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// hex转json字符串,16进制ASCII
var hextoString = function (hex) {
var arr = hex.split("")
var out = ""
for (var i = 0; i < arr.length / 2; i++) {
var tmp = "0x" + arr[i * 2] + arr[i * 2 + 1]
var charValue = String.fromCharCode(tmp);
out += charValue
}
return out
};
// json字符串转hex
var stringtoHex = function (str) {
var val = "";
for (var i = 0; i < str.length; i++) {
if (val == "")
val = str.charCodeAt(i).toString(16);
else
val += str.charCodeAt(i).toString(16);
}
val += "0a"
return val
}
使用上述方法，字符串和hex可以相互转换，直接将要转换的当做参数传进去，打印下就有值了。 使用例子：
// hextoString demo
let str1 = '303132334041';
console.log(hextoString(str1)); //0123@A
//stringtoHex demo
let str4 = '0123@A';
console.log(stringtoHex(str4)); //3031323340410a
参考： https://www.runoob.com/jsref/jsref-obj-string.html
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