node. JS Read and write Chinese content file operations

Because node. JS supports only the following encodings: UTF8, UCS2, ASCII, binary, base64, Hex, do not support encodings such as Chinese GBK or GB2312,

Therefore, if you want to read and write Chinese content, you must use additional modules: Iconv-lite

Note: node's Iconv module, only support Linux, does not support windows, so to use pure JS Iconv-lite, another: the author said Iconv-lite performance is better, specific reference git site: iconv-lite

Note 2: I am in the test read and write files, always can not write the Chinese file, has been garbled, read normal, later colleagues help me to find: JS file encoding format is ANSI,nodejs code file must be UTF8 format

1. Installation module: NPM Install Iconv-lite

2. Demo code, copy the following code into a file, assuming it is ch.js (Note: JS file must be saved in UTF8 encoding format):

Load the file system read-write module var fs = require (' FS ');//Load Code conversion module var iconv = require (' Iconv-lite '); var file = "C:\\a.txt", WriteFile (file), ReadFile (file), function WriteFile (file) {    //test in Chinese    var str = "\r\ n I am a man hello myself! ";    Convert Chinese to byte array    var arr = iconv.encode (str, ' GBK ');    Console.log (arr);        AppendFile, if the file does not exist, will automatically create a new file    //If using WriteFile, then delete the old file, write the new file directly    fs.appendfile (file, arr, function (err) {        if (err)            console.log ("fail" + err);        else            console.log ("Write file OK");    }); function ReadFile (file) {    fs.readfile (file, function (err, data) {        if (err)            console.log ("Read file fail" + Err );        else{            //Read success            //output byte array            console.log (data);            Convert the array to GBK            var str = iconv.decode (data, ' GBK ');            Console.log (str);        }    );}

3, with Node.exe implementation of this JS file, the results are as follows:

C:\>node ch.js<buffer 0d 0a CE d2 CA C7 D2 BB b8 f6 C8 CB 6c 6c 6f 6d All in 6c 21> write file Ok<buffer 0d 0a CE d2 CA C7 D2 BB b8 f6 C8 CB 6c 6c 6f 6d All-in-one 6c 21> I am a person Hello myself! C:\>