JS生成一維碼(條形碼)功能示例

2019-11-19 17:52:22

字體：大中小

來源：轉載

供稿：網友

本文實例講述了JS生成一維碼(條形碼)功能的方法。分享給大家供大家參考，具體如下：

1、js代碼：

(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：代表需要顯示的divID，  textVlaue ： 代表需要生成的值，  barcodeType：代表生成類型(A、B、C)三種類型*/function createBarcode(showDiv,textValue,barcodeType){  var divElement = document.getElementById(showDiv);    divElement.innerHTML = code128(textValue,barcodeType);}

2.css代碼如下：

.barcode { float:left; clear:both; padding: 0 10px; /*quiet zone*/ overflow:auto; height:0.5in; /*size*/}.right { float:right; }.barcode + * { clear:both; }.barcode div { float:left; height: 0.35in; /*size*/}.barcode .bar1 { border-left:1px solid black; }.barcode .bar2 { border-left:2px solid black; }.barcode .bar3 { border-left:3px solid black; }.barcode .bar4 { border-left:4px solid black; }.barcode .space0 { margin-right:0 }.barcode .space1 { margin-right:1px }.barcode .space2 { margin-right:2px }.barcode .space3 { margin-right:3px }.barcode .space4 { margin-right:4px }.barcode label { clear:both; display:block; text-align:center; font: 0.125in/100% helvetica; /*size*/}/*** bigger ******************************************/.barcode2 { float:left; clear:both; padding: 0 10px; /*quiet zone*/ overflow:auto; height:1in; /*size*/}.barcode2 + * { clear:both; }.barcode2 div { float:left; height: 0.7in; /*size*/}.barcode2 .bar1 { border-left:2px solid black; }.barcode2 .bar2 { border-left:4px solid black; }.barcode2 .bar3 { border-left:6px solid black; }.barcode2 .bar4 { border-left:8px solid black; }.barcode2 .space0 { margin-right:0 }.barcode2 .space1 { margin-right:2px }.barcode2 .space2 { margin-right:4px }.barcode2 .space3 { margin-right:6px }.barcode2 .space4 { margin-right:8px }.barcode2 label { clear:both; display:block; text-align:center; font: 0.250in/100% helvetica; /*size*/}

3.html代碼如下：

<html> <head>  <title>QR-Code Clock</title>  <link rel="stylesheet" href="code128.css" type="text/css" media="screen" charset="utf-8">  <script src="code128.js" type="text/javascript" charset="utf-8"></script>    <script type="text/javascript">(function(divId) { var divElement ,oldOnLoad = window.onload ; function getTimeString() {  var pad = function(n) { return n < 10 ? '0' + n.toString(10) : n.toString(10); }    ,dt = new Date();  return [pad(dt.getHours()), pad(dt.getMinutes()), pad(dt.getSeconds())].join(':'); } function UpdateClock() {  var timeText = getTimeString();  divElement.innerHTML = code128(timeText); } window.onload = function() {  divElement = document.getElementById(divId);  UpdateClock();  setInterval(UpdateClock, 1000);  if (typeof oldOnLoad == 'function') oldOnLoad.apply(this, arguments); }})('div1');  </script> </head> <body>  <input type="button" value ="生成" onclick="createBarcode('div128','12345678','B');"/>   <div class="barcode2" id="div128"></div>   <div class="barcode2" id="div1"></div> </body></html>

運行效果圖如下：