js 改变字符编码

const str = "你好";
const encoder = new TextEncoder();
const utf8Bytes = encoder.encode(str); // 默认编码为UTF-8
console.log(utf8Bytes);

const utf8Bytes = new Uint8Array([228, 189, 160, 229, 165, 189]); // "你好"的UTF-8编码
const decoder = new TextDecoder('utf-8');
const str = decoder.decode(utf8Bytes);
console.log(str); // 输出: 你好

const iconv = require('iconv-lite');

// 将GBK编码的字符串转换为UTF-8
const gbkStr = "\xB2\xE2\xCA\xD4"; // "你好"的GBK编码
const utf8Str = iconv.decode(Buffer.from(gbkStr, 'binary'), 'gbk');
console.log(utf8Str); // 输出: 你好

// 将UTF-8编码的字符串转换为GBK
const utf8Str2 = "你好";
const gbkBuffer = iconv.encode(utf8Str2, 'gbk');
const gbkStr2 = gbkBuffer.toString('binary');
console.log(gbkStr2); // 输出: 你好的GBK编码