs = require('fs');
// Writing to the file 5 times
// with the append file mode
for (let i = 0; i < 5; i++) {
fs.writeFileSync("movies.txt",
"Movie " + i + "\n",
{
encoding:"utf8",
flag:"a+",
mode:0o666
});
}
console.log("File written successfully 5 times\n");
console.log("The written file has the following contents:");
console.log(fs.readFileSync("movies.txt", "utf8"));输出：
File written successfully 5 times The written file has the following contents: Movie 0 Movie 1 Movie 2 Movie 3 Movie 4
参考： https://nodejs.org/api/fs.html#fs_fs_writefilesync_file_data_options
注：本文由纯净天空筛选整理自 Node.js | fs.writeFileSync() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。