ES6 JS 关于字符串和数组之间的转换

男娘i 2022-05-21 03:09 336阅读 0赞

# ES6 JS 关于字符串和数组之间的转换 #

// ArrayBuffer转16进度字符串示例
    function ab2hex(buffer) { 
      var hexArr = Array.prototype.map.call(
        new Uint8Array(buffer),
        function(bit) { 
          return ('00' + bit.toString(16)).slice(-2)
        }
      )
      return hexArr.join('');
    }
    
    // 16进制字符串转ArrayBuffer
    function hex2ab(value) { 
      var typedArray = new Uint8Array(value.match(/[\da-f]{
       2}/gi).map(function(h) { 
        return parseInt(h, 16)
      }))
      var buffer = typedArray.buffer;
      var bufLen = buffer.byteLength;
      if (Math.floor(bufLen % 20) != 0) {
        var fillBuffer = new Uint8Array(Math.ceil(bufLen / 20) * 20);
        fillBuffer.set(typedArray);
        buffer = fillBuffer.buffer;
      }
      return buffer;
    }
    
    /** * 字符串转16进制(只支持16进制的字符串) */
    function strToHexCharCode(str) { 　　
      if (str === "") return "";　　
      var hexCharCode = [];
      for (var i = 0; i < str.length; i++) {
        hexCharCode.push((str.charCodeAt(i)).toString(16));　　
      }
      return hexCharCode.join("");
    }
    
    // 异或
    function XOR(b, len) { 
      var tmp = b[0];
      for (var i = 1; i < len; i++) {
        tmp ^= b[i];
      }
      return tmp;
    }
    
    // byte[]转整形
    function bytesToLong(bytValue) { 
      var ret = 0;
      for (var i = 0; i < bytValue.length; i++) {
        ret += (bytValue[bytValue.length - i - 1] & 0xFF) << (i * 8);
      }
      return ret;
    }
    
    /** * 十六进制转字符串 */
    function hexCharCodeToStr(hexCharCodeStr) { 　　
      var trimedStr = hexCharCodeStr.trim();　　
      var rawStr = 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("");
    }
    
    #//================================js=============================
    
    
    
     var str = "ABCD,;'/,][;'85*&%$#@!}{\nABCD,;'/,][;'';/.,<{]~`!85*&%$#@!}{\n";
    
        let intArray = strToIntArray(str);
        let toStr = byteArrayToStr(intArray);
        console.log("toStr==数组转字符串====" + toStr)
        let toHex = byteArrayToHex(intArray);
        console.log("===数组转十六进制字符串======" + toHex)
        let toByte = hexStrToByte(toHex);
        let toStrOld = byteArrayToStr(toByte);
        console.log("toStr==数组转字符串==toStrOld==" + toStrOld)
    
        /** *byte[] 数组转十六进制字符串 * @param strValue byte[] 数组 * @returns {string} */
        function byteArrayToHex(arrayValue) { 
            var hexStr = "";
            for (var arrayItem of arrayValue) {
                var charHex = arrayItem.toString(16);
                charHex = (Math.floor(charHex.length % 2) == 0) ? charHex : `0${charHex}`;
                hexStr = `${hexStr}${charHex}`;
            }
            return hexStr.toLocaleUpperCase();
        }
    
        /** * 十六进制字符串转byte[] * @param hexStrValue 十六进制字符串 * */
        function hexStrToByte(hexStrValue) { 
            var hexValueLen = hexStrValue.length;
            var arrayCode = [];
            if (Math.floor(hexValueLen%2)!=0){
                hexStrValue = `${hexStrValue}0`;
            }
            for (var i=0;i<hexValueLen;i+=2){
                var itemValue = hexStrValue.substring(i,i+2);
                arrayCode.push(parseInt(itemValue,16))
            }
            return arrayCode;
        }
    
    
        /** * byte[] 转字符串 * @param byteArrayValue 数组 * @returns {string} */
        function byteArrayToStr(byteArrayValue) { 
            var str = "";
            for (var arrayItem of byteArrayValue) {
                str = `${str}${String.fromCharCode(arrayItem)}`;
            }
            return str;
        }
    
        /** * 字符串转byte[] * @param strValue ASCII字符串 * @returns {Array}数组 */
        function strToIntArray(strValue) { 
            var intAray = [];
            var valueLen = strValue.length;
            for (var i = 0; i < valueLen; i++) {
                intAray.push(strValue.charCodeAt(i));
            }
            return intAray;
        }
    
    //结果
    toStr==数组转字符串====ABCD,;'/,][;'85*&%$#@!}{ 
    ABCD,;'/,][;'';/.,<{]~`!85*&%$#@!}{ Conversion.html?_ijt=ol6i0r2lhnq35vp2tllh27lcug:19 ===数组转十六进制字符串======414243442C3B272F2C5D5B3B2738352A2625242340217D7B0A414243442C3B272F2C5D5B3B27273B2F2E2C3C7B5D7E602138352A2625242340217D7B0A Conversion.html?_ijt=ol6i0r2lhnq35vp2tllh27lcug:22 toStr==数组转字符串==toStrOld==ABCD,;'/,][;'85*&%$#@!}{ ABCD,;'/,][;'';/.,<{]~`!85*&%$#@!}{