📌  相关文章
📜  Node.js StringDecoder

📅  最后修改于: 2020-12-24 03:45:40             🧑  作者: Mango

Node.js StringDecoder

Node.js StringDecoder用于将缓冲区解码为字符串。它类似于buffer.toString()，但为UTF提供了额外的支持。

您需要使用require('string_decoder')来使用StringDecoder模块。

const StringDecoder = require('string_decoder').StringDecoder;

Node.js StringDecoder方法

StringDecoder类只有两个方法。

Method Description
decoder.write(buffer) It is used to return the decoded string.
decoder.end() It is used to return trailing bytes, if any left in the buffer.

Node.js StringDecoder示例

我们来看一个简单的Node.js StringDecoder示例。

文件：stringdecoder_example1.js

const StringDecoder = require('string_decoder').StringDecoder;
const decoder = new StringDecoder('utf8');

const buf1 = new Buffer('this is a test');
console.log(decoder.write(buf1));//prints: this is a test

const buf2 = new Buffer('7468697320697320612074c3a97374', 'hex');
console.log(decoder.write(buf2));//prints: this is a test

const buf3 = Buffer.from([0x62,0x75,0x66,0x66,0x65,0x72]);
console.log(decoder.write(buf3));//prints: buffer