如何在javascript中将整数数组转换为十六进制字符串,反之亦然

时间:2011-10-06 04:40:36

标签: javascript arrays string tostring parseint

我在javascript中有32位整数数组。 如何将其转换为十六进制字符串 并在需要时再次从该Hex字符串构建相同的32位整数数组?

hexString = yourNumber.toString(16); 可用于将数字转换为十六进制 但是当数组数组转换为十六进制字符串(它将是连续的或由某个字符分隔)时,如何从该字符串中获取数字数组?

7 个答案:

答案 0 :(得分:6)

如果你想不用逗号

[3546,-24,99999,3322] ==> "00000ddaffffffe80001869f00000cfa"

然后您可以使用每个数字的8个十六进制数字来构建字符串。当然,您必须填充短于8个十六进制数字的数字。并且您必须确保使用twos-compliment对数字进行编码,以正确处理任何负值。

以下是如何做到这一点:

var a = [3546,-24,99999,3322];
alert("Original is " + JSON.stringify(a));    // [3546,-24,99999,3322]


// convert to hex string...
//
var b = a.map(function (x) {
    x = x + 0xFFFFFFFF + 1;  // twos complement
    x = x.toString(16); // to hex
    x = ("00000000"+x).substr(-8); // zero-pad to 8-digits
    return x
}).join('');
alert("Hex string " + b);   // 00000ddaffffffe80001869f00000cfa


// convert from hex string back to array of ints
//
c = [];
while( b.length ) {
    var x = b.substr(0,8);
    x = parseInt(x,16);  // hex string to int
    x = (x + 0xFFFFFFFF + 1) & 0xFFFFFFFF;   // twos complement
    c.push(x);
    b = b.substr(8);
}
alert("Converted back: " + JSON.stringify(c));    // [3546,-24,99999,3322]

here's a jsFiddle显示了上述示例。

答案 1 :(得分:4)

你走了:

var a = [3546,-24,99999,3322];
alert("Original is " + JSON.stringify(a));
var b = (a.map(function (x) {return x.toString(16);})).toString();
alert("Hex string " + b);
var c = b.split(",").map(function (x) {return parseInt(x, 16);});
alert("Converted back: " + JSON.stringify(c));

http://jsfiddle.net/whT2m/

<强>附录

OP询问使用除逗号以外的分隔符。只需要进行一些小调整。这是使用分号的版本:

var a = [3546,-24,99999,3322];
alert("Original is " + JSON.stringify(a));
var b = (a.map(function (x) {return x.toString(16);})).join(";");
alert("Hex string " + b);
var c = b.split(";").map(function (x) {return parseInt(x, 16);});
alert("Converted back: " + JSON.stringify(c));

http://jsfiddle.net/DEbUs/

答案 2 :(得分:3)

var ints = [1,2,30,400];
var hexstr = "";
for(var i=0; i < ints.length; i++) {
    hexstr += ints[i].toString(16) + ";";
}

document.write("Hex: " + hexstr + "<br>");
var intsback = new Array();
var hexarr = hexstr.split(";");
for(var i = 0; i < hexarr.length-1; i++) {
    intsback.push(parseInt(hexarr[i], 16));
}

document.write("Integers back: " + intsback);

http://jsfiddle.net/YVdqY/

答案 3 :(得分:1)

以下是使用普通javascript进行转换的两个函数,这些函数应该适用于所有浏览器:

var nums = [3456, 349202, 0, 15, -4567];

function convertNumArrayToHexString(list) {
    var result = [];
    for (var i = 0; i < list.length; i++) {
        result.push(list[i].toString(16));
    }
    return(result.join(","));
}

function convertHexStringToNumArray(str) {
    var result = [];
    var list = str.split(/\s*,\s*/);
    for (var i = 0; i < list.length; i++) {
        result.push(parseInt(list[i], 16));
    }
    return(result);
}


var temp = convertNumArrayToHexString(nums);
temp = convertHexStringToNumArray(temp);

并且,一个有效的演示:http://jsfiddle.net/jfriend00/3vmNs/

答案 4 :(得分:1)

十六进制字符串到整数数组(例如,0E0006006200980000000000000000)

dataToNumberArr(data) {
        if(data.length == 2) {
            let val = parseInt(data, 16);
            return [val];
        } else if(data.length > 2) {
            return dataToNumberArr(data.substr(0, 2)).concat(dataToNumberArr(data.substr(2)));
        }
    }

答案 5 :(得分:0)

使用此:

parseInt(hexstr, 16);

来源:http://javascript.about.com/library/blh2d.htm

答案 6 :(得分:0)

您可以调用parseInt(hexString,16)将十六进制字符串转换为整数值。