js如何实现arraybuffer与十六进制相互转换?
网友回复
1、arraybuffer类型转16进制字符串
function buf2hex(buffer) { return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join(''); }2、16进制字符串 转 ArrayBuffer
function hex2buf(hex){ var typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) { return parseInt(h, 16) })) return typedArray.buffer }完整示例代码
function hex2buf(hex) { var typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) { return parseInt(h, 16) })) return typedArray.buffer } function buf2hex(buffer) { return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join(''); } var hex = 'aa5504b10000b5'; let buf = hex2buf(hex); console.log(buf); let oldhex = buf2hex(buf); console.log(oldhex);
附加知识:
一、普通字符转二进制:
var code = "a" var rs = code.charCodeAt() //获得"a"在ASCII表中对应的十进制整数, console.log(rs)//97 二、二进制转十六进制 var code = 97 var rs1 = code.toString(16) //获得97对应的十六进制整数 console.log(rs1)//61 补充:普通字符转十六进制连写consle.log("a".charCodeAt().toString(16)) 三、十六进制转二进制 var num = 61 var val = parseInt(num,16)//第二参数告诉函数,num是16进制整数,parseInt会帮我们解析成对应的十进制整数 console.log(val) //97 四、二进制转普通字符 var num = 97 var val1 = String.fromCharCode(num)//获得十进制整数97在ASCII表中对应的字符 console.log(val1)//a