js-10进制-2进制-16进制数据间的相互转化
最近蓝牙前端开发，涉及了大量的数据格式转化，在此记录下。 ```javascript (type) export default class BleUtil { // 十进制转16进制 static intToHex(int) { let hex = int.toString(16); if (int < 16) { return 0x00 + hex; } else { return hex; } } // 十六进制转int static hexToInt(string) { return parseInt(string, 16); }
// 字符串转二进制数据 static getBytes(string) { let array = new Uint8Array(string.length); for (var i = 0, l = string.length; i < l; i++) { array[i] = string.charCodeAt(i); } return array; } // 接收后封装 static bytesToString(buffer) { return String.fromCharCode.apply(null, new Uint8Array(buffer)); } // buffer转16进制 static bytesToHex(buffer) { let str = this.bytesToString(buffer); let hexStr = ‘’; for (let i = 0; i < str.length; i++) { hexStr += BleUtil.intToHex(str.charCodeAt(i)); } return hexStr; } // 字符串转16进制 static string2Hex(str) { return BleUtil.intToHex(parseInt(str)); } // 字符串为空 static isBlank(str) { if (typeof str == undefined || str == null) { return true; } else { return str.length == 0; } } // 16进制转字符串 static hexCharCodeToStr(hexCharCodeStr) { var trimedStr = hexCharCodeStr.trim(); var rawStr = trimedStr.substr(0,2).toLowerCase() === “0x” ? trimedStr.substr(2) : trimedStr; var len = rawStr.length; if(len % 2 !== 0) { console.log(“Illegal Format ASCII Code!”); return “”; } var curCharCode; var resultStr = []; for(var i = 0; i < len;i = i + 2) { curCharCode = parseInt(rawStr.substr(i, 2), 16); // ASCII Code Value resultStr.push(String.fromCharCode(curCharCode)); } return resultStr.join(“”); } // 16进制转buffer static hexToBUffer(hex) { const typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) { return parseInt(h, 16) })); return typedArray; } // 16进制取反 static hexReverse(hex) { let buffer = new Uint8Array(hex.match(/[\da-f]{2}/gi)); let revList = ‘’; buffer.map((item, index) => { buffer[index] = ~item; revList += buffer[index].toString(16); }); return revList; } // 16进制转二进制字符串 static hexToTwoString(hexString) { let inte = parseInt(hexString, 16); let bytesString = (inte).toString(2); let length = 8 - bytesString.length; if (bytesString.length < 8) { for (let i = 0; i < length; i++) { bytesString = ‘0’ + bytesString; } } return bytesString; } } ```
