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How to deal with Chinese garbled code in nodejs json

藏色散人
藏色散人Original
2021-11-19 13:57:382641browse

nodejs json中文乱码的解决办法:1、检查json文件是不是UTF-8无BOM编码;2、以UTF8编码格式保存文件;3、用二进制编码方式读取,再用GBK解码即可。

How to deal with Chinese garbled code in nodejs json

本文操作环境:windows7系统、nodejs10.16.2版本、Dell G3电脑。

nodejs json中文乱码怎么办?

nodejs读取本地中文json文件出现乱码解决方法

1. 确定json文件是UTF-8 无BOM编码的的。如果有BOM,会在读取第一行的时候出现乱码。

Per "fs.readFileSync(filename, 'utf8') doesn't strip BOM markers #1918", fs.readFile is
working as designed: BOM is not stripped from the header of the UTF-8 file, if it exists. It at the discretion of the developer to handle this.
Possible workarounds:
data= data.replace(/^\uFEFF/, ''); perhttps://github.com/joyent/node/issues/1918#issuecomment-2480359
Transform the incoming stream to remove the BOM header with the NPM module bomstrip perhttps://github.com/joyent/node/issues/1918#issuecomment-38491548
What you are getting is the byte order mark header (BOM) of the UTF-8 file. When JSON.parse sees
this, it gives an syntax error (read: "unexpected character" error). You must strip the byte order mark from the file before passing it to JSON.parse:
fs.readFile('./myconfig.json', 'utf8', function (err, data) {
  myconfig = JSON.parse(data.toString('utf8').replace(/^\uFEFF/, ''));
});
// note: data is an instance of Buffer

2. 确定json没有格式错误。我在用utf8编码并用utf8 encoding来读取文件之后依然报错,百思不得其解。

最后发现json有两个editor没有发现的格式错误,一个是一个数组中两个元素之间少了一个“,”,另一个是另一个数组最后多了一个“,”。

 

注1:Node的iconv模块,仅支持linux,不支持Windows,因此要用纯js的iconv-lite,另:作者说iconv-lite的性能更好,具体参考Git站点:iconv-lite

注2:我在测试读写文件时,始终无法把中文写入文件,一直乱码,读取正常,后来同事帮我发现:js文件的编码格式是ansi,nodejs的代码文件必须是utf8格式

注3:如果程序操作的文件,都是以UTF8编码格式保存的,那么就不需要使用iconv模块,直接以utf8格式读取文件即可,如:

// 参数file,必须保存为utf8格式,否则里面的中文会乱码  
function readFile(file){  
    // readFile的第2个参数表示读取编码格式,如果未传递这个参数,表示返回Buffer字节数组  
    fs.readFile(file, "utf8", function(err, data){  
        if(err)  
            console.log("读取文件fail " + err);  
        else{  
            // 读取成功时  
            console.log(data);// 直接输出中文字符串了  
        }  
    });  
}

nodejs读取中文文件编码问题

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);

直接读文件的话是乱码,不信你可以试试。需要先统一用二进制编码方式读取,然后再用GBK解码。

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