Node.js文件编码格式的转换的方法

var fs = require('fs');var chardet = require('chardet');var jschardet = require("jschardet");var encoding = require("encoding");var path = "lua目录";function readDirectory(dirPath) {  if (fs.existsSync(dirPath)) {    var files = fs.readdirSync(dirPath);    files.forEach(function (file) {      var filePath = dirPath + "/" + file;      var stats = fs.statSync(filePath);      if (stats.isDirectory()) {        // console.log('/n读取目录：/n', filePath, "/n");        readDirectory(filePath);      } else if (stats.isFile() && //.lua$/.test(filePath)) {        var buff = fs.readFileSync(filePath);        if (buff.length && buff[0].toString(16).toLowerCase() == "ef" && buff[1].toString(16).toLowerCase() == "bb" && buff[2].toString(16).toLowerCase() == "bf") {          //EF BB BF 239 187 191          console.log('/n发现BOM文件：', filePath, "/n");          buff = buff.slice(3);          fs.writeFile(filePath, buff.toString(), "utf8");        }        // { encoding: 'UTF-8', confidence: 0.99 }        // var charset = chardet.detectFileSync(filePath);        var info = jschardet.detect(buff);        if (info.encoding == "GB2312" || info.encoding == "ascii") {          var resultBuffer = encoding.convert(buff, "UTF-8", info.encoding);          fs.writeFile(filePath, resultBuffer, "utf8");        }        else if (info.encoding != "UTF-8" && chardet.detectFileSync(filePath) != "UTF-8")        {          if (buff.toString().indexOf("/r/n") > -1)          {            var resultBuffer = encoding.convert(buff, "UTF-8", "GBK");            fs.writeFile(filePath, resultBuffer, "utf8");          }        }      }    });  } else {    console.log('Not Found Path : ', dirPath);  }}readDirectory(path);