https://blog.csdn.net/zhishiqu/article/details/79800570

npm install -g iconv-lite

准备一个文本文件（当然也可以是csv文件等）test.txt和text.csv，nodejs文件test.js如下：

var iconv = require('iconv-lite');
var fs = require('fs');
var fileStr = fs.readFileSync('D:\\test.csv', {encoding:'binary'});
var buf = new Buffer(fileStr, 'binary');
var str = iconv.decode(buf, 'GBK');
console.log(str);

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