摘要：進(jìn)制轉(zhuǎn)換在線工具獲取的高位和低位獲取高四位獲取低四位高位和低位合并字節(jié)高位空格低位例如二進(jìn)制轉(zhuǎn)換成進(jìn)制二進(jìn)制轉(zhuǎn)換十六進(jìn)制十六進(jìn)制字符串轉(zhuǎn)字節(jié)數(shù)組十六進(jìn)制字符串轉(zhuǎn)字節(jié)數(shù)組每個字符串轉(zhuǎn)換轉(zhuǎn)為符合進(jìn)制字符串字節(jié)數(shù)組轉(zhuǎn)十六進(jìn)制字符串字節(jié)數(shù)組轉(zhuǎn)

獲取byte的高4位bit和低4位bit

function getHeight4(ata){//獲取高四位
    int height;
    height = ((data & 0xf0) >> 4);
    return height;
}

function getLow4(data){//獲取低四位
    int low;
    low = (data & 0x0f);
    return low;
}

高4位和低4位合并

1字節(jié) = 高4位（空格）低4位
例如：00001001 = 0000 1001

二進(jìn)制轉(zhuǎn)換成16進(jìn)制
1001（二進(jìn)制） 轉(zhuǎn)換 0x09（十六進(jìn)制）

十六進(jìn)制字符串轉(zhuǎn)字節(jié)數(shù)組

/**
   * 十六進(jìn)制字符串轉(zhuǎn)字節(jié)數(shù)組
   * 每2個字符串轉(zhuǎn)換
   * 903132333435363738 轉(zhuǎn)為 [-112, 49, 50, 51, 52, 53, 54, 55, 56]
   * @param {String} str 符合16進(jìn)制字符串
   */
  Str2Bytes(str) {
    var pos = 0;
    var len = str.length;
    if (len % 2 != 0) {
      return null;
    }
    len /= 2;
    var hexA = new Array();
    for (var i = 0; i < len; i++) {
      var s = str.substr(pos, 2);
      var v = parseInt(s, 16);
      if(v >=127) v = v-255-1
      hexA.push(v);
      pos += 2;
    }
    return hexA;
  },

字節(jié)數(shù)組轉(zhuǎn)十六進(jìn)制字符串

/**
   * 字節(jié)數(shù)組轉(zhuǎn)十六進(jìn)制字符串
   * [-112, 49, 50, 51, 52, 53, 54, 55, 56] 轉(zhuǎn)換 903132333435363738
   * @param {Array} arr 符合16進(jìn)制數(shù)組
   */
  Bytes2Str(arr) {
    var str = "";
    for (var i = 0; i < arr.length; i++) {
      var tmp;
      var num=arr[i];
  ????if (num < 0) {
  ????//此處填坑，當(dāng)byte因為符合位導(dǎo)致數(shù)值為負(fù)時候，需要對數(shù)據(jù)進(jìn)行處理
  ??????tmp =(255+num+1).toString(16);
  ????} else {
  ??????tmp = num.toString(16);
  ????}
      if (tmp.length == 1) {
        tmp = "0" + tmp;
      }
      str += tmp;
    }
    return str;
  },

十六進(jìn)制字符串轉(zhuǎn)數(shù)組

 /**
   * 十六進(jìn)制字符串轉(zhuǎn)數(shù)組
   * 1185759ac35a91143f97037002b1a266 轉(zhuǎn)換 ["11", "85", "75", "9a", "c3", "5a", "91", "14", "3f", "97", "03", "70", "02", "b1", "a2", "66"]
   * @param {String} str 十六進(jìn)制字符串
   */
  Str2Arr(str) {
    var pos = 0;
    var len = str.length;
    if (len % 2 != 0) {
      return null;
    }
    len /= 2;
    var hexA = new Array();
    for (var i = 0; i < len; i++) {
      var s = str.substr(pos, 2);
      hexA.push(s);
      pos += 2;
    }
    return hexA;
  },

十六進(jìn)制數(shù)組進(jìn)行異或

/**
   * 十六進(jìn)制數(shù)組進(jìn)行異或
   * @param {Array} arr 十六進(jìn)制數(shù)組
   */
  BytesDes(arr) {
    var des = 0
    for (var i = 0; i < arr.length; i++) {
      des ^= parseInt(arr[i], 16)
    }
    return des.toString(16).toUpperCase();
  },

十進(jìn)制轉(zhuǎn)十六進(jìn)制

/**
   * 十進(jìn)制轉(zhuǎn)十六進(jìn)制
   * 15 轉(zhuǎn) 0F
   * @param {Number} num 十進(jìn)制數(shù)字
   */
  toHex(num) {
    return ("0" + (Number(num).toString(16))).slice(-2).toUpperCase()
  }

二進(jìn)制轉(zhuǎn)十六進(jìn)制

/**
   * 二進(jìn)制轉(zhuǎn)十六進(jìn)制
   * 00001001 轉(zhuǎn) 09
   * @param {String} str 二進(jìn)制字符串
   */
  binTohex(str) {
    let hex_array = [{ key: 0, val: "0000" }, { key: 1, val: "0001" }, { key: 2, val: "0010" }, { key: 3, val: "0011" }, { key: 4, val: "0100" }, { key: 5, val: "0101" }, { key: 6, val: "0110" }, { key: 7, val: "0111" },
    { key: 8, val: "1000" }, { key: 9, val: "1001" }, { key: "a", val: "1010" }, { key: "b", val: "1011" }, { key: "c", val: "1100" }, { key: "d", val: "1101" }, { key: "e", val: "1110" }, { key: "f", val: "1111" }]
    let value = ""
    let list = []
    if (str.length % 4 !== 0) {
      let a = "0000"
      let b = a.substring(0, 4 - str.length % 4)
      str = b.concat(str)
    }
    while (str.length > 4) {
      list.push(str.substring(0, 4))
      str = str.substring(4);
    }
    list.push(str)
    for (let i = 0; i < list.length; i++) {
      for (let j = 0; j < hex_array.length; j++) {
        if (list[i] == hex_array[j].val) {
          value = value.concat(hex_array[j].key)
          break
        }
      }
    }
    return value
  }

十六進(jìn)制數(shù)字和ASCII字符之間轉(zhuǎn)換

var hex="0x10";//十六進(jìn)制  
var charValue = String.fromCharCode(hex);//生成Unicode字符  
var charCode = charValue.charCodeAt(0);//獲取指定字符的十進(jìn)制表示.  
var hexOri="0x"+charCode.toString(16);;//將int值轉(zhuǎn)換為十六進(jìn)制  

hex:0x10
charValue:+
charCode:16
hexOri:0x10

十六進(jìn)制數(shù)組轉(zhuǎn)ASCLL編碼

/**
   * 十六進(jìn)制字符串轉(zhuǎn)ASCLL編碼
   * 3132333435363738 轉(zhuǎn)換 12345678
   * @param {String} str 十六進(jìn)制字符串
   */
  HexToAscll(str) {
    var pos = 0;
    var len = str.length/2;
    var hexA = "";
    for (var i = 0; i < len; i++) {
      var s = str.substr(pos, 2);
      hexA += String.fromCharCode(`0x${s}`);
      pos += 2;
    }
    return hexA;
  },