js 生成条形码

ゝ一纸荒年。 2023-09-26 17:41 11阅读 0赞

**简介：**

通过js生成条形码

**效果展示：**

![d43c53013f754d3bb33095c774dd9bd7.png][]

**示例代码：**

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>JS生成二维码</title>
        <script src="js/barcode.js"></script>
        <script src="js/jQuery.js"></script>
        <style>
            .barcode { margin-top: 20px; text-align: center}
            .barcode + * { clear:both}
            #barcode { white-space: nowrap; zoom: .5;/* -webkit-transform: scaleX( .5); transform: scaleX(.5);*/}
            #barcode div { display: inline-block; height: 120px}
            .barcode .bar1 { border-left:2px solid black}
            .barcode .bar2 { border-left:4px solid black}
            .barcode .bar3 { border-left:6px solid black}
            .barcode .bar4 { border-left:8px solid black}
            .barcode .space0 { margin-right:0}
            .barcode .space1 { margin-right:2px}
            .barcode .space2 { margin-right:4px}
            .barcode .space3 { margin-right:6px}
            .barcode .space4 { margin-right:8px}
            .barcode label { clear:both; display:block; text-align:center; font: 16px/34px helvetica}
        </style>
    </head>
    <body>
    <div class="barcode code-box">
        <div id="barcode"></div>
    </div>
    <script>
        $(function () {
            // showDiv：代表需要显示的divID，
            // textVlaue ： 代表需要生成的值，
            // barcodeType：代表生成类型(A、B、C)三种类型
            createBarcode('barcode', 'http://127.0.0.1:8094/msg/details/forward?forwardUrl=am81elBVSjYzMVkxR252RzNEZkNqMG5HNnhuTmRBaGU=', 'B')
            // createBarcode('barcode', 'hello', 'B')
        });
    </script>
    </body>
    </html>

**barcode.js**

/**
     * @Description 生成条形码
     * @Auther songsir
     * @Date 2018/11/26
     */
    /*****************************************************************start*****************************************************/
    (function () {
        if (!exports) var exports = window;
        var BARS = [212222, 222122, 222221, 121223, 121322, 131222, 122213, 122312, 132212, 221213, 221312, 231212, 112232, 122132, 122231, 113222, 123122, 123221, 223211, 221132, 221231, 213212, 223112, 312131, 311222, 321122, 321221, 312212, 322112, 322211, 212123, 212321, 232121, 111323, 131123, 131321, 112313, 132113, 132311, 211313, 231113, 231311, 112133, 112331, 132131, 113123, 113321, 133121, 313121, 211331, 231131, 213113, 213311, 213131, 311123, 311321, 331121, 312113, 312311, 332111, 314111, 221411, 431111, 111224, 111422, 121124, 121421, 141122, 141221, 112214, 112412, 122114, 122411, 142112, 142211, 241211, 221114, 413111, 241112, 134111, 111242, 121142, 121241, 114212, 124112, 124211, 411212, 421112, 421211, 212141, 214121, 412121, 111143, 111341, 131141, 114113, 114311, 411113, 411311, 113141, 114131, 311141, 411131, 211412, 211214, 211232, 23311120]
            , START_BASE = 38
            , STOP = 106;
        function code128(code, barcodeType) {
            if (arguments.length < 2)
                barcodeType = code128Detect(code);
            if (barcodeType == 'C' && code.length % 2 == 1)
                code = '0' + code;
            var a = parseBarcode(code, barcodeType);
            return bar2html(a.join('')) + '<label>' + code + '</label>';
        }
        function bar2html(s) {
            for (var pos = 0, sb = []; pos < s.length; pos += 2) {
                sb.push('<div class="bar' + s.charAt(pos) + ' space' + s.charAt(pos + 1) + '"></div>');
            }
            return sb.join('');
        }
        function code128Detect(code) {
            if (/^[0-9]+$/.test(code)) return 'C';
            if (/[a-z]/.test(code)) return 'B';
            return 'A';
        }
        function parseBarcode(barcode, barcodeType) {
            var bars = [];
            bars.add = function (nr) {
                var nrCode = BARS[nr];
                this.check = this.length == 0 ? nr : this.check + nr * this.length;
                this.push(nrCode || ("UNDEFINED: " + nr + "->" + nrCode));
            };
            bars.add(START_BASE + barcodeType.charCodeAt(0));
            for (var i = 0; i < barcode.length; i++) {
                var code = barcodeType == 'C' ? +barcode.substr(i++, 2) : barcode.charCodeAt(i);
                converted = fromType[barcodeType](code);
                if (isNaN(converted) || converted < 0 || converted > 106) throw new Error("Unrecognized character (" + code + ") at position " + i + " in code '" + barcode + "'.");
                bars.add(converted);
            }
            bars.push(BARS[bars.check % 103], BARS[STOP]);
            return bars;
        }
        var fromType = {
            A: function (charCode) {
                if (charCode >= 0 && charCode < 32) return charCode + 64;
                if (charCode >= 32 && charCode < 96) return charCode - 32;
                return charCode;
            },
            B: function (charCode) {
                if (charCode >= 32 && charCode < 128) return charCode - 32;
                return charCode;
            },
            C: function (charCode) {
                return charCode;
            }
        };
        //--| Export
        exports.code128 = code128;
    })();
    /**
     * showDiv：代表需要显示的divID，
     * textVlaue ： 代表需要生成的值，
     * barcodeType：代表生成类型(A、B、C)三种类型
     */
    function createBarcode(showDiv, textValue, barcodeType) {
        var divElement = document.getElementById(showDiv);
        divElement.innerHTML = code128(textValue, barcodeType);
    }

[d43c53013f754d3bb33095c774dd9bd7.png]: https://img-blog.csdnimg.cn/d43c53013f754d3bb33095c774dd9bd7.png